PTC Resettable Fuses

Review PTC Resettable Fuses Circuit Protection components in this filtered selection. Compare manufacturer information, availability, pricing, datasheets and key specifications to narrow down suitable parts for your application.

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Mfr. Part #	Availability	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
TRF250-055T PTC RESET FUSE 60V 55MA RADIAL Littelfuse Inc.	9,520	RFQ	Datasheet	Radial, Disc	PolySwitch®, TRF250	Bulk	Active	Polymeric	60V (250V Int)	55 mA	170 mA	3 A	3.5 s	15 Ohms	35 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)
MXP180 PTC RESET FUSE 6V 1.8A STRAP Littelfuse Inc.	2,496	RFQ	Datasheet	Strap	PolySwitch®, MXP	Bulk	Obsolete	Polymeric	6V	1.8 A	5.2 A	50 A	5 s	7 mOhms	24 mOhms	-	-	-	-	-	User Defined	-	0.043" (1.10mm)	-	-
MXP270 PTC RESET FUSE 6V 2.7A STRAP Littelfuse Inc.	5,923	RFQ	Datasheet	Strap	PolySwitch®, MXP	Bulk	Obsolete	Polymeric	6V	2.7 A	6.2 A	50 A	2 s	6 mOhms	26 mOhms	-	-	-	-	-	User Defined	-	0.043" (1.10mm)	-	-
MGP500 PTC RESET FUSE 6V 5A STRAP Littelfuse Inc.	4,129	RFQ	Datasheet	Strap	PolySwitch®, MGP	Bulk	Obsolete	Polymeric	6V	5 A	9.2 A	50 A	5 s	2.5 mOhms	13 mOhms	-	-	-	-	-	User Defined	0.591" L x 0.122" W (15.00mm x 3.11mm)	0.037" (0.95mm)	-	-
FEMTOSMDC035F-2 PTC RESET FUSE 6V 350MA 0603 Littelfuse Inc.	8,874	RFQ	Datasheet	0603 (1608 Metric), Concave	PolySwitch®, femtoSMDC	Tape & Reel (TR)	Discontinued at Digi-Key	Polymeric	6V	350 mA	700 mA	40 A	100 ms	280 mOhms	1 Ohms	-	-	-	-	-	Surface Mount	0.063" L x 0.032" W (1.60mm x 0.80mm)	-	0.037" (0.95mm)	-
16R400GKLU PTC 16V POLYFUSE BULK RADIAL LEA Littelfuse Inc.	9,719	RFQ	Datasheet	Radial, Disc	POLY-FUSE®, 16R	Bulk	Obsolete	Polymeric	16V	4 A	6.8 A	100 A	1.7 s	21 mOhms	60 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.350" L x 0.118" W (8.90mm x 3.00mm)	0.504" (12.80mm)	-	0.201" (5.10mm)
PSR-28690-2 PSR RESET FUSE Littelfuse Inc.	2,979	RFQ	Datasheet	-	*	Tape & Reel (TR)	Obsolete	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
NANOSMD175LR-E PTC RESET FUSE 6V 1.75A 1206 Littelfuse Inc.	7,574	RFQ	Datasheet	-	*	Tape & Reel (TR)	Obsolete	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
PSR-28445-E-2 PSR RESET FUSE Littelfuse Inc.	2,934	RFQ	Datasheet	-	*	Tape & Reel (TR)	Obsolete	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
MICROSMD450LR-XC-2 PTC RESET FUSE 12V 4.5A 1206 Littelfuse Inc.	5,947	RFQ	Datasheet	-	*	Tape & Reel (TR)	Obsolete	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

FAQ

Frequently Asked Questions

What are PTC Resettable Fuses components used for?

PTC Resettable Fuses components are used in a wide range of electronic equipment and systems. Their exact function depends on the device, circuit design and technical requirements of the application.

How do I choose the right PTC Resettable Fuses part?

Compare the manufacturer part number, key specifications, package type, operating conditions, availability and datasheet information. For replacement projects, always verify the critical electrical and mechanical parameters before selecting an alternative.

Can JIEXIN Electronics help source obsolete or hard-to-find PTC Resettable Fuses parts?

Yes. Send us the required manufacturer part number, quantity or BOM. Our sourcing team can help check stock availability, lead time, alternative sourcing options and quotation details.

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