PCB Relay Fully Sealed Relay with High Impulse Dielectric for Use in Telecommunications Equipment High sensitivity can be driven by digital circuits. Horizontal design allows use in /2-inch PCB racks. Impulse withstand voltage meets FCC Part 6 requirements. Relays can be mounted side-by-side due to low magnetic leakage. Single- and double-winding latching relays also available. Special models available for low thermoelectromotive force. RC FCC RoHS Compliant Ordering Information Single-side Stable Type Contact Single-winding Latching Type Double-winding Latching Type Model Number Legend Refer to pages 6 to 7 for details. General purpose DPDT -274P-ST-US -474P-ST-US Low-sensitivity DPDT -274P-ST40-US Contact -474P-ST40-US General purpose DPDT U-274P-ST-US Contact U-474P-ST-US General purpose DPDT K-274P-ST-US K-474P-ST-US Low-sensitivity DPDT K-274P-ST40-US K-474P-ST40-US Ag + Au-Alloy Ag + Au-Alloy Ag + Au-Alloy Note: When ordering, add the rated coil voltage to the model number. Example: -274P-ST-US 2 VDC Rated coil voltage - - - VDC 2 3 4 6 7. Relay Function None: Single-side stable 3. Contact Type 7: Bifurcated crossbar U: Single-winding latching Ag (Au-Alloy) contact K: Double-winding latching 4. Enclosure Ratings 2. Contact Form 4: Fully sealed 2: DPDT. Terminals 4: P: Straight PCB 6. Stand-off ST: Stand-off mm 7. Special Function 40: Low-sensitivity (400 mw) LT: Low thermoelectromotive force. Approved Standards US: UL, CSA certified. Rated Coil Voltage 3, 4.,, 6,, 2, 24, 4 VDC
Specifications Coil Ratings General-purpose, DPDT Relays Rated current 66.7 ma 44.6 ma 40 ma 33.3 ma 22.2 ma 6.7 ma.3 ma 4. ma Coil resistance 4 Ω Ω 2 Ω Ω 40 Ω 720 Ω 2,0 Ω,70 Ω General-purpose, Relays Low-sensitivity DPDT Relays Low-sensitivity Relays Armature OFF 0.07 0.6 0.2 0.2 3. 4. 3.7 Armature ON 0.06 0.4 0. 0.26 0.7.06 4. 2. % min. of rated voltage Max. voltage 200% of rated voltage at 23 C Approx. 200 mw Approx. 23 mw Rated current 20 ma 7. ma 72. ma 60 ma 40 ma 30 ma ma 7. ma Coil resistance 2 Ω 6.3 Ω 6 Ω 0 Ω 22 Ω 400 Ω,600 Ω 6,400 Ω Armature OFF 0.0 0. 0.4 0.2 0.4 0. 3.2 2. Armature ON 0.04 0.0 0.2 0.7 2.7. % min. of rated voltage Approx. 360 mw Rated current 33.3 ma. ma 0 ma 66.7 ma 44.3 ma 33.3 ma 6.7 ma.3 ma Coil resistance 22. Ω Ω 62. Ω 0 Ω 203 Ω 360 Ω,440 Ω,760 Ω Armature OFF 0.03 0.06 0.0 0. 0.27 0.2 2. 7. Armature ON 0.02 0.06 0.07 0. 0.23 0.43. 6.4 % min. of rated voltage Approx. 400 mw Rated current 33.3 ma. ma 0 ma 66.7 ma 44.3 ma 33.3 ma 6.7 ma.3 ma Coil resistance 22. Ω Ω 62. Ω 0 Ω 203 Ω 360 Ω,440 Ω,760 Ω Armature OFF 0.03 0. 0.2 0.7 0.42 0.7 2..2 Armature ON 0.02 0.07 0.0 0.3 0.2 2.2.6 % min. of rated voltage Approx. 400 mw Note:. The rated current and coil resistance are measured at a coil temperature of 23 C with a tolerance of ±%. 2. Operating characteristics are measured at a coil temperature of 23 C. 3. The maximum voltage is the highest voltage that can be imposed on the relay coil. 0
Single-winding Latching, DPDT Relays Rated current 33.7 ma 22.2 ma 20 ma 6.7 ma. ma.3 ma 4.2 ma 2. ma Coil resistance Ω 202 Ω 20 Ω 360 Ω Ω,440 Ω,760 Ω,000 Ω Armature OFF 0. 4 0.44.3 2..2 2. Armature ON 0. 0.2 0.4.07 2 7.2 22 Single-winding Latching, Relays Double-winding Latching, DPDT Relays Double-winding Latching, Relays Max. voltage 200% of rated voltage at 23 C Approx. 0 mw Approx. 20 mw Rated current 6. ma 7.2 ma 64 ma 3.3 ma 3.6 ma 26.7 ma 3.3 ma 6.7 ma Coil resistance 2. Ω 63.2 Ω 7. Ω 2. Ω 23 Ω 40 Ω,00 Ω 7,200 Ω Armature OFF 0.03 0.06 0.0 0. 0.2 0.4. 7 Armature ON 0.02 0.04 0.06 0.0 0. 2.3.2 Approx. 320 mw Rated current 66.7 ma 40.2 ma 36 ma 30 ma 20 ma ma 7. ma 4.2 ma Coil resistance 4 Ω 2 Ω 3 Ω 200 Ω 40 Ω 00 Ω 3,200 Ω,20 Ω Set Armature OFF 0.037 0.0 0. 0.6 2.. Armature ON 0.027 0.06 0.0 0.2 0.2 0.4. 6.3 Reset Armature OFF 0.027 0.06 0.0 0.2 0.2 0.4. 6.3 Armature ON 0.037 0.0 0. 0.6 2.. Max. voltage 200% of rated voltage at 23 C Approx. 200 mw Approx. mw Note:. The rated current and coil resistance are measured at a coil temperature of 23 C with a tolerance of ±%. 2. Operating characteristics are measured at a coil temperature of 23 C. 3. The maximum voltage is the highest voltage that can be imposed on the relay coil. Approx. 200 mw Rated current 6. ma 7.2 ma 64 ma 3.3 ma 3.6 ma 26.7 ma 3.3 ma 6.7 ma Coil resistance 2. Ω 63.2 Ω 7. Ω 2. Ω 23 Ω 40 Ω,00 Ω 7,200 Ω Set Armature OFF 0.03 0.06 0.0 0. 0.2 0.4. 7 Armature ON 0.02 0.04 0.06 0.0 0. 2.3.2 Reset Armature OFF 0.02 0.04 0.06 0.0 0. 2.3.2 Armature ON 0.03 0.06 0.0 0. 0.2 0.4. 7 Approx. 320 mw
Double-winding Latching, Low-sensitivity DPDT Relays Rated current 20 ma 7. ma 72. ma 60 ma 40 ma 30 ma ma 7. ma Coil resistance 2 Ω 6.3 Ω 6 Ω 0 Ω 22 Ω 400 Ω,600 Ω 6,400 Ω Set Armature OFF 0.0 0.04 0.0 0.07 0.6 0.2. 4 Armature ON 0.0 0.02 0.03 0.0 0.2 0.2 0.7 2. Reset Armature OFF 0.0 0.02 0.03 0.0 0.2 0.2 0.7 2. Armature ON 0.0 0.04 0.0 0.07 0.6 0.2. 4 Approx. 360 mw Double-winding Latching, Low-sensitivity Relays Rated current 20 ma 7. ma 72. ma 60 ma 40 ma 30 ma ma 7. ma Coil resistance 2 Ω 6.3 Ω 6 Ω 0 Ω 22 Ω 400 Ω,600 Ω 6,400 Ω Set Armature OFF 0.02 0.04 0.06 0.0 0..2 4.4 Armature ON 0.0 0.03 0.0 0.07 0.4 0.23 0.2 3.2 Reset Armature OFF 0.0 0.03 0.0 0.07 0.4 0.23 0.2 3.2 Armature ON 0.02 0.04 0.06 0.0 0..2 4.4 Note:. The rated current and coil resistance are measured at a coil temperature of 23 C with a tolerance of ±%. 2. Operating characteristics are measured at a coil temperature of 23 C. 3. The maximum voltage is the highest voltage that can be imposed on the relay coil. Contact Ratings Load Rated load Contact material Rated carry current Item Max. switching voltage Approx. 360 mw -274P-ST(40)-US/474P-ST(40)-US Resistive load (cosφ = ) 0. A at 2 VAC; 2 A at 30 VDC Ag (Au-Alloy) 3 A 20 VAC, 220 VDC Max. switching current 2 A A Inductive load (cosφ = 0.4; L/R = 7 ms) A at 2 VAC; A at 30 VDC Max. switching power 2 VA, 60 W 62. VA, 30 W Failure rate (reference value) Load Rated load Contact material Rated carry current Item Max. switching voltage 0.0 ma at mvdc K-274P-ST(40)-US/K-474P-ST(40)-US U-274P-ST-US/U-474P-ST-US Resistive load (cosφ = ) 0. A at 2 VAC; 2 A at 30 VDC Ag (Au-Alloy) 3 A 20 VAC, 220 VDC Max. switching current 2 A A Inductive load (cosφ = 0.4; L/R = 7 ms) 0.2 A at 2 VAC; A at 30 VDC Max. switching power 2 VA, 60 W 62. VA, 30 W Failure rate (reference value) (See note.) 0.0 ma at mvdc Note: P level: λ 60 = 0. x 6 /operation This value was measured at a switching frequency of 60 operations/min and the criterion of contact resistance is 0 Ω. This value may vary depending on the switching frequency and operating environment. Always double-check relay suitability under actual operating conditions. 2
Characteristics Contact resistance (See note.) Operate (set) time (See note 2.) Release (reset) time (See note 2.) Min. set/reset signal width Max. operating frequency Insulation resistance (See note 3.) Dielectric strength Note: Note: The data shown above are initial values.. The contact resistance was measured with ma at VDC with a voltage drop method. 2. Values in parentheses are actual values. 3. The insulation resistance was measured with a 00-VDC megohmmeter applied to the same parts as those used for checking the dielectric strength (except between the set and reset coil). Approved Standards 0 mω max. Single-side stable types: DPDT: ms max. (approx. 3 ms) : 7 ms max. (approx. 3. ms) Latching types: DPDT: ms max. (approx. 2. ms) : 7 ms max. (approx.approx. 3.3 ms) Single-side stable types: DPDT: 3 ms max. (approx..2 ms) : ms max. (approx..3 ms) Latching types: DPDT: ms max. (approx. 2. ms) : 7 ms max. (approx. 2.7 ms) DPDT: 7 ms min. : ms min. Mechanical: 36,000 operations/hr Electrical:,00 operations/hr (under rated load),000 MΩ min. (at 00 VDC); except for set-reset,000 VAC, 0/60 Hz for min between coil and contacts,000 VAC, 0/60 Hz for min between contacts of different polarity,000 VAC, 0/60 Hz for min between contacts of same polarity 20 VAC, 0/60 Hz for min between set and reset coils Impulse withstand voltage,00 V ( x 60 µs) (conforms to FCC Part 6) Vibration resistance Destruction: to to Hz, 2.-mm single amplitude (-mm double amplitude) Malfunction: to to Hz,.6-mm single amplitude (3.3-mm double amplitude) Shock resistance Destruction:,000 m/s 2 (approx. 0G) Malfunction: DPDT: 00 m/s 2 (approx. 0G), Latching type: 300 m/s 2 (approx. 30G) Endurance Ambient temperature Mechanical: 0,000,000 operations min. (at 36,000 operations/hr) Electrical: 00,000 operations min. (at,00 operations/hr) Operating: 40 C to 70 C (with no icing) Ambient humidity Operating: % to % Weight UL4, UL47 (File No. E4)/CSA C22.2 No.0, No.4 (File No. LR32) -274P-ST(40)-US K-274P-ST(40)-US U-274P-ST-US -474P-ST(40)-US K-474P-ST(40)-US U-474P-ST-US DPDT: Approx. 3. g : Approx. 6 g Model Contact form Coil ratings Contact ratings DPDT 3 to 4 VDC A, 2 VAC 2 A, 30 VDC A, 0 VDC A, 2 VAC 2 A, 30 VDC A, 0 VDC 3
Engineering Data Maximum Switching Power DPDT, Ambient Temperature vs. Maximum Coil Voltage Switching current (A) DC (L/R = 7 ms) AC (cosf = 0.4) DC resistive AC resistive Maximum coil voltage (%) DPDT: 360, 400 mw : 320, 360, 400 mw DPDT: 0,, 200 mw Note: The maximum coil voltage refers to the maximum value in a varying range of operating power voltage, not a continuous voltage. Switching voltage (V) Ambient temperature ( C) Endurance DPDT Endurance (x 6 operations) 0 0 20 3 0. 0. 0.0 0.03-274P 30 VDC, resistive -234P 30 VDC, resistive; -274P 30 VDC, 234P 2 VAC, -234P 2 VAC, resistive -274P 2 VAC, resistive; -234P 30 VDC, -274P 2 VAC, Life expectancy (x operations) 6 0 0 30 3 0. 0. 0.0 0.03-474P 30 VDC, resistive -434P 2 VAC, -434P 30 VDC, resistive, -434P 30 VDC, -474P 30 VDC, -434P 2 VAC, resistive -474P 2 VAC, Switching current (A) Switching current (A) 4
Dimensions Note:. All units are in millimeters unless otherwise indicated. 2. Orientation marks are indicated as follows: -274P-ST(40)-US 20.2 max. (20)*.4 max. + 6-4 3 6.0.0 Eight,.0-dia. holes -474P-ST-US 3.4 max. (3.2)*.4 max. 7 2 3 + - 4 6 3 4 6.0.0.0.0.0 Fourteen,.0-dia. holes K-274P-ST(40)-US 20.2 max. (20)*.4 max. + + 2 6- S R - 4 6 3 2.4.0.0.0 Ten, -dia. holes
K-474P-ST(40)-US 3.4 max. (3.2)*.4 max. 7 2 2 3 4 + + S R 6 - - 4 3 6.0.0.0 2.4.0.0.0 Sixteen,.0-dia. holes U-274P-ST-US 20.2 max. (20)*.4 max. 6 + - 6 S R - + 4 3.0.0 Eight,.0-dia. holes U-474P-ST-US 3.4 max. (3.2)*.4 max. 7 2 3 4 6 + - S R 4 - + 6 3.0.0.0.0.0 Fourteen,.0-dia. holes 6
Precautions Long-term Continuously ON Contacts Using the Relay in a circuit where the Relay will be ON continuously for long periods (without switching) can lead to unstable contacts because the heat generated by the coil itself will affect the insulation, causing a film to develop on the contact surfaces. We recommend using a latching relay (magnetic-holding relay) in this kind of circuit. If a single-side stable model must be used in this kind of circuit, we recommend using a fail-safe circuit design that provides protection against contact failure or coil burnout. Relay Handling When washing the product after soldering the Relay to a PCB, use a water-based solvent or alcohol-based solvent, and keep the solvent temperature to less than 40 C. Do not put the Relay in a cold cleaning bath immediately after soldering. ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.0337. To convert grams into ounces, multiply by 0.0327. Cat. No. K020-E-0 7