PTC Resettable Fuses

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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
250R120-RCZR PTC RESET FUSE 60V 120MA RADIAL Littelfuse Inc.	5,407	-	RFQ	Datasheet	Radial, Disc	POLY-FUSE®, 250R	Cut Tape (CT)	Active	Polymeric	60V (250V Int)	120 mA	240 mA	3 A	3 s	5.4 Ohms	14 Ohms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.256" L x 0.181" W (6.50mm x 4.60mm)	0.433" (11.00mm)	-	0.201" (5.10mm)
2920L600/12MR-A PTC RESET FUSE 12V 6A 2920 Littelfuse Inc.	2,367	-	RFQ	Datasheet	2920 (7351 Metric), Concave	POLY-FUSE®, 2920L	Tape & Reel (TR)	Active	Polymeric	12V	6 A	12 A	50 A	2 s	4 mOhms	20 mOhms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.290" L x 0.202" W (7.36mm x 5.12mm)	-	0.063" (1.60mm)	-
AHRF600-2 PTC RESET FUSE 16V 6A RADIAL Littelfuse Inc.	1,998	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, AHRF	Tape & Reel (TR)	Active	Polymeric	16V	6 A	12 A	100 A	6.5 s	10 mOhms	32 mOhms	-	-40°C ~ 125°C	Automotive	AEC-Q200	-	Through Hole	0.441" L x 0.118" W (11.20mm x 3.00mm)	0.827" (21.00mm)	-	0.200" (5.08mm)
MICROASMDCH150F-2 PPTC-MINI-PSW Littelfuse Inc.	1,215	-	RFQ	Datasheet	1210 (3225 Metric), Concave	PolySwitch®, microASMD	Tape & Reel (TR)	Active	Polymeric	12V	1.5 A	4.5 A	40 A	1 s	25 mOhms	250 mOhms	-	-40°C ~ 85°C	Automotive	AEC-Q200	-	Surface Mount	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.055" (1.40mm)	-
TRF250-145T-B-0.5 PTC RESET FUSE 60V 145MA RADIAL Littelfuse Inc.	1,970	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, TRF250	Bag	Active	Polymeric	60V (250V Int)	145 mA	290 mA	3 A	2.5 s	5.4 Ohms	14 Ohms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.256" L x 0.181" W (6.50mm x 4.60mm)	0.433" (11.00mm)	-	0.197" (5.00mm)
LSP550 PTC RESET FUSE 16V 5.5A Littelfuse Inc.	9,778	-	RFQ	Datasheet	Strap	PolySwitch®, LSP	Bag	Active	Polymeric	16V	5.5 A	10.2 A	50 A	5 s	8 mOhms	26 mOhms	13 mOhms	-40°C ~ 85°C	Automotive	AEC-Q200	-	User Defined	0.787" L x 0.402" W (20.00mm x 10.20mm)	-	0.035" (0.90mm)	-
AHRL700 PTC RESET FUSE 7A 16V RAD Littelfuse Inc.	138	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, AHRL	Bulk	Active	Polymeric	16V	7 A	14 A	100 A	6.8 s	8.5 mOhms	14 mOhms	-	-40°C ~ 125°C	Automotive	AEC-Q200	-	Through Hole	0.465" L x 0.118" W (11.80mm x 3.00mm)	0.685" (17.40mm)	-	0.199" (5.05mm)
RXEF300K PTC RESET FUSE 72V 3A RADIAL Littelfuse Inc.	362	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RXEF	Bag	Active	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 0.118" T (23.11mm x 3.00mm)	1.154" (29.30mm)	-	0.400" (10.15mm)
AGRF800-2 PTC RESET FUSE 16V 8A RADIAL Littelfuse Inc.	234	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, AGRF	Tape & Reel (TR)	Active	Polymeric	16V	8 A	15 A	100 A	5.5 s	4.9 mOhms	17.5 mOhms	-	-40°C ~ 85°C	Automotive	AEC-Q200	-	Through Hole	0.500" L x 0.118" W (12.70mm x 3.00mm)	0.874" (22.20mm)	-	0.199" (5.05mm)
TRF600-150S-2 PTC RESET FUSE 250V 150MA RADIAL Littelfuse Inc.	635	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, TRF600	Tape & Reel (TR)	Active	Polymeric	250V (600V Int)	150 mA	300 mA	40 A	4 s	6 Ohms	17 Ohms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.354" L x 0.181" W (9.00mm x 4.60mm)	0.492" (12.50mm)	-	0.197" (5.00mm)

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FREQUENTLY ASKED QUESTIONS

PTC Resettable Fuses FAQ

Common questions about filtering, comparing and sourcing PTC Resettable Fuses components.

How can I narrow the PTC Resettable Fuses selection?

Use the available manufacturer and technical parameter filters to reduce the product list. Compare the remaining part numbers against your electrical, package and application requirements.

Should I confirm the datasheet before selecting a part?

Yes. Always review the manufacturer datasheet to confirm ratings, package, operating conditions and other technical details before finalizing a component for your design.

Can Winsun (HK) Electronics help source a specific PTC Resettable Fuses part number?

Yes. Send the exact manufacturer part number and required quantity for availability, lead-time and quotation support.

Do you support BOM, shortage or alternative-part requirements?

Yes. You can submit a BOM or shortage list for sourcing assistance. Where appropriate, our team can also help review possible alternative-part options.