Specification	RXEF250

Approval Agency	CSA, TUV, UL, CQC
Current - Hold (Ih) (Max)	2.5 A
Current - Max [Max]	40 A
Current - Trip (It)	5 A
Height - Seated (Max)	25.4 mm
Height - Seated (Max) [Max]	1 in
Lead Spacing	10.15 mm
Lead Spacing	0.4 "
Mounting Type	Through Hole
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 C
Package / Case	Disc, Radial
Resistance - Initial (Ri) (Min) [Min]	50 mOhms
Resistance - Post Trip (R1) (Max) [Max]	130 mOhms
Size / Dimension [custom]	0.118 "
Size / Dimension [custom]	3 mm
Size / Dimension [diameter]	20.8 mm
Size / Dimension [diameter]	0.819 "
Time to Trip	15.6 s
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	Bag	1	$ 0.89	1m+
		5	$ 0.74
		10	$ 0.68
		50	$ 0.57
		100	$ 0.52
		250	$ 0.47
		500	$ 0.43
		1000	$ 0.40
		5000	$ 0.34
	N/A	15816	$ 0.89	1m+
Mouser	N/A	1	$ 0.89	1m+
		5	$ 0.74
		10	$ 0.66
		50	$ 0.53
		100	$ 0.47
		250	$ 0.44
		500	$ 0.41
		1000	$ 0.39
		2500	$ 0.34
Newark	Each	1	$ 0.87	1m+
		10	$ 0.67
		25	$ 0.61
		50	$ 0.56
		100	$ 0.51
		500	$ 0.42
		1000	$ 0.39

Description

General part information

RXEF Series

The RXEF250 is a 2.5A radial leaded PolySwitch Resettable Device with tin-plated copper 20AWG leads for low hold currents (down to 50mA) and high voltage rating (up to 72V). This RXEF series is compatible with high-volume electronics assembly and assists in meeting regulatory requirements.

Documents

Technical documentation and resources

RXEF250 Datasheet (PDF)

Datasheet

Product Change Notice EN

Datasheet