Littelfuse 0.5 A Resettable Fuse, 72 V

RS Stock No.:: 517-6635
Distrelec Article No.:: 304-42-541
Mfr. Part No.:: RXEF050
Brand:: Littelfuse

Bulk discount available

Subtotal (1 pack of 10 units)*

£3.54

(exc. VAT)

£4.25

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

2,220 unit(s) ready to ship
Plus 310 unit(s) ready to ship from another location
Plus 14,100 unit(s) shipping from 16 February 2026

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit	Per Pack*
10 - 40	£0.354	£3.54
50 - 240	£0.298	£2.98
250 - 490	£0.255	£2.55
500 - 990	£0.223	£2.23
1000 +	£0.196	£1.96

*price indicative

RS Stock No.:: 517-6635
Distrelec Article No.:: 304-42-541
Mfr. Part No.:: RXEF050
Brand:: Littelfuse

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Littelfuse
	Trip Current	1A
	Product Type	Resettable Fuse
	Voltage	72 V
	Current Rating	40 A
	Time to Trip	4s
	Hold Current	0.5A
	Length	7.9mm
	Height	13.7mm
	Width	3 mm
	Minimum Resistance	0.5Ω
	Maximum Resistance	1.17Ω
	Minimum Operating Temperature	-40°C
	Power Dissipation	0.77W
	Maximum Operating Temperature	60°C
	Standards/Approvals	TUV, RoHS, CQC, UL, CSA
	Series	RXEF
	Lead Orientation	Radial

	Select all
	Brand Littelfuse
	Trip Current 1A
	Product Type Resettable Fuse
	Voltage 72 V
	Current Rating 40 A
	Time to Trip 4s
	Hold Current 0.5A
	Length 7.9mm
	Height 13.7mm
	Width 3 mm
	Minimum Resistance 0.5Ω
	Maximum Resistance 1.17Ω
	Minimum Operating Temperature -40°C
	Power Dissipation 0.77W
	Maximum Operating Temperature 60°C
	Standards/Approvals TUV, RoHS, CQC, UL, CSA
	Series RXEF
	Lead Orientation Radial

RXEF Series Datasheet

COO (Country of Origin):: CN

PolySwitch™ RXE Series

TE PolySwitch™ RXE represents series of low hold current (down to 50mA) and high voltage rating (up to 72V) devices. Typically used in printers, satellite video receivers, industrial controls, transformers, computer motherboards, modems, USB hubs, ports and peripherals, game machines, phones, fax machines, analog and digital line cards applications.

Current ratings from 50mA to 15A

Voltage ratings from 6V (computer and electronic applications) to 99V

Fast time-to-trip

Low resistance

RoHS compliant

Halogen free

PCB Wire Ended

All are UL, CSA, TUV approved

Protection of electrical and electronic circuits against excessive currents

Rapid switch from low resistance state to very high resistance with electrical overload or short circuit

Quick and automatic reset and return to low resistance state when fault condition corrected and power removed

Features:

Automatically resets itself thousands of times

Maintenance free

Small size and no fuseholder required

Main applications:

Security systems

Power supplies and transformers

Power switching devices

Automotive and medical equipment

Instrumentation and control

Computers and peripherals

Audio visual and telecommunications