RS-485 ESD, Lightning, & Power Fault Protection

Littelfuse RS-485 ESD, Lightning, and Power Fault Protection feature polymeric positive temperature coefficients (PPTCs) that can protect against short circuit and power crosses. The RS-485 product line includes the resettable PPTCs, TVS diodes, GDTs, and SIDACtor series. The TVS Diode Arrays and SM712 series are specifically designed to protect RS-485 applications from ESD, EFT, and lightning-induced surges. When lightning occurs, the SIDACtor will react by causing voltage to increase across PPTC until GDT fires. 

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Qty. RoHS ECAD Model Series
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Current Rating - Max
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Maximum Operating Temperature
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Littelfuse Resettable Fuses - PPTC 250V 3A 10Ohms
Datasheet
255In Stock
Min.: 1
Mult.: 1

TRF600 PCB Mount Radial 150 mA 250 VDC 300 mA 3 A 17 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC Polyswitch 0.13A
Datasheet
31.219In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.200

TSV250 PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 12 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .15A 250Vdc 3A RMS INTER
Datasheet
10.640In Stock
Min.: 1
Mult.: 1

TRF600 PCB Mount Radial 150 mA 250 VDC 300 mA 3 A 17 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 600V .15A-HD 3A MAX
Datasheet
22.271In Stock
Min.: 1
Mult.: 1
: 1.500

TRF600 PCB Mount Radial 150 mA 250 VDC 300 mA 3 A 17 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC .15A 250Vdc 600Vrms
Datasheet
6.275In Stock
1.500Expected 7/30/2026
Min.: 1
Mult.: 1
: 1.500

TRF600 PCB Mount Radial 150 mA 250 VDC 300 mA 3 A 17 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC Polyswitch 0.26A
Datasheet
3.965In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

TS250 PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 20 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .12A 60VDC 250VRMS
Datasheet
2.888In Stock
7.000Expected 10/8/2026
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 250V .12A-HD 3A MAX
Datasheet
2.654In Stock
Min.: 1
Mult.: 1
: 1.500

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 16 Ohms 3 A 60 V - 40 C+ 85 C
Datasheet
74In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 V 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .12A 60Vdc MAX 250Vrms
Datasheet
500In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .12A 250V
Datasheet
2.565In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 16 Ohms 3 A 60 VDC - 40 C+ 85 C
Datasheet
363In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 600V .15A-HD 3A MAX
Datasheet
494In Stock
1.500Expected 7/30/2026
Min.: 1
Mult.: 1

TRF600 PCB Mount Radial 130 mA 250 VDC 300 mA 3 A 22 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC Polyswitch 0.26A Restive Range -2
Datasheet
1.120In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

TS250 PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 15 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC Polyswitch 0.26A
Datasheet
70In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

TS250 PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 20 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .12A 250V
Datasheet
1.500Expected 10/8/2026
Min.: 1
Mult.: 1
: 1.500

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 60V 3A 8Ohms
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 10.000
Mult.: 500

TRF250 PCB Mount Radial 120 mA 60 V 240 mA 3 A 8 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V 3A 8Ohms
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 10.000
Mult.: 500

TRF250 PCB Mount Radial 120 mA 60 V 240 mA 3 A 8 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .12A 250V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1
: 1.500

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 250V .12A-HD 3A MAX
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V 3A 10Ohms
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 V 240 mA 10 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 16 Ohms 3 A 60 V - 40 C+ 85 C
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 V 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V 3A 10Ohms
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1
: 1.500

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 10 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 V 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 250V .12A-HD 3A MAX
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk