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
RHEF450 PTC RESET FUSE 16V 4.5A RADIAL Littelfuse Inc.	248	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RHEF	Bag	Active	Polymeric	16V	4.5 A	7.8 A	100 A	3 s	22 mOhms	54 mOhms	-	-40°C ~ 125°C	-	-	-	Through Hole	0.409" L x 0.118" W (10.40mm x 3.00mm)	0.614" (15.60mm)	-	0.199" (5.05mm)
RHEF300 PTC RESET FUSE 16V 3A RADIAL Littelfuse Inc.	470	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RHEF	Bag	Active	Polymeric	16V	3 A	6 A	100 A	5 s	33 mOhms	79 mOhms	-	-40°C ~ 125°C	-	-	-	Through Hole	0.350" Dia x 0.118" T (8.90mm x 3.00mm)	0.543" (13.80mm)	-	0.199" (5.05mm)
2920L050/72DR POLYSWITCH RESETTABLE PPTC Littelfuse Inc.	321	-	RFQ	Datasheet	2920 (7351 Metric), Concave	POLY-FUSE®, 2920L	Tape & Reel (TR)	Active	Polymeric	72V	500 mA	1 A	10 A	5 s	300 mOhms	1.5 Ohms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.290" L x 0.202" W (7.36mm x 5.12mm)	-	0.049" (1.25mm)	-
TRF250-080T PTC RESET FUSE 60V 80MA RADIAL Littelfuse Inc.	740	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, TRF250	Bag	Active	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)	-	0.197" (5.00mm)
LVR040K PTC RESET FUSE 240V 400MA RADIAL Littelfuse Inc.	362	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, LVR	Bag	Active	Polymeric	240V (265V Int)	400 mA	900 mA	5.5 A	24 s	600 mOhms	1.9 Ohms	-	-20°C ~ 85°C	-	-	-	Through Hole	0.453" L x 0.150" W (11.50mm x 3.80mm)	0.823" (20.90mm)	-	0.200" (5.08mm)
RKEF375 PTC RESET FUSE 60V 3.75A RADIAL Littelfuse Inc.	896	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RKEF	Bag	Active	Polymeric	60V	3.75 A	7.5 A	40 A	22 s	17 mOhms	60 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.650" L x 0.118" W (16.50mm x 3.00mm)	0.992" (25.20mm)	-	0.199" (5.05mm)
PICOASMDCH010F-2 PTC RESET FUSE 16V 100MA 0805 Littelfuse Inc.	681	-	RFQ	Datasheet	0805 (2012 Metric), Concave	PolySwitch®, picoASMD	Tape & Reel (TR)	Active	Polymeric	16V	100 mA	600 mA	40 A	1.5 s	1 Ohms	10 Ohms	-	-40°C ~ 125°C	Automotive	AEC-Q200	-	Surface Mount	0.083" L x 0.055" W (2.10mm x 1.40mm)	-	0.031" (0.78mm)	-
30R110UPR PTC RESET FUSE 30V 1.1A RADIAL Littelfuse Inc.	289	-	RFQ	Datasheet	Radial, Disc	POLY-FUSE®, 30R	Cut Tape (CT)	Active	Polymeric	30V	1.1 A	2.2 A	40 A	6.6 s	50 mOhms	170 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.291" L x 0.118" W (7.40mm x 3.00mm)	0.559" (14.20mm)	-	0.201" (5.10mm)
2920L150/60MR POLYSWITCH RESETTABLE PPTC Littelfuse Inc.	297	-	RFQ	Datasheet	2920 (7351 Metric), Concave	POLY-FUSE®, 2920L	Tape & Reel (TR)	Active	Polymeric	60V	1.5 A	3 A	20 A	5 s	70 mOhms	250 mOhms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.290" L x 0.202" W (7.36mm x 5.12mm)	-	0.071" (1.80mm)	-
RUEF600-2 PTC RESET FUSE 30V 6A RADIAL Littelfuse Inc.	1,002	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RUEF	Tape & Reel (TR)	Active	Polymeric	30V	6 A	12 A	100 A	16 s	5 mOhms	40 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.650" L x 0.118" W (16.50mm x 3.00mm)	0.949" (24.10mm)	-	0.400" (10.15mm)

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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.