Specification	RXEF185-2

Approval Agency	CSA, TUV, UL, CQC
Current - Hold (Ih) (Max)	1.85 A
Current - Max [Max]	40 A
Current - Trip (It)	3.7 A
Height - Seated (Max) [Max]	22.4 mm
Height - Seated (Max) [Max]	0.882 "
Lead Spacing	5.05 mm
Lead Spacing	0.199 "
Mounting Type	Through Hole
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 C
Package / Case	Disc, Radial
Resistance - Initial (Ri) (Min) [Min]	80 mOhms
Size / Dimension [custom]	3 mm
Size / Dimension [custom]	0.118 in
Size / Dimension [diameter]	0.689 in
Size / Dimension [diameter]	17.5 mm
Type	Polymeric
Voltage - Max [Max]	72 V

RXEF Series

Part	Resistance - Post Trip (R1) (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Size / Dimension	Size / Dimension [custom]	Size / Dimension [diameter]	Current - Trip (It)	Package / Case	Lead Spacing	Lead Spacing	Voltage - Max [Max]	Type	Current - Max [Max]	Time to Trip	Mounting Type	Resistance - Initial (Ri) (Min) [Min]	Height - Seated (Max) [Max]	Height - Seated (Max) [Max]	Current - Hold (Ih) (Max) [Max]	Approval Agency	Height - Seated (Max) [Max]	Current - Hold (Ih) (Max)	Size / Dimension [custom]	Size / Dimension [custom]	Size / Dimension [diameter]	Size / Dimension [custom]	Size / Dimension [diameter]	Height - Seated (Max)	Size / Dimension [z]	Size / Dimension [z]	Height - Seated (Max) [Max] [z]	Size / Dimension [y]	Size / Dimension [y]	Size / Dimension [x]	Size / Dimension [x]
LITTELFUSE RXEF300-2	100 mOhms	85 °C	-40 C	3 mm 23.9 mm	0.118 "	0.941 in	6 A	Disc Radial	10.15 mm	0.4 "	72 V	Polymeric	40 A	19.8 s	Through Hole	40 mOhms	28.6 mm	1.126 in	3 A
LITTELFUSE RXEF185-2		85 °C	-40 C			0.689 in	3.7 A	Disc Radial	5.05 mm	0.199 "	72 V	Polymeric	40 A		Through Hole	80 mOhms		22.4 mm		CQC CSA TUV UL	0.882 "	1.85 A	3 mm	0.118 in	17.5 mm
LITTELFUSE RXEF250	130 mOhms	85 °C	-40 C				5 A	Disc Radial	10.15 mm	0.4 "	72 V	Polymeric	40 A	15.6 s	Through Hole	50 mOhms				CQC CSA TUV UL	1 in	2.5 A	3 mm		20.8 mm	0.118 "	0.819 "	25.4 mm
LITTELFUSE RXEF020S	4.4 Ohms	85 °C	-40 C			0.291 "	400 mA	Disc Radial	5.05 mm	0.199 "	72 V	Polymeric	40 A	2.2 s	Through Hole	1.83 Ohms		11.7 mm	200 mA						7.4 mm				3 mm	0.118 in	0.461 in
LITTELFUSE RXEF030	2.1 Ohms	85 °C	-40 C			0.291 "	600 mA	Disc Radial	5.08 mm	0.2 in	72 V	Polymeric	40 A	3 s	Through Hole	880 mOhms		12.7 mm	300 mA		0.5 in				7.4 mm				3 mm	0.118 in
LITTELFUSE RXEF017-2	8 Ohms	85 °C	-40 C				340 mA	Disc Radial	5.08 mm	0.2 in	60 V	Polymeric	40 A	3 s	Through Hole	3.3 Ohms		12.7 mm	170 mA		0.5 in											0.118 in	3 mm	7.4 mm	0.291 in

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	Cut Tape (CT)	1	$ 0.59	1m+
		5	$ 0.57
		10	$ 0.56
		50	$ 0.47
		100	$ 0.39
		250	$ 0.35
		500	$ 0.30
	N/A	5842	$ 0.83	1m+
	Tape & Reel (TR)	1500	$ 0.26	1m+
		3000	$ 0.24
		7500	$ 0.24
Mouser	N/A	1	$ 0.62	1m+
		10	$ 0.57
		50	$ 0.47
		100	$ 0.43
		250	$ 0.39
		500	$ 0.36
		1500	$ 0.32
		3000	$ 0.29
		4500	$ 0.28

Description

General part information

RXEF Series

Polymeric PTC Resettable Fuse 72V 1.85 A Ih Through Hole Radial, Disc

Documents

Technical documentation and resources

RXEF185-2

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RXEF185-2

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Technical Specifications

RXEF Series

Pricing

Description

RXEF Series

Documents

Product Change Notice EN

RXEF185-2 Datasheet (PDF)

PolySwitch, Radial-leaded Catalog

RXEF Series