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
RKEF500-1 PTC RESET FUSE 60V 5A RADIAL Littelfuse Inc.	8,340	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RKEF	Bag	Active	Polymeric	60V	5 A	10 A	40 A	28 s	12 mOhms	50 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.949" L x 0.118" W (24.10mm x 3.00mm)	1.142" (29.00mm)	-	0.400" (10.15mm)
LR4-730F PTC RESET FUSE 20V 7.3A STRAP Littelfuse Inc.	2,609	-	RFQ	Datasheet	Strap	PolySwitch®, LR4	Bag	Active	Polymeric	20V	7.3 A	14.1 A	100 A	5 s	6 mOhms	15 mOhms	-	-40°C ~ 85°C	-	-	-	User Defined	1.106" L x 0.559" W (28.10mm x 14.20mm)	-	0.039" (1.00mm)	-
TS600-170F-2 PTC RESET FUSE 60V 170MA 2SMD Littelfuse Inc.	8,798	-	RFQ	Datasheet	2-SMD	PolySwitch®, TS600	Tape & Reel (TR)	Active	Polymeric	60V (600V Int)	170 mA	400 mA	3 A	10 s	4 Ohms	18 Ohms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.742" L x 0.305" W (18.85mm x 7.75mm)	-	0.485" (12.32mm)	-
RGEF300-1 PTC RESET FUSE 16V 3A RADIAL Littelfuse Inc.	1,054	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RGEF	Bag	Active	Polymeric	16V	3 A	5.1 A	100 A	1 s	38 mOhms	97.5 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.260" L x 0.098" W (6.60mm x 2.50mm)	0.433" (11.00mm)	-	0.199" (5.05mm)
60R017XU PTC RESET FUSE 60V 170MA RADIAL Littelfuse Inc.	3,244	-	RFQ	Datasheet	Radial, Disc	POLY-FUSE®, 60R	Bulk	Active	Polymeric	60V	170 mA	340 mA	40 A	3 s	3.3 Ohms	8 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)
RXEF030S PTC RESET FUSE 72V 300MA RADIAL Littelfuse Inc.	2,518	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RXEF	Bag	Active	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 0.118" T (7.40mm x 3.00mm)	0.500" (12.70mm)	-	0.199" (5.05mm)
RXEF075S PTC RESET FUSE 72V 750MA RADIAL Littelfuse Inc.	3,521	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RXEF	Bulk	Active	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)	-	0.200" (5.08mm)
1210L075YR PTC RESET FUSE 6V 750MA 1210 Littelfuse Inc.	6,158	-	RFQ	Datasheet	1210 (3225 Metric), Concave	POLY-FUSE®, 1210L	Tape & Reel (TR)	Active	Polymeric	6V	750 mA	1.5 A	100 A	100 ms	130 mOhms	400 mOhms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.127" L x 0.102" W (3.22mm x 2.58mm)	-	0.033" (0.85mm)	-
RUSBF110 PTC RESET FUSE 16V 1.1A RADIAL Littelfuse Inc.	4,997	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RUSBF	Bag	Active	Polymeric	16V	1.1 A	2.2 A	40 A	2.3 s	50 mOhms	140 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.291" Dia x 0.118" T (7.40mm x 3.00mm)	0.559" (14.20mm)	-	0.199" (5.05mm)
RKEF300-2 PTC RESET FUSE 60V 3A RADIAL Littelfuse Inc.	2,822	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RKEF	Tape & Reel (TR)	Active	Polymeric	60V	3 A	6 A	40 A	19.8 s	30 mOhms	80 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.650" L x 0.118" W (16.50mm x 3.00mm)	0.835" (21.20mm)	-	0.199" (5.05mm)

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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.

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

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