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
SMD2920P300TSA PTC RESET FUSE 6V 3A 2920 Littelfuse Inc.	9,345	-	RFQ	Datasheet	2920 (7351 Metric), Concave	POLY-FUSE®, SMD2920	Tape & Reel (TR)	Obsolete	Polymeric	6V	3 A	6 A	40 A	20 s	15 mOhms	48 mOhms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.290" L x 0.202" W (7.36mm x 5.12mm)	-	0.039" (1.00mm)	-
SMD2920P300TSA/15 PTC RESET FUSE 15V 3A 2920 Littelfuse Inc.	3,502	-	RFQ	Datasheet	2920 (7351 Metric), Concave	POLY-FUSE®, SMD2920	Tape & Reel (TR)	Obsolete	Polymeric	15V	3 A	6 A	40 A	20 s	15 mOhms	48 mOhms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.290" L x 0.202" W (7.36mm x 5.12mm)	-	0.039" (1.00mm)	-
RTEF120 PTC RESET FUSE 33V 1.2A RADIAL Littelfuse Inc.	3,476	-	RFQ	Datasheet	Radial, Disc	PolySwitch®	Bag	Obsolete	Polymeric	33V	1.2 A	2.3 A	40 A	3.5 s	74 mOhms	180 mOhms	-	-	-	-	-	Through Hole	0.291" L x 0.118" W (7.40mm x 3.00mm)	0.480" (12.20mm)	-	0.199" (5.05mm)
RXEF040-1 PTC RESET FUSE 72V 400MA RADIAL Littelfuse Inc.	4,166	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RXEF	Bulk	Obsolete	Polymeric	72V	400 mA	800 mA	40 A	3.8 s	550 mOhms	1.29 Ohms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.299" Dia x 0.118" T (7.60mm x 3.00mm)	0.532" (13.50mm)	-	0.199" (5.05mm)
RXEF050S-0.236 PTC RESET FUSE 72V 500MA RADIAL Littelfuse Inc.	6,433	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RXEF	Bulk	Obsolete	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)
RXE090-2 PTC RESET FUSE 72V 900MA RADIAL Littelfuse Inc.	3,055	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RXE	Tape & Reel (TR)	Obsolete	Polymeric	72V	900 mA	1.8 A	40 A	7.2 s	200 mOhms	470 mOhms	-	-	-	-	-	Through Hole	0.441" Dia x 0.118" T (11.20mm x 3.00mm)	0.622" (15.80mm)	-	0.199" (5.05mm)
RUSBF090-AP PTC RESET FUSE 16V 900MA RADIAL Littelfuse Inc.	8,262	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RUSBF	Tape & Box (TB)	Obsolete	Polymeric	16V	900 mA	1.8 A	40 A	1.2 s	70 mOhms	180 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.291" L x 0.122" W (7.40mm x 3.10mm)	0.480" (12.20mm)	-	0.199" (5.05mm)
RUEF135-1 PTC RESET FUSE 30V 1.35A RADIAL Littelfuse Inc.	6,147	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RUEF	Bulk	Obsolete	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)
RUEF300-1 PTC RESET FUSE 30V 3A RADIAL Littelfuse Inc.	3,948	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RUEF	Bulk	Obsolete	Polymeric	30V	3 A	6 A	100 A	10.8 s	20 mOhms	80 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.449" L x 0.118" W (11.40mm x 3.00mm)	0.650" (16.50mm)	-	0.199" (5.05mm)
RTEF135 PTC RESET FUSE 33V 1.35A RADIAL Littelfuse Inc.	6,661	-	RFQ	Datasheet	Radial, Disc	PolySwitch®	Bag	Obsolete	Polymeric	33V	1.35 A	2.5 A	40 A	4.5 s	59 mOhms	143 mOhms	-	-	-	-	-	Through Hole	0.291" L x 0.118" W (7.40mm x 3.00mm)	0.559" (14.20mm)	-	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.

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.