PTC Resettable Fuses

Category Introduction

PTC Resettable Fuses are designed to stop current flow when it exceeds a certain limit (overcurrent protection). The Fuses work by increasing its resistance as its temperature rises due to the current increase. The trip current ranges from 14 mA to 50 A with the Time to trip ranging from 8 ms to 90 s. PTC = Positive Temperature Coefficient.

Product List

5803 Items

PDF	Mfr Part #	Quantity Available	UnitPrice	RFQ	Series	Packaging	Product Status	Type	Voltage - Max	Current - Max	Current - Hold (Ih) (Max)	Current - Trip (It)	Time to Trip	Resistance - Initial (Ri) (Min)	Resistance - Post Trip (R1) (Max)	Resistance - 25°C (Typ)	Operating Temperature	Ratings	Mounting Type	Package / Case	Size / Dimension	Height - Seated (Max)	Thickness (Max)	Lead Spacing
	60R050XU PTC RESET FUSE 60V 500MA RADIAL Littelfuse Inc.	661	$0.49		POLY-FUSE®, 60R	Bulk	Active	Polymeric	60V	40 A	500 mA	1 A	4 s	500 mOhms	1.17 Ohms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.311" Dia x 0.122" T (7.90mm x 3.10mm)	0.539" (13.70mm)	-	0.201" (5.10mm)
	30R110UU PTC RESET FUSE 30V 1.1A RADIAL Littelfuse Inc.	669	$0.50		POLY-FUSE®, 30R	Bulk	Active	Polymeric	30V	40 A	1.1 A	2.2 A	6.6 s	50 mOhms	170 mOhms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.291" L x 0.118" W (7.40mm x 3.00mm)	0.559" (14.20mm)	-	0.201" (5.10mm)
	MF-R300 PTC RESET FUSE 30V 3A RADIAL Bourns Inc.	732	$0.50		Multifuse®, MF-R	Bulk	Active	Polymeric	30V	40 A	3 A	6 A	10.8 s	20 mOhms	80 mOhms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.472" L x 0.118" W (12.00mm x 3.00mm)	0.720" (18.30mm)	-	0.201" (5.10mm)
	RKEF075 PTC RESET FUSE 60V 750MA RADIAL Littelfuse Inc.	146	$0.51		PolySwitch®, RKEF	Bag	Active	Polymeric	60V	40 A	750 mA	1.5 A	1.5 s	200 mOhms	640 mOhms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.310" L x 0.140" W (7.87mm x 3.56mm)	0.480" (12.20mm)	-	0.199" (5.05mm)
	MF-RM055/240-2 PTC RESET FUSE 240V 550MA RADIAL Bourns Inc.	44	$1.12		Multifuse®, MF-RM	Tape & Reel (TR)	Active	Polymeric	240V (265V Int)	7 A	550 mA	1.25 A	26 s	450 mOhms	1.45 Ohms	-	-20°C ~ 85°C	-	Through Hole	Radial, Disc	0.551" L x 0.161" W (14.00mm x 4.10mm)	0.882" (22.40mm)	-	0.114" (2.90mm)
	MF-R030 PTC RESET FUSE 60V 300MA RADIAL Bourns Inc.	505	$0.52		Multifuse®, MF-R	Bulk	Active	Polymeric	60V	40 A	300 mA	600 mA	3 s	760 mOhms	2.1 Ohms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.291" Dia x 0.122" T (7.40mm x 3.10mm)	0.528" (13.40mm)	-	0.201" (5.10mm)
	MF-FSML100/8-2 PTC RESET FUSE 8V 1A 0603 Bourns Inc.	420	$1.27		Multifuse®, MF-FSML	Tape & Reel (TR)	Active	Polymeric	8V	50 A	1 A	2 A	2 s	40 mOhms	220 mOhms	-	-40°C ~ 85°C	-	Surface Mount	0603 (1608 Metric), Concave	0.065" L x 0.033" W (1.65mm x 0.85mm)	-	0.028" (0.70mm)	-
	0ZRR0300FF1A PTC RESET FUSE 60V 3A RADIAL Bel Fuse Inc.	1,706	$0.53		0ZRR	Bulk	Active	Polymeric	60V	40 A	3 A	6 A	19.8 s	40 mOhms	100 mOhms	-	-40°C ~ 85°C	AEC-Q200	Through Hole	Radial, Disc	0.980" Dia x 0.122" T (24.90mm x 3.10mm)	1.181" (30.00mm)	-	0.402" (10.20mm)
	0ZRP0110FF1E PTC RESET FUSE 60V 1.1A RADIAL Bel Fuse Inc.	565	$0.53		0ZRP	Bulk	Active	Polymeric	60V	40 A	1.1 A	2.2 A	3 s	170 mOhms	470 mOhms	-	-40°C ~ 85°C	AEC-Q200	Through Hole	Radial, Disc	0.299" L x 0.142" W (7.60mm x 3.60mm)	0.591" (15.00mm)	-	0.201" (5.10mm)
	600R150-RBZR PTC RESET FUSE 60V 150MA RADIAL Littelfuse Inc.	541	$1.17		POLY-FUSE®, 600R	Cut Tape (CT)	Active	Polymeric	60V (600V Int)	3 A	150 mA	300 mA	3 s	9 Ohms	22 Ohms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.354" L x 0.181" W (9.00mm x 4.60mm)	0.492" (12.50mm)	-	0.201" (5.10mm)
	0ZRM0050FF1E PTC RESET FUSE 120V 500MA RADIAL Bel Fuse Inc.	1,033	$0.55		0ZRM	Box	Active	Polymeric	120V	3 A	500 mA	1 A	6 s	500 mOhms	1.17 Ohms	-	-40°C ~ 85°C	AEC-Q200	Through Hole	Radial, Disc	0.362" Dia x 0.150" T (9.20mm x 3.80mm)	0.587" (14.90mm)	-	0.201" (5.10mm)
	30R250UU PTC RESET FUSE 30V 2.5A RADIAL Littelfuse Inc.	1,734	$0.54		POLY-FUSE®, 30R	Bulk	Active	Polymeric	30V	40 A	2.5 A	5 A	10.3 s	20 mOhms	70 mOhms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.449" L x 0.118" W (11.40mm x 3.00mm)	0.720" (18.30mm)	-	0.118" (3.00mm)
	30R185UU PTC RESET FUSE 30V 1.85A RADIAL Littelfuse Inc.	1,810	$0.55		POLY-FUSE®, 30R	Bulk	Active	Polymeric	30V	40 A	1.85 A	3.7 A	8.7 s	30 mOhms	90 mOhms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.402" L x 0.118" W (10.20mm x 3.00mm)	0.618" (15.70mm)	-	0.201" (5.10mm)
	MF-R500 PTC RESET FUSE 30V 5A RADIAL Bourns Inc.	586	$0.55		Multifuse®, MF-R	Bulk	Active	Polymeric	30V	40 A	5 A	10 A	14.5 s	10 mOhms	50 mOhms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.685" L x 0.118" W (17.40mm x 3.00mm)	0.980" (24.90mm)	-	0.402" (10.20mm)
	30R160UU PTC RESET FUSE 30V 1.6A RADIAL Littelfuse Inc.	460	$0.57		POLY-FUSE®, 30R	Bulk	Active	Polymeric	30V	40 A	1.6 A	3.2 A	8 s	30 mOhms	110 mOhms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.350" L x 0.118" W (8.90mm x 3.00mm)	0.598" (15.20mm)	-	0.201" (5.10mm)
	MF-RX014/250-0 PTC RESET FUSE 60V 145MA RADIAL Bourns Inc.	43	$0.57		Multifuse®, MF-RX/250	Bulk	Active	Polymeric	60V (250V Int)	3 A	145 mA	-	-	3 Ohms	14 Ohms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.256" L x 0.181" W (6.50mm x 4.60mm)	0.433" (11.00mm)	-	0.201" (5.10mm)
	RKEF400-2 RKEF400-2 Littelfuse Inc.	84	$1.27		PolySwitch®, RKEF	Tape & Reel (TR)	Active	Polymeric	60V	40 A	4 A	8 A	24 s	14 mOhms	60 mOhms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.827" L x 0.118" W (21.00mm x 3.00mm)	0.980" (24.90mm)	-	0.400" (10.15mm)
	0ZRE0033FF1A PTC RESET FUSE 240V 330MA RADIAL Bel Fuse Inc.	1,338	$0.60		0ZRE	Box	Active	Polymeric	240V	6 A	330 mA	740 mA	21 s	830 mOhms	2.6 Ohms	-	-40°C ~ 85°C	AEC-Q200	Through Hole	Radial, Disc	0.449" L x 0.150" W (11.40mm x 3.80mm)	0.650" (16.50mm)	-	0.201" (5.10mm)
	RGEF300 PTC RESET FUSE 16V 3A RADIAL Littelfuse Inc.	472	$0.59		PolySwitch®, RGEF	Bag	Active	Polymeric	16V	100 A	3 A	5.1 A	1 s	38 mOhms	97.5 mOhms	-	-40°C ~ 85°C	-	Through Hole	Radial, Disc	0.260" L x 0.098" W (6.60mm x 2.50mm)	0.433" (11.00mm)	-	0.199" (5.05mm)
	1812L020/60DR PTC RESET FUSE 60V 200MA 1812 Littelfuse Inc.	247	$0.59		POLY-FUSE®, 1812L	Tape & Reel (TR)	Active	Polymeric	60V	40 A	200 mA	400 mA	2 s	1.4 Ohms	4.4 Ohms	-	-40°C ~ 85°C	-	Surface Mount	1812 (4532 Metric), Concave	0.179" L x 0.128" W (4.55mm x 3.24mm)	-	0.049" (1.25mm)	-