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
0603L003/36YR PTC RESET FUSE 36V 30MA 0603 Littelfuse Inc.	2,817	-	RFQ	Datasheet	0603 (1608 Metric), Concave	POLY-FUSE®, 0603L	Tape & Reel (TR)	Active	Polymeric	36V	30 mA	90 mA	40 A	1 s	6 Ohms	50 Ohms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.063" L x 0.031" W (1.60mm x 0.80mm)	-	0.039" (1.00mm)	-
2920L500/16MR PTC RESET FUSE 16V 5A 2920 Littelfuse Inc.	1,477	-	RFQ	Datasheet	2920 (7351 Metric), Concave	POLY-FUSE®, 2920L	Tape & Reel (TR)	Active	Polymeric	16V	5 A	10 A	40 A	5 s	5 mOhms	25 mOhms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.289" L x 0.202" W (7.35mm x 5.12mm)	-	0.063" (1.60mm)	-
1210L900SLPR PTC RESET FUSE 9.0A 6V 1210 Littelfuse Inc.	965	-	RFQ	Datasheet	1210 (3225 Metric), Concave	POLY-FUSE®, LoRho	Tape & Reel (TR)	Active	Polymeric	6V	9 A	18 A	50 A	2 s	1 Ohms	5.5 Ohms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.055" (1.40mm)	-
MICROSMD110F-2 PTC RESET FUSE 6V 1.1A 1210 Littelfuse Inc.	243	-	RFQ	Datasheet	1210 (3225 Metric), Concave	PolySwitch®, microSMD	Tape & Reel (TR)	Active	Polymeric	6V	1.1 A	2.2 A	40 A	200 ms	70 mOhms	210 mOhms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.127" L x 0.102" W (3.22mm x 2.58mm)	-	0.019" (0.48mm)	-
RUSBF090 PTC RESET FUSE 16V 900MA RADIAL Littelfuse Inc.	558	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RUSBF	Bag	Active	Polymeric	16V	900 mA	1.8 A	40 A	1.2 s	70 mOhms	180 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.291" Dia x 0.122" T (7.40mm x 3.10mm)	0.480" (12.20mm)	-	0.199" (5.05mm)
RKEF135 PTC RESET FUSE 60V 1.35A RADIAL Littelfuse Inc.	471	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RKEF	Bag	Active	Polymeric	60V	1.35 A	2.7 A	40 A	4.5 s	110 mOhms	370 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.402" L x 0.150" W (10.20mm x 3.80mm)	0.669" (17.00mm)	-	0.200" (5.08mm)
RUEF135-2 PTC RESET FUSE 30V 1.35A RADIAL Littelfuse Inc.	228	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RUEF	Tape & Reel (TR)	Active	Polymeric	30V	1.35 A	2.7 A	100 A	7.3 s	40 mOhms	130 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.350" L x 0.118" W (8.90mm x 3.00mm)	0.532" (13.50mm)	-	0.199" (5.05mm)
60R040XU PTC RESET FUSE 60V 400MA RADIAL Littelfuse Inc.	115	-	RFQ	Datasheet	Radial, Disc	POLY-FUSE®, 60R	Bulk	Active	Polymeric	60V	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)
RGEF300 PTC RESET FUSE 16V 3A RADIAL Littelfuse Inc.	252	-	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)
RHEF070 PTC RESET FUSE 30V 700MA RADIAL Littelfuse Inc.	780	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RHEF	Bag	Active	Polymeric	30V	700 mA	1.4 A	40 A	3.2 s	300 mOhms	800 mOhms	-	-40°C ~ 125°C	-	-	-	Through Hole	0.272" L x 0.118" W (6.90mm x 3.00mm)	0.425" (10.80mm)	-	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.

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.