SEFUSE THERMAL CUTOFF

SEFUSE THERMAL CUTOFF

Contents SEFUSE Introduction, Features, Application 2 Construction Standard Ratgs 5 Performance Data Defition of Terms 5 Lead Cuttg and Tapg 6 Cautions 7 Please be sure to read the "Cautions" on pages 7 through 20 before usg. Series Rated Current(AC) Rated Functiong Page SF/E SF/Y SM/A SM/B SM/G 5/0A 5A 2A A 0.5A 7 ~ 240 SF/K 6A 7 ~ 26 7 7 ~ 240 76 ~ 87 87 ~ 5 00 ~ 5 5 7 9 9 9 Select optimum series accordg to temperature and electrical ratgs. Safety standards PSE () UL (USA) CSA (Canada) VDE (Germany) BEAB (UK) CCC (Cha)

Thermal Cutoff SEFUSE is a compact and reliable thermal cutoff designed to protect domestic electrical appliances and dustrial electrical equipment from fire. Cutoff occurs and an electrical circuit opens when ambient temperature creases to an abnormal level. Two SEFUSE types are available. The SF type uses an organic thermosensitive material as the thermal pellet and its operatg temperature range is 7 to 240. The SM type uses a fusible alloy and has an operatg range of 76 to 87. SEFUSE is manufactured and, and both factories are certified by the International Standards Organization (ISO) for the ISO900 quality standard. Features Excellently sensitive to ambient temperature. Stable and precise operation. One shot operation. Wide choice of types to suite the application. (SF or SM) SF types has ceramic pipe to protect sealg res from the stress when bendg the leads. (excludg SF/K type) Meets many safety standards. Eco-friendly products, meetg the Directive on WEEE(RoHS), are available. For the SF types, the AgCuO is used as the material of slidg contact, and its patent has been registered worldwide countries, such as USA and Europe. Applications Irons, hair dryers, heaters, Refrigerators, rice cookers, water pots, coffee makers Air conditioners, ventilation fans, electric fans, gas boilers Transformers, power suppliers, adaptors, solenoids Chargers, battery packs, Air conditioner for Automobile Copiers, laser beam prters, power taps Iron LCD Television Rice cooker For the purpose of photography, the sulation tube of the thermal cutoff has been removed. In reality, the thermal cutoff is covered by the sulation tube. Application Examples Inverter Transformer 2

SEFUSE Construction SF type The SF type uses an organic thermosensitive pellet side a metal case. It features a large cutoff (rated) current of 6 A to 5 A (AC). Before Operation After Operation Ceramic Bushg Sealg Res Sprg B Thermal Pellet Lead B Metal Case Sprg B Thermal Pellet Lead A Ceramic Pipe* Sprg A Slidg Contact Disks Metal Case Sprg A Slidg Contact Disks The SF type contas a slidg contact, sprgs, and a thermal pellet side a metal case. When sprg B is compressed, firm contact between lead A and the slidg contact occurs. At normal temperatures, current flows from lead A to the slidg contact and then through the metal case to lead B. When the ambient temperature rises to the SEFUSE operatg temperature, the heat transferred through the metal case melts the thermal pellet. When the thermal pellet melts, sprgs A and B expand, movg the slidg contact away from lead A. The electrical circuit is opened by breakg contact between the slidg contact and lead A. *Not usg for SF/K series.

SM type The SM type uses a fusible alloy side a ceramic case. It has a cutoff (rated) current of 0.5 A to 2.0 A (AC). Because of its sulated case, the SM type can be attached directly where temperature detection is required. Before Operation Ceramic Case Fusible Alloy Sealg Res After Operation Fusible Alloy Sealg Res Lead Flux Lead Lead Flux Lead In the SM type, leads are connected by a fusible alloy. The current flows directly from one lead to the other. The fusible alloy is coated with a special flux. When ambient temperature rises to the SEFUSE operatg temperature, the fusible alloy melts and condenses to a drop around the end of each lead because of surface tension and the coatg of special flux. The electrical circuit then opens. 4

SF type Standard Ratgs SF/E Series SEFUSE Dimension (Unit:mm) Note: The dimensions for long lead devices are parentheses. Markg (SF70E~SF29E) Markg 2 (SF9E~SF240E) PSE Mark Inspector Name Factory Code* SEFUSE SF 70E P S E JET 7 0A 250V~ 065 Brand Name Rated Functiong Rated Current Rated Voltage Lot PSE Mark Inspector Name Factory Code* SEFUSE SF88E- P S E JET 92 0A 250V~ 065 Brand Name Rated Functiong Rated Current Rated Voltage Lot * Factory Code represents the factory location as shown below : none : C How to read a lot number ex.) 0 6 5 Sub-lot number Month X October Y November Z December Last two digit of year 5

Ratgs ) Meet for WEEE (RoHS) 2) SF 70E SF 76E SF 9E SF 96E SFE SF9E SF29E SF9E SF52E SF69E SF88E SF24E SF226E SF240E Rated Functiong Tf 7 77 94 99 2 42 57 72 92 26 227 240 Operatg 4 0 Th Tc 58 62 79 84 98 06 8 27 42 57 77 200 Tm 50 60 50 59 72 89 SF84E 84 74 20 ) Rated Current Rated Voltage 4) 4) 6) 5A AC250V 0A (Resistive) U L CSA VDE BEAB CCC E7747 72780 677802 C060 * *2 (LR520) -7-0002 Note: ) : No use the hazardous substances prescribed by WEEE(RoHS). 2) numbers are for standard lead devices. For long leads, add the number "-" at the end of part number. ) Tm of SF88E, SF24E, SF226E, SF240E are as follows. Tm SF240E UL CSA VDE BEAB CCC SF88E 00 00 75 75 SF24E 50 50 SF226E 240 0 00 75 50 75 50 4) The electrical ratgs by safety standards are as follows. 5) 008 00 0 02 0 04 05 * *4 PSE 00 002 00 004 005 006 007 008 009 7) JET974-200-XXXX JET975- ( ) ( ) 200-XXXX *: 20020020502072 (0A) 2004002052099 (5A) *2: 20020020502074 (0A) 20040020520822 (5A) *: -549 *4: -54 Rated Voltage AC20V AC240V AC250V AC277V UL CSA VDE BEAB CCC (Inductive) 5A (Resistive) 20A (Resistive) 5A (Resistive) 0A (Resistive) 0A 0A 0A 0A 5A (Resistive) (Inductive) 5A (Resistive) 5A 5A 5A 7A (Resistive) 5A (Resistive) PSE 5) SF69E, SF84E, SF88E, SF24E, SF226E and SF240E has a recognition of CH ratg by UL. 6) The number parentheses are previous number. Both number can be quired. 7) The products dicated * and *4 mention a certified number by the former law, the Electrical Appliance Material Control Law, as a transitional measure to the current law, the Electrical Appliance and Material Safety Law of. 6

SF type Standard Ratgs SF/K Series Dimension (Unit:mm) SEFUSE Markg (SF70K~SF9K) Markg 2 (SF88K,SF24K) Rated Current PSE Mark SEFUSE SF 70K 7 6A 250V~ <PS>E JET 065 Brand Name Rated Functiong Rated Voltage Inspector Name Lot Rated Current PSE Mark SEFUSE SF88K 92 6A 250V~ <PS>E JET 065 Brand Name Rated Functiong Rated Voltage Inspector Name Lot How to read a lot number ex.) 0 6 5 Sub-lot number Month X October Y November Z December Last two digit of year SF/Y Series Dimension (Unit:mm) Note: The dimensions for long lead devices are parentheses. Markg (SF70Y~SF29Y) Markg 2 (SF9Y~SF240Y) PSE Mark Inspector Name SEFUSE SF 70Y P S E JET 7 5A 250V~ 065 Brand Name Rated Functiong Rated Current Rated Voltage Lot PSE Mark Inspector Name SEFUSE SF88Y- P S E JET 92 5A 250V~ 065 Brand Name Rated Functiong Rated Current Rated Voltage Lot How to read a lot number ex.) 0 6 5 Sub-lot number Month X October Y November Z December Last two digit of year 7

Ratgs ) Meet for WEEE (RoHS) SF 70K SF 76K SF 9K SF 96K SF9K SF88K SF24K Rated Functiong Tf 7 77 94 99 2 92 26 Operatg 0 4 Th 45 5 66 7 94 64 98 Tm 50 00 Rated Current 6A 2) (Resistive) Rated Voltage AC250V E7747 VDE 677802-7 -0006 Note: ) : No use the hazardous substances prescribed by WEEE(RoHS). 2) The followg recognition is approved by UL and VDE. 0A(Resistive)/AC250V ) SF88K and SF24K has a recognition of CH ratg by UL. 4) The products dicated * mention a certified number by the former law, the Electrical Appliance Material Control Law, as a transitional measure to the current law, the Electrical Appliance and Material Safety Law of. U L cul ) BEAB C057 ( ) 008 00 02 05 * *: -549 This series are made only. Ratgs ) Meet for WEEE (RoHS) This series are made only. 2) ) Rated Functiong Operatg Rated Current Rated Voltage U L CCC SF 70Y SF 76Y SF 9Y SF 96Y SFY SF9Y SF29Y SF9Y SF52Y SF69Y SF88Y SF24Y SF226Y SF240Y 7 77 94 99 2 42 57 72 SF84Y 84 92 26 227 240 0 4 5A AC250V E7747 E7747 *: 20040020522568 Note: ) : No use the hazardous substances prescribed by WEEE(RoHS). *2: -549 *: -54 2) numbers are for standard lead devices. For long leads, add the number "-" at the end of part number. ) The products dicated *2 and * mention a certified number by the former law, the Electrical Appliance Material Control Law, as a transitional measure to the current law, the Electrical Appliance and Material Safety Law of. * 4) PSE JET975-200-XXXX PSE JET975-200-XXXX ( ) 008 00 0 02 0 04 05 *2 * 8

SM type Standard Ratgs SM/A Series Dimension (Unit:mm) SEFUSE Markg Rated Functiong Rated Current PSE Mark SEFUSE SM0A0 5 65 2A 250V~ <PS>E JET Brand Name Factory Code* Lot Rated Voltage Inspector Name * Factory Code represents the factory location as shown below : none : C How to read a lot number ex.) 6 5 Sub-lot number Month X October Y November Z December Last one digit of year SM/B Series Dimension (Unit:mm) Markg Rated Functiong Rated Current PSE Mark SEFUSE SM0B0 5 65 A 250V~ <PS>E JET Brand Name Factory Code * Lot Rated Voltage Inspector Name * Factory Code represents the factory location as shown below : none : C How to read a lot number ex.) 6 5 Sub-lot number Month X October Y November Z December Last one digit of year SM/G Series Dimension (Unit:mm) Markg PSE Mark Rated Functiong <PS>E 65 SEFUSE 0G0 0.5A 5 250V~ Lot Brand Name Rated Current Rated Voltage How to read a lot number ex.) 6 5 Sub-lot number Month X October Y November Z December Last one digit of year 9

Ratgs ) Meet for WEEE (RoHS) 2) SM072A0 SM095A0 SM0A0 76 00 5 SM25A0 200 96 SM26A0 40 SM0A0 SM4A0 SM46A0 SM64A0 SM82A0 5 9 5 69 87 2 A (Resistive) AC250V A/DC50V(UL) 4A/DC50V(VDE) 4 A DC50V 7 A DC50V Note: ) : No use the hazardous substances prescribed by WEEE(RoHS). 2) numbers are for standard devices. For long leads, change the last number from 0 to. ) DC ratg are approved by UL and VDE. 4) SM072A0 and SM4A0 have c-ul recognition. 46 SM082A0 87 52 65 80 00 SM7A0 42 07 SM50A0 Rated Functiong Operatg Tf 50 Th Tc SM092A0 97 62 04 6 52 Tm 00 200 5 25 45 200 80 95 Electrical Ratgs AC ) DC U L CSA VDE BEAB CCC PSE E7747 4) 72780 (LR520) 4) 5) 72780 (LR520) 677802-7 -000 C054 Under Application C054 C054 5) The number parentheses are previous number. Both number can be quired. 6) The products dicated * mention a certified number by the former law, the Electrical Appliance Material Control Law, as a transitional measure to the current law, the Electrical Appliance and Material Safety Law of. * * *2 *2 JET975- JET974- ( 200-XXXX) ( 200-XXXX) 007 07 004 06 00 006 002 00 005 * 00 0 02 0 04 05 6) *: 20020020500264 *2: 20020020502067 *: -556 Ratgs ) Meet for WEEE (RoHS) 2) Rated Functiong Tf Operatg Th Tc SM082B0 87 52 SM092B0 97 62 SM095B0 SM0B0 00 5 65 80 SM25B0 SM26B0 SM0B0 SM4B0 5 9 96 00 04 SM7B0 42 07 SM46B0 5 SM50B0 50 6 Tm 200 5 25 200 40 45 200 Electrical Ratgs AC A (Resistive) AC250V ) DC A/DC50V.5 A DC50V 6 A DC50V U L CSA VDE BEAB CCC PSE E7747 4) 72780 (LR520) 5) 72780 (LR520) 677802-7 -0004 C00 Under Application C00 C00 * *2 * *2 JET975- JET974- ( 200-XXXX) ( 200-XXXX) 004 06 00 006 002 00 00 0 02 0 *: 200200205002645 *2: 20020020502066 Note: ) : No use the hazardous substances prescribed by WEEE(RoHS). 2) numbers are for standard devices. For long leads, change the last number from 0 to. ) DC ratg are approved by UL and VDE. 4) The number parentheses are previous number. Both number can be quired. 5) SM4B0 has c-ul recognition. Ratgs ) Meet for WEEE (RoHS) 2) Rated Functiong Tf Operatg SM095G0 SM0G0 SM26G0 SM0G0 00 5 5 65 80 96 00 5 25 40 45 SM4G0 9 04 SM7G0 42 07 200 SM46G0 5 6 Note: ) : No use the hazardous substances prescribed by WEEE(RoHS). 2) numbers are for standard devices. For long leads, change the last number from 0 to. Th Tc Tm Electrical Ratgs AC 0.5 A (Resistive) AC250V ) DC A/DC50V 5 A DC50V U L CSA VDE BEAB CCC PSE 4) 72780 (LR520) E7747 72780 (LR520) 677802-7 -000 This series are made only. C090 C090 (JET975-200-XXXX) 00 006 002 00 ) DC ratg are approved by UL and VDE. 4) The number parentheses are previous number. Both number can be quired. * *: 2002002050207 0

Performance Data SF/E Series SF/K Series SF/Y Series Rise Response Time SEFUSE 40 (sec) 0 SF/E 40 Rise 20 0 SF/K SF/Y Time for openg after immersion to oil 0 20 0 SF/E SF/Y SF/K 0 0 20 0 40 0 0 5 0 5 20 Current (A) Difference (oil temp. mus operatg temp.) SM/A Series Rise Response Time Rise 5 0 25 20 5 0 SM082A0 SM092A0 SM0A0 SM25A0 SM26A0 SM0A0 SM64A0 SM095A0 SM072A0 SM4A0 SM46A0 SM50A0 SM7A0 Time for openg after immersion to oil (sec) 0 20 0 SM082A0 SM095A0 SM072A0 SM4A0 SM092A0 SM7A0 SM0A0 SM46A0 SM25A0 SM50A0 SM26A0 SM64A0 SM0A0 SM82A0 5 SM82A0 0 0 20 0 40 0 2 4 5 6 7 Current (A) Difference (oil temp. mus operatg temp.)

72 7 74.7.9 4. 96 97 98 5.2 5.4 5.6 0 2 2.8.0.2 24.4 25.4 26.4 2.7 2.9. 28 29 0 2.7 2.9. SM072A0 SM095A0 8.5 82.5 8.5 5.8 6. 6.8 SM082A0 90.6 9.6 92.6 5.8 6. 6.8 SM092A0 7 8 9.8 4. 4.8 SM7A0 45 46 47 4.4 4.7 5.0 SM46A0 SM50A0 SM0A0 SM25A0 25 26 27 2.7 2.9. SM26A0 SM0A0 2 4.0.2.4 6 64 65 2.7 2.9. 8 82 8 2.2 2.4 2.6 SM4A0 SM64A0 SM82A0 Internal Resistance and itial operatg temperature (mω/25mm) 0.5.5 2.0.0 Internal Resistance itial operatg temperature 90 9 22 2 24 224 225 226 25 26 27 Operatg 9 20 29 0 8 9 40 52 5 54 67 68 69 Operatg 69 8 89 70 7 7 74 75 9 92 9 95 96 97 08 09 0 SF70E/K/Y SF/Y SF/E SF/K SF76E/K/Y SF9E/K/Y SF96E/K/Y SFE/Y SF9E/K/Y SF29E/Y SF9E/Y SF52E/Y SF69E/Y SF88E/K/Y 82 84 80 SF84E/Y SF24E/K/Y SF226E/Y SF240E/Y Operatg Internal Resistance (mω/25mm) Operatg Internal Resistance (mω/25mm) Operatg 2

Performance Data SM/B Series SEFUSE Rise Response Time Rise 0 25 20 5 0 SM0B0 SM26B0 SM0B0 SM082B0 SM092B0 SM095B0 SM25B0 SM4B0 SM7B0 SM46B0 SM50B0 Time for openg after immersion to oil (sec) 0 20 0 SM082B0 SM095B0 SM092B0 SM4B0 SM0B0 SM7B0 SM25B0 SM46B0 SM26B0 SM50B0 SM0B0 5 0 0 20 0 40 0 2 4 5 6 Current (A) Difference (oil temp. mus operatg temp.) SM/G Series Rise Response Time Rise 25 20 5 0 SM095G0 SM7G0 SM46G0 SM0G0 SM26G0 SM0G0 SM4G0 Time for openg after immersion to oil (sec) 0 20 0 SM095G0 SM0G0 SM4G0 SM26G0 SM7G0 SM0G0 SM46G0 5 0 0 20 0 40 0 2 4 5 Current (A) Difference (oil temp. mus operatg temp.)

Internal Resistance and itial operatg temperature Internal Resistance and itial operatg temperature 96 97 98 0 2 0 2 5 6 7 25 26 27 4 5 6 SM095G0 SM0G0 SM26G0 28 29 0 4.0 5.0 6.0 4 5 6 4.5 5.5 6.5 SM0G0 SM4G0 8 82 8 7.2 8.2 9.2 0 2 4.4 4.6 4.8 25 26 27 4.4 4.6 4.8 SM082B0 96 97 98 8 9 0 SM095B0 90.6 9.6 92.6 8 9 0 SM092B0 SM0B0 SM26B0 25 26 27.8 4.2 4.6 SM25B0 28 29 0 4.4 4.6 4.8 2.5.5 4.5 4. 4.4 4.7 SM0B0 SM4B0 7 8 9 5.6 6. 6.6 SM7B0 45.5 46.5 47.5 5.7 6.2 6.7 SM46B0 SM50B0 6 7 8 6.8 7.6 8.4 SM7G0 45.5 46.5 47.5 6.4 7.2 8.0 SM46G0 Internal Resistance (mω/25mm) Operatg Internal Resistance (mω/25mm) Operatg Internal Resistance (mω/25mm) Operatg Internal Resistance (mω/25mm) Operatg 4

Defition of Terms SEFUSE Rated Functiong Rated functiong temperature is the operatg temperature of thermal cutoffs, measured usg the method specified the safety standard. In present PSE (Electrical Appliance and Material safety Law) of, the operation should be with the specified operatg temperature range of ±7. In various standards such as UL, CSA, VDE, BEAB and CCC which comply with the IEC standard, it is called the rated functiong temperature, and should operate with the prescribed temperature range of +0 / -0. It is represented by the symbol Tf the UL, CSA, VDE, BEAB and CCC standards. In SEFUSE, a temperature that complies with both standards is set as the rated functiong temperature, and is dicated on the body of the thermal cutoff. Operatg Operatg temperature is the actual operatg temperature range when the thermal cutoff is made to operate side a constant temperature oven whose temperature is raised at the rate of 0.5 to /m. while a detection current of 0 ma or lower is applied. The operatg temperature is a standard set by ourself and is not specified by a safety standard. Th, Tc (Holdg ) Holdg temperature is the maximum temperature at which, when applyg a rated current to the thermal cutoff, the state of conductivity is not changed durg specified time not less than 68 hours ( week). It is represented by the symbol Th the UL and CSA standard, Tc the VDE, BEAB and CCC standard as an option. Tm (Maximum Limit) Maximum temperature limit is the temperature up to which thermal cutoffs will not change its state of cutoff without impairg. It is represented by the symbol Tm the UL, CSA, VDE, BEAB and CCC standards. 5

Lead Cuttg and Tapg SEFUSE The followg lead cuttg and tapg are available as your request. Applicable Products Tapg Lead Cuttg Lead Formg Standard lead type Long lead type SF/E SF/K SF/Y SM/A0 SM/B0 SM/G0 SF/E- SF/Y- SM/A SM/B SM/G Tapg reel R R ø0 ø75 ø285 Z P 89 t SF/E SF/K,SM : 2000pcs/reel : 2500pcs/reel L S T W L2 T S Lead Cuttg SF Type L : 9~2 L2 : 7~ (mm) L L2 SM Type L, L2 : 9~5 (mm) L L2 Lead Formg A A A A A: Should be over 5 mm For more formation on dimensions not described diagrams above, please contact us. 6

Cautions SEFUSE SEFUSE This section describes cautions designed to protect the performance of the thermal cutoff. Be sure to read and fully understand these cautions. To obta full performance from the thermal cutoff, it is necessary for the customer to appropriately store the thermal cutoff, design appropriate circuits for the application, and perform evaluations, mountg and testg as necessary. Problems arisg from the appropriate execution of the above are the responsibility of the customer, and we decles any and all responsibility. Design Do not use this device for and purpose other than as a thermal cutoff. The thermal cutoff is designed to detect abnormal rises temperature and break circuits if needed. It is not a current fuse that cuts excess current. If used as a current fuse, the SEFUSE may malfunction. Do not use this device aerospace equipment, aeronautical equipment, nuclear reactor control systems, life support equipment or systems, transportation machery enge control or safetyrelated equipment. This device is designed for use household electric appliance, office automation equipment, audio and video equipment, computer communications equipment, test and measurement equipment, personal electronic equipment and transportation equipment (excludg enge control). The customer should select the proper thermal cutoff device, mountg location, and mountg method as appropriate for each application. Verify whether the chosen selections are appropriate by repeatedly testg the fal design for thermal cutoff under normal conditions as well as under predicted maximum abnormal conditions. Mount the SEFUSE so that it can detect abnormal heat as quick as possible. The thermal cutoff operates when the side thermal element melts. Therefore, if the side thermal element does not reach the operatg temperature, the thermal cutoff does not operate, even if the ambient temperature rises to the operatg temperature. When the ambient temperature rises suddenly or detect heat partially, it may take time till the SEFUSE operates. Mount the SEFUSE so that the temperature of every part become to equal. If the SF-type lead B, which is caulked to the metal case, is mounted so that it only conducts heat to the body, the temperature around the thermal pellet can be always higher than the other places the metal case, which can cause the SEFUSE to early open. Be sure to connect the lead A, the res-sealed side, to the heat source. Mountg the SEFUSE so that the temperature of the lead A is always lower than that of the lead B can also cause the SEFUSE to early open. 7

Make designs so that the temperature of the body of the thermal cutoff does not exceed the temperatures shown Table. If, the temperature is exceeded on a regular basis, the thermal cutoff may start operatg only at temperature lower than the normal operatg temperature. Malfunctions may also occur. Even if the thermal cutoff's operatg temperature is exceeded, it may malfunction. Table SM Type SF Type Type Body Type Body SM072A 52 SM082A, B 62 SM092A, B 72 SM095A, B, G SM0A, B, G SM25A, B 75 90 06 SM26A, B, G 06 SM0A, B, G 0 SM4A, B, G 4 SM7A, B, G 7 SM46A, B, G 26 SM50A, B 26 SM64A SM82A 40 40 SF 70E,K,Y 50 SF 76E,K,Y 56 SF 9E,K,Y 7 SF 96E,K,Y 76 SFE, Y 90 SF9E,K,Y 99 SF29E,Y 09 SF9E,Y 9 SF52E,Y 2 SF69E,Y 40 SF84E,Y 40 SF88E,K,Y 40 SF24E,K,Y 40 SF226E, Y 40 SF240E, Y 40 s listed the table aren't ambient temperature but body temperature of a thermal cutoff. The SEFUSE has a limited life. Although the thermal elements are made of durable substances for the long time usg, their lifetime varies, dependg on usg conditions. Especially, the more often the SEFUSE are used at the temperature nearly to the operatg temperature, the lifetime may be short. Therefore, We recommend performg a reliability test, with the SEFUSE mounted to the actual application, or under the almost same conditions as the actual ones, and confirmg that there is no problem with the lifetime. The body temperature of the thermal cutoff becomes higher as current passes through. The body temperature of the thermal cutoff becomes higher as current passes through and might rise higher than the ambient operatg temperature (see test data). The temperature may rise even higher dependg on the mountg method and other conditions. Therefore, after mountg the thermal cutoff under the same conditions you would use for the actual application, work the fal product and measure the body temperature of the thermal cutoff. Use the thermal cutoff with a voltage and current level lower than the rated level. If the thermal cutoff is used with a voltage or current level higher than the rated level, contacts may melt the SF type, causg the fuse to malfunction. In the SM type, the body of the thermal cutoff may be destroyed. Do not use the thermal cutoff water, organic solvents or other liquids, or environments contag sulfurous acid gas, nitrous acid gas, or high humidity. Dog so will cause deterioration of the sealg res, the thermal cutoff may operate at lower than operatg temperature, or any other malfunctions may occur. Also, the thermal cutoff may not operate even if its operatg temperature is exceeded. 8

Cautions SEFUSE SEFUSE Lead wire process When bendg the lead wire, order to protect the res seal from excessive pressure, secure the lead wire close to the case and bend the part beyond the secured section.the lead wire should be bent at a distance mm or more from the body of the fuse, and should not be twisted. mm or more Secured Secured The tensile strength applied to the lead wire should be 5 kg or less for the SF type, and kg or less for the SM type. The strength applied to the body of the thermal cutoff should be 0 kg or less for the SF type, and 5 kg or less for the SM type. In the case of an SF type, deformation of the case may change the location of the slidg contact durg operation and may cause the thermal cutoff to operate only at temperatures lower than the normal operatg temperature range. The thermal cutoff also may not operate even if the thermal cutoff's operatg temperature is exceeded. SF (0kgf) SM (5kgf) ø 0.8 steel wire Mountg SEFUSE can be mounted by solderg, caulkg, or weldg. The connectg position at the lead of res-sealed side should be 5 mm or more from the body of the thermal cutoff. SF Type SM Type 5 mm or more connectg position 5 mm or more 5 mm or more connectg position If solderg, note that the thermal cutoff may not function because of excessive solder temperature. To prevent such malfunctions, for example, holdg the lead near the case by a tool is effective for allowg the heat to escape, and the solderg should be done short terval. Another effective method is to use a lower solder temperature and to solder at a location that is distant from the case. If caulkg or weldg, be careful to keep the resistance value of the connectg section low. If the connectg section has a high resistance value, the passg current may generate an abnormally high temperature that will cause the thermal cutoff to operate (break the circuit). After mountg the thermal cutoff, be careful not to apply force that may pull, push or twist the lead wires. 9

If usg a SF type thermal cutoff, be sure not to make the lead on the res-sealed side touch the case. This would cause the current to flow from the lead on the res-sealed side to the opposite lead so that the thermal cutoff cannot break the circuit. Note that the body of the SF type is the same potential as the circuit. Therefore, it must be electrically isolated from the other metallic part. Storage The body and lead A of SF type, and the leads of SM092A, SM64A, SM82A and SM092B are silver-plated. Therefore, these parts may discolor because of sulfuration. In the case, the markg of the body will become difficult to discrimate or the solder-ability of lead will decle. To avoid this, the SEFUSE should not keep around materials (such as cardboard or rubber, etc.) which generate sulfurous acid gas. When the SEFUSE have to be storaged a cardboard box, the SEFUSE's packs should be put to other bags (such as polyethylene) and make sure the packs seal. Recommendation We recommend the followg tests on the receivg of the SEFUSE and after mountg it, as it may have a mechanical load or thermal fluence under transportation or when beg mounted. ) Appearance check 2) Resistance check (comparg before with after), or conductive check ) X-ray spection 4) Operation check for samplg Be careful when mountg the thermal cutoff because external force, heat, or a harmful atmosphere (contag excessive humidity or sulfurous acid gas) may damage the characteristics of the thermal cutoff. If applicable, it is recommended to warn general consumers who are not aware of the usage cautions for the thermal cutoff not to mount, remove or replace the thermal cutoff through a note to this effect the user's manual and other related material. If you desire any clarifications or explanations regardg these cautions, please contact us. The values contaed this document were obtaed under certa testg conditions by us. They are not guaranteed and are for reference only. 20

The formation here is based on the documents as of January 2006, and is subject to change without notice. Therefore it is recommended to refer to latest dividual formation such as drawg for mass production designg. It is prohibited to reprt or copy the contents here without written agreement of NEC SCHOTT Components Corporation. If problems relevant to the dustrial property right of third parties occur by usg the products, we would not assume any responsibility for matters other than ones directly related to the manufacturg process, which please note. Although we have been makg contuous efforts to improve the quality and reliability of our products, the possibility of defects cannot be elimated entirely. Therefore when usg our electronic component products, please make sure to consider safety measures its design, such as redundancy, fire contament and malfunction prevention agast physical juries, fire disasters and social damages consideration of the said defect occurrences. Our products are classified to 2 quality grades: "Standard" and "Special". The recommended applications of the products accordg to its quality level are dicated below. If you tend to use our products for applications other than "Standard" level, please make sure to consult with our sales representative advance. "Standard" Computers, office equipment, communication equipment, measurg equipment, audio & visual equipment, home electric appliances, mache tools, personal electric equipment and dustrial robots. etc. "Special" Transportation equipment (automobiles, tras, ships and others), aircrafts, aerospace equipment, medical equipment for life support. etc. 2

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Please contact the followg representatives for the formation on the SEFUSE. TF Division Planng & SCM Group Sales Section -Nichiden,Makuchi-cho,koka-shi,Shiga 528-004, TEL : +8-748-6-6629 FAX : +8-748-6-6627 E-mail : tf.nsc@schott.com http://www.nec-schott.co.jp The formation this document is subject to change without notice. Feb. 2006(E00)