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
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	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

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PTC Resettable Fuses FAQ

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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.

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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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