Specification	RUEF250U

Approval Agency	CSA, TUV, UL, CQC
Current - Hold (Ih) (Max)	2.5 A
Current - Max [Max]	100 A
Current - Trip (It)	5 A
Height - Seated (Max) [Max] [z]	18.3 mm
Height - Seated (Max) [Max] [z]	0.72 in
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]	20 mOhms
Resistance - Post Trip (R1) (Max) [Max] [custom]	70 mOhms
Size / Dimension [x]	11.4 mm
Size / Dimension [x]	0.449 "
Size / Dimension [y]	3 mm
Size / Dimension [y]	0.118 in
Time to Trip	10.3 s
Type	Polymeric
Voltage - Max [Max]	30 V

RUEF Series

Part	Approval Agency	Package / Case	Current - Trip (It)	Time to Trip	Current - Hold (Ih) (Max)	Operating Temperature [Max]	Operating Temperature [Min]	Resistance - Post Trip (R1) (Max) [Max]	Height - Seated (Max) [Max]	Height - Seated (Max) [Max]	Resistance - Initial (Ri) (Min) [Min]	Voltage - Max [Max]	Mounting Type	Type	Size / Dimension [x]	Size / Dimension [y]	Size / Dimension [y]	Size / Dimension [x]	Lead Spacing	Lead Spacing	Current - Max [Max]	Resistance - Post Trip (R1) (Max) [Max] [custom]	Height - Seated (Max) [Max] [z]	Height - Seated (Max) [Max] [z]	Current - Hold (Ih) (Max) [Max]	Height - Seated (Max)	Height - Seated (Max) [Max]	Size / Dimension [z]	Size / Dimension [diameter]	Size / Dimension [diameter]	Size / Dimension [z]
LITTELFUSE RUEF160S	CQC CSA TUV UL	Disc Radial	3.2 A	8 s	1.6 A	85 °C	-40 C	110 mOhms	0.598 in	15.2 mm	30 mOhms	30 V	Through Hole	Polymeric	8.9 mm	3 mm	0.118 in	0.35 in	5.05 mm	0.199 "	100 A
LITTELFUSE RUEF250	CQC CSA TUV UL	Disc Radial	5 A	10.3 s	2.5 A						20 mOhms	30 V	Through Hole	Polymeric	11.4 mm	3 mm	0.118 in	0.449 "	5.05 mm	0.199 "	100 A	70 mOhms	18.3 mm	0.72 in
LITTELFUSE RUEF090-2		Disc Radial	1.8 A	5.9 s		85 °C	-40 C	220 mOhms	0.48 in		70 mOhms	30 V	Through Hole	Polymeric	7.4 mm	3 mm	0.118 in	0.291 in	5.08 mm	0.2 in	100 A				900 mA	12.2 mm
LITTELFUSE RUEF250U	CQC CSA TUV UL	Disc Radial	5 A	10.3 s	2.5 A	85 °C	-40 C				20 mOhms	30 V	Through Hole	Polymeric	11.4 mm	3 mm	0.118 in	0.449 "	5.05 mm	0.199 "	100 A	70 mOhms	18.3 mm	0.72 in
LITTELFUSE RUEF090-AP		Disc Radial	1.8 A	5.9 s		85 °C	-40 C	220 mOhms	0.48 in		70 mOhms	30 V	Through Hole	Polymeric	7.4 mm	3 mm	0.118 in	0.291 in	5.05 mm	0.199 "	100 A				900 mA	12.2 mm
LITTELFUSE RUEF700K		Disc Radial	14 A	17.5 s		85 °C	-40 C	30 mOhms	1.091 in		5 mOhms	30 V	Through Hole	Polymeric	19.1 mm	3 mm	0.118 in	0.752 in	10.15 mm	0.4 "	100 A				7 A	27.7 mm
LITTELFUSE RUEF300K-2	CQC CSA TUV UL	Disc Radial	6 A	10.8 s		85 °C	-40 C	80 mOhms		0.71 "	20 mOhms	30 V	Through Hole	Polymeric	11.4 mm	3 mm	0.118 in	0.449 "	5.05 mm	0.199 "	100 A				3 A		18.03 mm
LITTELFUSE RUEF400K-2		Disc Radial	8 A			85 °C	-40 C	50 mOhms			10 mOhms	30 V	Through Hole	Polymeric	14 mm	3 mm	0.118 in	0.551 in	5.05 mm	0.199 "	100 A		21.3 mm	0.839 in	4 A
LITTELFUSE RUEF110-2		Disc Radial	2.2 A	6.6 s		85 °C	-40 C	170 mOhms	0.559 "	14.2 mm	70 mOhms	30 V	Through Hole	Polymeric					5.05 mm	0.199 "	100 A				1.1 A			3 mm	7.4 mm	0.291 "	0.118 in
LITTELFUSE RUEF600K		Disc Radial	12 A	16 s		85 °C	-40 C	0.04 Ohms	1.032 in	26.2 mm	5 mOhms	30 V	Through Hole	Polymeric	16.5 mm	3 mm	0.118 in	0.65 in	10.15 mm	0.4 "	100 A				6 A

Pricing

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

Distributor	Package	Quantity	$	Updated

Arrow	N/A	1	$ 0.22	1m+
		5	$ 0.22
		10	$ 0.20
		50	$ 0.19
		100	$ 0.19
		250	$ 0.19
Digikey	Bag	1	$ 0.53	1m+
		5	$ 0.44
		10	$ 0.41
		50	$ 0.34
		100	$ 0.31
		250	$ 0.28
		500	$ 0.26
		1000	$ 0.24
		5000	$ 0.20
	N/A	9432	$ 0.53	1m+
Mouser	N/A	1	$ 0.44	1m+
		10	$ 0.40
		25	$ 0.29
		100	$ 0.26
		250	$ 0.24
		500	$ 0.23
		1000	$ 0.21
		2500	$ 0.21
		5000	$ 0.20

Description

General part information

RUEF Series

Polymeric PTC Resettable Fuse 30V 2.5 A Ih Through Hole Radial, Disc

Documents

Technical documentation and resources

RUEF250U Datasheet

Datasheet

PolySwitch, Radial-leaded Catalog

Datasheet