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
30R090UU PTC RESET FUSE 30V 900MA RADIAL Littelfuse Inc.	4,225	-	RFQ	Datasheet	Radial, Disc	POLY-FUSE®, 30R	Bulk	Active	Polymeric	30V	900 mA	1.8 A	40 A	5.9 s	70 mOhms	220 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.291" L x 0.118" W (7.40mm x 3.00mm)	0.480" (12.20mm)	-	0.201" (5.10mm)
RXEF050-1 PTC RESET FUSE 72V 500MA RADIAL Littelfuse Inc.	5,884	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RXEF	Bag	Active	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 0.118" T (7.90mm x 3.00mm)	0.539" (13.70mm)	-	0.199" (5.05mm)
RUEF400K PTC RESET FUSE 30V 4A RADIAL Littelfuse Inc.	3,040	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RUEF	Bag	Active	Polymeric	30V	4 A	8 A	100 A	12.7 s	10 mOhms	50 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.551" L x 0.118" W (14.00mm x 3.00mm)	0.839" (21.30mm)	-	0.199" (5.05mm)
LVR012K PTC RESET FUSE 240V 120MA RADIAL Littelfuse Inc.	8,872	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, LVR	Bag	Active	Polymeric	240V (265V Int)	120 mA	300 mA	1.2 A	15 s	3 Ohms	12 Ohms	-	-20°C ~ 85°C	-	-	-	Through Hole	0.327" Dia x 0.150" T (8.30mm x 3.80mm)	0.508" (12.90mm)	-	0.200" (5.08mm)
30R160UU PTC RESET FUSE 30V 1.6A RADIAL Littelfuse Inc.	7,404	-	RFQ	Datasheet	Radial, Disc	POLY-FUSE®, 30R	Bulk	Active	Polymeric	30V	1.6 A	3.2 A	40 A	8 s	30 mOhms	110 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.350" L x 0.118" W (8.90mm x 3.00mm)	0.598" (15.20mm)	-	0.201" (5.10mm)
ASMDC050F-2 PTC RESET FUSE 60V 500MA 2SMD Littelfuse Inc.	4,540	-	RFQ	Datasheet	2-SMD	PolySwitch®, ASMD	Tape & Reel (TR)	Active	Polymeric	60V	500 mA	1 A	10 A	4 s	150 mOhms	1.2 Ohms	-	-	Automotive	AEC-Q200	-	Surface Mount	0.295" L x 0.201" W (7.50mm x 5.10mm)	-	0.035" (0.90mm)	-
LVR025S-2 PTC RESET FUSE 240V 250MA RADIAL Littelfuse Inc.	6,489	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, LVR	Tape & Reel (TR)	Active	Polymeric	240V (265V Int)	250 mA	560 mA	3.5 A	18.5 s	1.3 Ohms	3.8 Ohms	-	-20°C ~ 85°C	-	-	-	Through Hole	0.378" L x 0.150" W (9.60mm x 3.80mm)	0.685" (17.40mm)	-	0.200" (5.08mm)
0805L020/24YR POLYSWITCH RESETTABLE PPTC Littelfuse Inc.	4,803	-	RFQ	Datasheet	0805 (2012 Metric), Concave	POLY-FUSE®, 0805L	Tape & Reel (TR)	Active	Polymeric	24V	200 mA	500 mA	100 A	500 ms	500 mOhms	3.5 Ohms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.083" L x 0.053" W (2.10mm x 1.35mm)	-	0.030" (0.75mm)	-
RGEF1000-2 PTC RESET FUSE 16V 10A RADIAL Littelfuse Inc.	9,095	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RGEF	Tape & Reel (TR)	Active	Polymeric	16V	10 A	17 A	100 A	6 s	4 mOhms	10.2 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.650" L x 0.098" W (16.50mm x 2.50mm)	0.992" (25.20mm)	-	0.199" (5.05mm)
LVR055K-2 PTC RESET FUSE 240V 550MA RADIAL Littelfuse Inc.	4,541	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, LVR	Tape & Reel (TR)	Active	Polymeric	240V (265V Int)	550 mA	1.25 A	7 A	26 s	450 mOhms	1.45 Ohms	-	-20°C ~ 85°C	-	-	-	Through Hole	0.551" L x 0.161" W (14.00mm x 4.10mm)	0.882" (22.40mm)	-	0.200" (5.08mm)

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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.