PTC Resettable Fuses

Manufacturer Package/Case Series Packaging Product Status Type Voltage - Max Current - Hold (Ih) (Max) Current - Trip (It) Current - Max Time to Trip Resistance - Initial (Ri) (Min) Resistance - Post Trip (R1) (Max) Resistance - 25°C (Typ) Operating Temperature Grade Qualification Ratings Mounting Type Size / Dimension Height - Seated (Max) Thickness (Max) Lead Spacing






















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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Photo Mfr. Part # Availability Price Quantity Datasheet Package/Case Series Packaging Product Status Type Voltage - Max Current - Hold (Ih) (Max) Current - Trip (It) Current - Max Time to Trip Resistance - Initial (Ri) (Min) Resistance - Post Trip (R1) (Max) Resistance - 25°C (Typ) Operating Temperature Grade Qualification Ratings Mounting Type Size / Dimension Height - Seated (Max) Thickness (Max) Lead Spacing
72R025XU Littelfuse Inc.

72R025XU

PTC RESET FUSE 72V 250MA RADIAL

Littelfuse Inc.

8,003
RFQ
72R025XU Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 72R Bulk Obsolete Polymeric 72V 250 mA 500 mA 40 A 2.5 s 1.25 Ohms 3 Ohms - -40°C ~ 85°C - - - Through Hole 0.291" Dia x 0.122" T (7.40mm x 3.10mm) 0.500" (12.70mm) - 0.201" (5.10mm)
72R030XU Littelfuse Inc.

72R030XU

PTC RESET FUSE 72V 300MA RADIAL

Littelfuse Inc.

4,255
RFQ
72R030XU Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 72R Bulk Obsolete Polymeric 72V 300 mA 600 mA 40 A 3 s 880 mOhms 2.1 Ohms - -40°C ~ 85°C - - - Through Hole 0.291" Dia x 0.122" T (7.40mm x 3.10mm) 0.500" (12.70mm) - 0.201" (5.10mm)
72R040XU Littelfuse Inc.

72R040XU

PTC RESET FUSE 72V 400MA RADIAL

Littelfuse Inc.

3,265
RFQ
72R040XU Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 72R Bulk Obsolete Polymeric 72V 400 mA 800 mA 40 A 3.8 s 550 mOhms 1.29 Ohms - -40°C ~ 85°C - - - Through Hole 0.299" Dia x 0.122" T (7.60mm x 3.10mm) 0.532" (13.50mm) - 0.201" (5.10mm)
72R050XU Littelfuse Inc.

72R050XU

PTC RESET FUSE 72V 500MA RADIAL

Littelfuse Inc.

9,559
RFQ
72R050XU Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 72R Bulk Obsolete Polymeric 72V 500 mA 1 A 40 A 4 s 500 mOhms 1.17 Ohms - -40°C ~ 85°C - - - Through Hole 0.311" Dia x 0.122" T (7.90mm x 3.10mm) 0.539" (13.70mm) - 0.201" (5.10mm)
72R065XU Littelfuse Inc.

72R065XU

PTC RESET FUSE 72V 650MA RADIAL

Littelfuse Inc.

4,000
RFQ
72R065XU Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 72R Bulk Obsolete Polymeric 72V 650 mA 1.3 A 40 A 5.3 s 310 mOhms 720 mOhms - -40°C ~ 85°C - - - Through Hole 0.370" Dia x 0.122" T (9.40mm x 3.10mm) 0.571" (14.50mm) - 0.201" (5.10mm)
72R075XU Littelfuse Inc.

72R075XU

PTC RESET FUSE 72V 750MA RADIAL

Littelfuse Inc.

5,324
RFQ
72R075XU Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 72R Bulk Obsolete Polymeric 72V 750 mA 1.5 A 40 A 6.3 s 250 mOhms 600 mOhms - -40°C ~ 85°C - - - Through Hole 0.402" Dia x 0.122" T (10.20mm x 3.10mm) 0.598" (15.20mm) - 0.201" (5.10mm)
72R090XU Littelfuse Inc.

72R090XU

PTC RESET FUSE 72V 900MA RADIAL

Littelfuse Inc.

4,620
RFQ
72R090XU Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 72R Bulk Obsolete Polymeric 72V 900 mA 1.8 A 40 A 7.2 s 200 mOhms 470 mOhms - -40°C ~ 85°C - - - Through Hole 0.441" Dia x 0.122" T (11.20mm x 3.10mm) 0.622" (15.80mm) - 0.201" (5.10mm)
72R185XF Littelfuse Inc.

72R185XF

PTC RESET FUSE 72V 1.85A RADIAL

Littelfuse Inc.

5,128
RFQ
72R185XF Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 72R Bulk Obsolete Polymeric 72V 1.85 A 3.7 A 40 A 12.6 s 80 mOhms 190 mOhms - -40°C ~ 85°C - - - Through Hole 0.660" Dia x 0.122" T (16.76mm x 3.10mm) 0.906" (23.00mm) - 0.201" (5.10mm)
72R300XF Littelfuse Inc.

72R300XF

PTC RESET FUSE 72V 3A RADIAL

Littelfuse Inc.

9,782
RFQ
72R300XF Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 72R Bulk Obsolete Polymeric 72V 3 A 6 A 40 A 19.8 s 40 mOhms 100 mOhms - -40°C ~ 85°C - - - Through Hole 0.910" Dia x 0.122" T (23.11mm x 3.10mm) 1.154" (29.30mm) - 0.402" (10.20mm)
AHRF550S Littelfuse Inc.

AHRF550S

PTC RESET FUSE 16V 5.5A RADIAL

Littelfuse Inc.

7,528
RFQ
AHRF550S Datasheet

Datasheet

Radial, Disc PolySwitch®, AHRF Bag Active Polymeric 16V 5.5 A 10 A 100 A 6 s 13 mOhms 37 mOhms - -40°C ~ 125°C Automotive AEC-Q200 - Through Hole 0.441" L x 0.118" W (11.20mm x 3.00mm) 0.744" (18.90mm) - 0.200" (5.08mm)
LR4-1300F Littelfuse Inc.

LR4-1300F

PTC RESET FUSE 20V 13A STRAP

Littelfuse Inc.

6,292
RFQ

-

Strap PolySwitch®, LR4 Bag Active Polymeric 20V 13 A 21.2 A 100 A 10 s 3.5 mOhms 9 mOhms - -40°C ~ 85°C - - - User Defined 2.520" L x 0.382" W (64.00mm x 9.70mm) - - -
LR4-190XF Littelfuse Inc.

LR4-190XF

PTC RESET FUSE 15V 1.9A STRAP

Littelfuse Inc.

6,877
RFQ

-

Strap PolySwitch®, LR4 Bag Active Polymeric 15V 1.9 A 3.9 A 100 A 5 s 39 mOhms 102 mOhms - -40°C ~ 85°C - - - User Defined 0.648" L x 0.283" W (16.45mm x 7.20mm) - 0.039" (1.00mm) -
LR4-550RAF Littelfuse Inc.

LR4-550RAF

PTC RESET FUSE 20V 5.5A STRAP

Littelfuse Inc.

5,509
RFQ

-

Strap PolySwitch®, LR4 Bag Active Polymeric 20V 5.5 A 10.5 A 100 A 5 s 9 mOhms 22 mOhms - -40°C ~ 85°C - - - User Defined - - - -
TRF250-180-0.125 Littelfuse Inc.

TRF250-180-0.125

POLYSWITCH PTC RESET 0.180A T/H

Littelfuse Inc.

4,914
RFQ
TRF250-180-0.125 Datasheet

Datasheet

Radial, Disc PolySwitch® Bag Active - 100V 180 mA 650 mA 10 A 2 s - - - - - - - Through Hole 0.350" Dia x 0.150" W (8.89mm x 3.81mm) 0.472" (12.00mm) - 0.200" (5.08mm)
TRF250-183S-0.110 Littelfuse Inc.

TRF250-183S-0.110

PTC RESET FUSE 100V 183MA RADIAL

Littelfuse Inc.

6,046
RFQ
TRF250-183S-0.110 Datasheet

Datasheet

Radial, Disc PolySwitch®, TRF250 Bag Active Polymeric 100V (250V Int) 183 mA 685 mA 10 A 1.8 s 800 mOhms 3.4 Ohms - -40°C ~ 85°C - - - Through Hole 0.295" Dia x 0.150" T (7.50mm x 3.80mm) 0.374" (9.50mm) - 0.200" (5.08mm)
250R080TU Littelfuse Inc.

250R080TU

PTC RESET FUSE 60V 80MA RADIAL

Littelfuse Inc.

5,485
RFQ
250R080TU Datasheet

Datasheet

Radial, Disc POLY-FUSE®, 250R Bulk Obsolete Polymeric 60V (250V Int) 80 mA 160 mA 3 A 4 s 15 Ohms 33 Ohms - -40°C ~ 85°C - - - Through Hole 0.228" Dia x 0.181" T (5.80mm x 4.60mm) 0.390" (9.90mm) - 0.201" (5.10mm)
MF-R015/600-0 Bourns Inc.

MF-R015/600-0

PTC RESET FUSE 250V 150MA RADIAL

Bourns Inc.

7,290
RFQ
MF-R015/600-0 Datasheet

Datasheet

Radial, Box Multifuse®, MF-R/600 Bulk Obsolete Polymeric 250V (600V Int) 150 mA 300 mA 3 A 5 s 6 Ohms 22 Ohms - -40°C ~ 85°C - - - Through Hole 0.531" L x 0.236" W (13.50mm x 6.00mm) 0.496" (12.60mm) - 0.197" (5.00mm)
MF-R016/600-0 Bourns Inc.

MF-R016/600-0

PTC RESET FUSE 250V 160MA RADIAL

Bourns Inc.

9,995
RFQ
MF-R016/600-0 Datasheet

Datasheet

Radial, Box Multifuse®, MF-R/600 Bulk Obsolete Polymeric 250V (600V Int) 160 mA 320 mA 3 A 7 s 4 Ohms 18 Ohms - -40°C ~ 85°C - - - Through Hole 0.630" L x 0.236" W (16.00mm x 6.00mm) 0.496" (12.60mm) - 0.197" (5.00mm)
YS5876PTF Amphenol Advanced Sensors (Thermometrics)

YS5876PTF

PTC RESET FUSE 240V 100MA RADIAL

Amphenol Advanced Sensors (Thermometrics)

2,107
RFQ
YS5876PTF Datasheet

Datasheet

Radial, Disc PTF Bulk Active Ceramic 240V 100 mA 210 mA - - - - 50 Ohms 10°C ~ 55°C - - - Through Hole 0.650" Dia x 0.272" T (16.50mm x 6.90mm) 0.650" (16.50mm) - 0.331" (8.40mm)
MXP190BB Littelfuse Inc.

MXP190BB

PTC RESET FUSE 6V 1.9A STRAP

Littelfuse Inc.

2,549
RFQ
MXP190BB Datasheet

Datasheet

Strap PolySwitch®, MXP Bag Obsolete Polymeric 6V 1.9 A 4.9 A 50 A 2 s 7 mOhms 24 mOhms - - - - - User Defined 0.394" L x 0.122" W (10.00mm x 3.11mm) - 0.043" (1.10mm) -
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PTC Resettable Fuses Electronic Components Sourcing and Lifecycle Support

FPGAX is a global sourcing partner specializing in FPGA and programmable logic solutions for engineering and manufacturing organizations worldwide. For customers sourcing PTC Resettable Fuses components, we support both current production requirements and long-term component availability across demanding product lifecycles.

Our sourcing approach combines traceability, supply stability, and technical coordination. FPGAX is certified to AS9120B, ISO 9001:2008, and ISO 14001 standards and supports procurement programs where continuity, documentation, and dependable component supply are important.

How FPGAX Supports PTC Resettable Fuses Requirements

  • Active component sourcing: support for current FPGA, programmable logic, and related semiconductor requirements.
  • End-of-life sourcing: assistance with obsolete and hard-to-find parts when designs must remain in production.
  • Lifecycle management: sourcing support during product transitions, allocation periods, and supply interruptions.
  • Design continuity: long-term supply support intended to reduce redesign pressure and production disruption.
  • Major programmable logic brands: sourcing coverage includes Xilinx, Intel/Altera, Lattice, Microchip, and QuickLogic.

Supply Support at a Glance

Requirement FPGAX Support
Current production Active FPGA, programmable logic, and semiconductor component sourcing
Legacy programs End-of-life and hard-to-find component sourcing
Supply continuity Lifecycle transition and long-term availability support
Quality requirements Traceable sourcing and quality-management processes

Focused on FPGA and Programmable Logic Supply

FPGAX focuses on helping customers maintain access to critical programmable devices throughout the full component lifecycle. Whether the requirement is for a current design, an established production program, or an older platform facing component obsolescence, our goal is to provide a stable sourcing path and help customers maintain design and manufacturing continuity.

PTC Resettable Fuses FAQ

Can FPGAX source both active and end-of-life PTC Resettable Fuses components?

Yes. FPGAX supports sourcing for both active components and end-of-life or hard-to-find parts, with an emphasis on maintaining supply continuity for engineering and manufacturing programs.

Which programmable logic manufacturers does FPGAX support?

Our core sourcing coverage includes major FPGA and programmable logic manufacturers such as Xilinx, Intel/Altera, Lattice, Microchip, and QuickLogic, subject to specific part requirements and availability.

How does FPGAX help with component lifecycle changes?

We support customers through lifecycle transitions by helping locate current or legacy supply, reducing exposure to supply disruptions, and supporting long-term availability for designs that need to remain in production.

What quality and traceability standards does FPGAX follow?

FPGAX states certification to AS9120B, ISO 9001:2008, and ISO 14001 standards. Our sourcing services are structured around traceability, stable supply, and quality-management requirements.

What information should I provide for a PTC Resettable Fuses sourcing request?

Providing the manufacturer part number, required quantity, target delivery schedule, and any lifecycle or traceability requirements helps us evaluate the sourcing request more efficiently.