250R145

POLYFUSE® Resettable PTCs Radial Leaded 250R Series Description • The 250R series 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 • RoHS compliant and lead-free • Fast time-to-trip • Binned and sorted narrow resistance ranges available Applications • Customer Premises Equipment (CPE) • Central Office (CO)/ Telecom Centers • LAN/WAN Equipment • Access equipment • 0.08 – 0.18 Hold current range, 60VDC operating voltage • 250VAC interrupt rating Agency Approvals AGENCY AGENCY FILE NUMBER E183209 R50082521 Electrical Characteristics I hold (A) 0.08 0.08 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.145 0.145 0.145 0.145 0.18 0.18 C: coated device Part Number I trip (A) 0.16 0.16 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.29 0.29 0.29 0.29 0.65 0.65 Vmax Vint / Vop 250/60 250/60 250/60 250/60 250/60 250/60 250/60 250/60 250/60 250/60 250/60 250/60 250/60 250/60 250/60 250/60 I max (A) 3 3 3 3 3 3 3 3 3 3 3 3 3 3 10 10 Pd max. (W) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1.8 1.8 Maximum Time To Trip Current (A) 0.35 0.35 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Time (Sec.) 3 3 1.5 1.0 0.85 0.7 0.8 0.7 1 1.2 2.5 5 2.5 2.0 21 20 R min (Ω) 15 14 4 7 5.4 6 6 8 8 7 3 3 4.5 5.4 0.8 1.4 Resistance R typ (Ω) 22 22 8 9 7.5 10.5 9 10.5 10 12 6 5.5 6 7.5 2.2 3.9 R 1max (Ω) 33 33 16 16 14 16 16 16 16 16 14 12 14 14 4 4.5 Agency Approvals 250R080T 250R080 250R120 250R120-RA 250R120-RC 250R120-RF 250R120-R1 250R120-R2 250R120-R3 250R120T 250R145 250R145-RA 250R145-RB 250R145T 250R180 250R180T *typical value X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X T: pre-tripped device 250R Series Specifications are subject to change without notice.  Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse POLYFUSE® Resettable PTCs Radial Leaded Temperature Rerating Ambient Operation Temperature -40°C Part Number 250R080 250R080T 250R120 250R120T 250R145 250R145T 250R180 250R180T 0.12 0.12 0.18 0.18 0.26 0.26 0.28 0.28 250R Series -20°C 0°C 23°C 40°C Hold Current (A) 50°C 60°C 70°C 85°C 0.11 0.11 0.16 0.16 0.20 0.20 0.23 0.23 0.09 0.09 0.14 0.14 0.17 0.17 0.21 0.21 0.08 0.08 0.12 0.12 0.145 0.145 0.18 0.18 0.06 0.06 0.10 0.10 0.12 0.12 0.16 0.16 0.05 0.05 0.09 0.09 0.11 0.11 0.13 0.13 0.05 0.05 0.08 0.08 0.09 0.09 0.10 0.10 0.04 0.04 0.06 0.06 0.08 0.08 0.11 0.11 0.03 0.03 0.05 0.05 0.06 0.06 0.083 0.083 Average Time Current Curves 0.120A 0.145A 0.080A 0.180A Temperature Rerating Curve 170% 150% Percentage of Rated Current 130% 110% 90% 70% 50% 30% 10% 100000 10000 1000 TIME IN SECONDS 100 10 -40 -30 -20 -10 0 10 20 30 40 Temperature (°C) 50 60 70 80 1 0.100 0.010 0.001 0.02 0.100 1 10 100 CURRENT IN AMPERES Specifications are subject to change without notice. Note: 1.00 means the number one with two decimal places. AKL V3.9 06.05.18 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. 250R Series Specifications are subject to change without notice. 2 Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse POLYFUSE® Resettable PTCs Radial Leaded Agency Specification Selection Guide For Telecom and Networking Applications Product 250R120 250R145 250R180 Lightning ITU K.20/21/45 – 1.5kV 10/700μs ITU K.20/21/45 – 4kV 10/700μs* ITU K.20/21/45 – 1.5kV 10/700μs ITU K.20/21/45 – 4kV 10/700μs* Telcordia GR – 974 – 1.0kV 10/1000μs Power Cross ITU K.20/21/45 – 230Vac, 10Ω ITU K.20/21/45 – 600Vac, 600Ω ITU K.20/21/45 – 230Vac, 10Ω ITU K.20/21/45 – 600Vac, 600Ω Telcordia GR – 974- 283Vac, 10A *Devices should be independently evaluated and tested for use in any specific application Protection Application Guide Region/Specification Application *Access network equipment Remote terminal Repeaters WAN equipment Cross –connect Customer and IT equipment Analog modems ADSL, xDSL Phone sets, PBX systems Internet appliances POS terminals Central Office POTS/ISDN linecards T1/E1/J1 linecards ADSL/VDSL splitters CSU/DSU Device Selection 250R180 250R180T 250R145 250R145T 250R120 250R120T 250R180 250R180T 250R145 250R145T 250R120 250R120T 250R180 250R180T 250R145 250R145T 250R120 250R120T 250R180 250R180T 250R145 250R145T 250R120 250R120T 250R180 250R180T 250R145 250R145T 250R120 250R120T 250R080 South America/Asia/Europe ITU K.45 South America/Asia/Europe ITU K.21 South America/Asia/Europe ITU K.20 North America Telcordia GR-974 South America/Asia/Europe ITU K.20 North America Telcordia GR-1089 South America/Asia/Europe ITU K.20 and K.21 *Primary protection modules MDF modules Network interface *Intrabuilding communication systems LAN, VOIP cards Local loop handsets LAN Intrabuilding power cross Protection LAN equipment, IP phone *Resistance binned parts are recommended 250R Series Specifications are subject to change without notice.  Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse POLYFUSE® Resettable PTCs Radial Leaded Soldering Parameters - Wave Soldering Condition Peak Temp/ Duration Time > 220°C Preheat 140°C ~ 180°C Storage Condition Wave Soldering 260°C < 5 Sec 2 Sec ~ 20 Sec Temperature ( °C) 260 220 Soldering Cooling 180 Sec ~ 210 Sec 0°C~35°C < 70%RH • Recommended soldering methods: heat element oven or N2 environment for lead-free. • Devices are designed to be wave soldered to the bottom side of the board. • Devices can be cleaned using standard industry methods and solvents. • This profile can be used for lead-free device Note: If soldering temperatures exceed the recommended profile, devices may not meet the performance requirements. Soldering Parameters - Solder Reflow Condition Peak Temp/ Duration Time > 220°C Preheat 160°C ~ 190°C Storage Condition Reflow 260°C > 5 Sec 30 Sec ~ 60 Sec 190 160 Preheating 0 180 to 210 2 to 5 Time(s) 20-30 260 220 Temperature ( °C) Soldering Cooling 60 Sec ~ 90 Sec 0°C~35°C, < 70%RH • Recommended reflow methods: IR, vapor phase oven, hot air oven, N2 environment for lead-free. • Devices are not designed to be wave soldered to the bottom side of the board. • Devices can be cleaned using standard industry methods and solvents. Note: If reflow temperatures exceed the recommended profile, devices may not meet the performance requirements. Physical Specifications Lead Material Soldering Characteristics Insulating Material Device Labeling Tin-plated copper Solderability per MIL-STD-202, Method 208E Cured, flame retardant epoxy polymer meets UL94V-0 requirements. Marked with LF, voltage, current rating, and date code. 190 160 Preheating 0 60 to 90 30 to 60 Time(s) 120 Environmental Specifications Operating/Storage Temperature Maximum Device Surface Temperature in Tripped State Passive Aging Humidity Aging -40°C to +85°C 125°C 65°C/85°C, 1000 hours +85°C, 85%R.H. 1000 hours MIL-STD-202F Method 107G +125°C to -55°C 10 times MIL-STD-202, Method 215F Thermal Shock Solvent Resistance 250R Series Specifications are subject to change without notice.  Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse POLYFUSE® Resettable PTCs Radial Leaded Dimensions A Figure 1 C A Figure 2 C Marking B Marking B D D E F E F Figure  A B Inches Max. 0.39 Littelfuse Trademark Figure 2 C D E mm C Part Number 250R080 250R080T 250R120 250R120-RA 250R120-RC 250R120-RF 250R120-R1 D 250R120-R2 Figure 1 Inches mm Max. A 0.23 0.23 0.26 Max. C 5.8 5.8 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 9.5 9.5 mm Max. 9.9 080 XXXX Inches Max. 0.18 Voltage Rating Current Rating Date Code (Contact Littelfuse for additional information) mm Max. A 4.6 4.6 3.8 4.6 4.6 4.6 4.6 4.6 4.6 E 4.6 4.6 4.6 4.6 4.6 4.6 Inches Figure 2 Inches mm Min. 0.19 Littelfuse Trademark Physical Characteristics Lead (dia) Inches 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 mm 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 Typ. 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 F Min. 4.7 120 XXXX Typ. 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 Material Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Sn/Cu Figure 1 1 2 2 2 2 2 2 2 2 2 2 2 2 1 1 0.39 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.47 0.47 B 9.9 250 11 11 11 11 11 11 11 11 11 11 11 11 12 12 0.18 0.15 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 D 0.19 0.19 0.19 0.19 0.19 0.19 0.19 0.19 0.19 0.19 0.19 0.19 0.19 0.19 4.7 250 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 B Marking 0.26 0.26 0.26 0.26 0.26 0.26 Marking 0.19 4.6 Voltage Rating Current Rating Date Code (Contact Littelfuse for additional information) 250R120-R3 250R120T 250R145 250R145-RA 250R145-RB 250R145T 250R180 250F180T E 0.26 0.26 0.26 0.26 0.26 0.37 0.37 F Part Marking System 250 250 Littelfuse Trademark 080 XXXX Voltage Rating Current Rating Date Code (Contact Littelfuse for additional information) Littelfuse Trademark 120 XXXX Voltage Rating Current Rating Date Code (Contact Littelfuse for additional information) 250R Series Specifications are subject to change without notice. 5 Electronics Designers Guide www.littelfuse.com ©2006 Littelfuse POLYFUSE® Resettable PTCs Radial Leaded Part Numbering System 250 R 120 - RA Z R PACKAGING STYLE BLANK: Bulk R: Tape & Ammo SERIES QUANTITY CODE: M=1000 U=500 Z=1200 Rx: Resistance Range (x = A-Z or 1-9) [not applicable for all parts] T: PRE-TRIPPED DEVICE (OPTIONAL) I HOLD CURRENT CODE (SEE TABLE BELOW) R: RADIAL PEAK VOLTAGE RATING Packaging I hold (A) 0.080 0.120 0.145 0.180 I hold Code 080 120 145 180 Packaging Option Bulk Tape and Ammo Bulk Tape and Ammo Bulk Tape and Ammo Bulk Tape and Ammo Quantity 500 1500 500 1200 500 1200 200 1000 Quantity & Packaging Codes U DR U ZR U ZR F MR 250R Series Specifications are subject to change without notice.  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