POLY-FUSE Resettable PTCs Radial Leaded > 250R Series

Transcription

1 Radial Leaded > Description The is designed to protect against short duration high voltage fault currents (power cross or power induction surge) typically found in telecom applications (250Vrms). The series can be used to help telecom networking equipment meet the protection requirements specified in ITU K.20 and K.21. Features Agency Approvals AGENCY AGENCY FILE NUMBER E R range, 60VDC operating voltage Applications Equipment (CPE) telecom centers resistance ranges available Electrical Characteristics Part Number I trip V max V int / V op I max P d typ. (W) Maximum Time To Trip Current Time (Sec.) R min (Ω) Resistance R typ (Ω) R 1max (Ω) Agency Approvals 250R / X X 250R080T / X X / X X -RA / X X -RC / X X -RF / X X -R / X X -R / X X -R / X X T / X X / X X -RA / X X -RB / X X T / X X / X X T / X X Items with T at end of part number = pre-tripped device. See Part Ordering Number System section of this data sheet for additional information. I trip V int V op = The device regular operation voltage I ) P d Littelfuse, Inc R min = Minimum resistance of device in initial (un-soldered) state. R typ = Typical resistance of device in initial (un-soldered) state. R Caution: Operation beyond the specified rating may result in damage and possible arcing and flame.

2 Radial Leaded > Temperature Rerating Ambient Operation Temperature Part Number Hold Current 250R R080T T T T Average Time Current Curves Temperature Rerating Curve A 0.120A 0.145A 0.180A 250R Percentage of Rated Current 170% 150% 130% 110% 90% 70% 50% Time in Seconds % 10% Temperature ( C) Current in Amperes The average time current curves and Temperature Rerating curve performance is affected by a number or variables, and these curves provided as guidance only. Customer must verify the performance in their application Littelfuse, Inc.

3 Radial Leaded > Agency Specification Selection Guide For Telecom and Networking Applications Product Lightning Power Cross Protection Application Guide Region/Specification Application Device Selection T Remote terminal Repeaters ITU K.45 T T ITU K.21 ITU K.20 North America Telcordia GR-974 ITU K.20 North America Telcordia GR-1089 ITU K.20 and K.21 Customer and IT equipment Analog modems Phone sets, PBX systems Internet appliances POS terminals Central Office POTS/ISDN linecards CSU/DSU MDF modules Network interface Protection T T T T T T T T T T T T 250R Littelfuse, Inc

4 Radial Leaded > Soldering Parameters - Wave Soldering Condition Peak Temp/ Duration Time < 5 Sec > 220 C 2 Sec ~ 20 Sec Preheat 140 C ~ 180 C 180 Sec ~ 210 Sec Storage Condition < N 2 environment for lead-free. Temperature ( C) Preheating Soldering Cooling side of the board. and solvents to to 5 Time(s) Note: profile, devices may not meet the performance requirements. Physical Specifications Environmental Specifications Lead Material Tin-plated Copper Operating/Storage Temperature Soldering Characteristics Method 208E Maximum Device Surface Temperature in Tripped State Insulating Material Passive Aging Device Labeling and date code. Humidity Aging Thermal Shock Solvent Resistance Moisture Sesitivity Level Littelfuse, Inc.

5 Radial Leaded > Dimensions Part Marking System A C A C B B Littelfuse Trademark XXXX Voltage Rating Littelfuse Current Rating Trademark Date Code (Contact Littelfuse for additional information) XXXX Voltage Rating Current Rating Date Code (Contact Littelfuse for additional information) D D E F E F Figure 1 Figure 2 A B C D E Physical Characteristics Part Number Figure Inches mm Inches mm Inches mm Inches mm Inches mm Lead (dia) Max. Max. Max. Max. Max. Max. Min. Min. Typ. Typ. Inches mm Material 250R Sn/Cu 250R080T Sn/Cu Sn/Cu -RA Sn/Cu -RC Sn/Cu -RF Sn/Cu -R Sn/Cu -R Sn/Cu -R Sn/Cu T Sn/Cu Sn/Cu -RA Sn/Cu -RB Sn/Cu T Sn/Cu Sn/Cu T Sn/Cu Littelfuse, Inc

6 Radial Leaded > Part Ordering Number System 250 R RA Z R SERIES R: RADIAL PACKAGING STYLE QUANTITY CODE: F=200 M=1000 U=500 Z=1200 T: PRE-TRIPPED DEVICE (OPTIONAL) I HOLD CURRENT CODE (Refer to Packaging or Electrical Characteristics tables) PEAK VOLTAGE RATING BLANK: Bulk R: Tape & Ammo Rx: Resistance Range (x = A-Z or 1-9) [not applicable for all parts] Packaging Part Number 250R R080T -RA -RC -RF -R1 -R2 -R3 T -RA -RB T T Ordering Number Code Packaging Option Quantity Quantity & Packaging Codes 250R080U R080ZR Tape and Ammo 1200 ZR 250R080TU R080TZR Tape and Ammo 1200 ZR U ZR Tape and Ammo 1200 ZR -RAU -RAZR Tape and Ammo 1200 ZR -RCU -RCZR Tape and Ammo 1200 ZR -RFU -RFZR Tape and Ammo 1200 ZR -R1U -R1ZR Tape and Ammo 1200 ZR -R2U -R2ZR Tape and Ammo 1200 ZR -R3U -R3ZR Tape and Ammo 1200 ZR TU TZR Tape and Ammo 1200 ZR U ZR Tape and Ammo 1200 ZR -RAU -RAZR Tape and Ammo 1200 ZR -RBU -RBZR Tape and Ammo 1200 ZR TU TZR Tape and Ammo 1200 ZR F Bulk 200 F MR Tape and Ammo 1000 MR TF Bulk 200 F TMR Tape and Ammo 1000 MR Littelfuse, Inc.

7 Radial Leaded > Tape and Ammo Specifications Devices taped using EIA468-B/IE286-2 standards. See table below and Figure 1 for details. Dimension EIA Mark IEC Mark Dimensions Dim. (mm) Tol. (mm) Carrier tape width W W 18 W 4 W 0 11 min. Top distance between tape edges W 6 W 2 3 Sprocket hole position W 5 W 1 9 D 0 D 0 4 Abscissa to plane (straight lead) H H 18.5 Abscissa to plane (kinked lead) H 0 H 0 16 Abscissa to top H 1 H Overall width without lead protrusion C Overall width with lead protrusion C L 1 l Protrusion of cut out L L 11 l 2 l 2 Not specified P 0 P P 0 P Pitch tolerance 20 consecutive Tape thickness t t 0.9 Tape thickness with splice t Splice sprocket hole alignment 0 Body lateral deviation Δh Δh 0 Body tape plane deviation Δp Δp 0 P 1 P F F 5.1 Tape and Ammo Diagram Δh Δh Figure 1 Δh Δp Reference plane H 1 L A 1 A B F H 0 W W 5 4 W H H 1 C 1 C 2 I 2 L 1 P 0 D 0 Direction of unreeling Cross section A - B t Littelfuse, Inc