MPN

Littelfuse 1 A Resettable Fuse, 30V dc

RS stock no.:: 657-1772
Mfr. Part No.:: RHEF100
Manufacturer:: Littelfuse

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Bulk discount available

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Subtotal (1 pack of 5 units)*

R 65,66

(exc. VAT)

R 75,51

(inc. VAT)

FREE delivery for orders over R 1,500.00

In Stock

55 unit(s) ready to ship from another location
Plus 130 unit(s) shipping from 02 October 2026
Plus 500 unit(s) shipping from 21 October 2026

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

Units	Per unit	Per Pack*
5 - 70	R 13.132	R 65.66
75 - 245	R 12.804	R 64.02
250 - 495	R 12.42	R 62.10
500 - 1245	R 11.924	R 59.62
1250 +	R 11.448	R 57.24

*price indicative

RS stock no.:: 657-1772
Mfr. Part No.:: RHEF100
Manufacturer:: Littelfuse

Specification

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Littelfuse
	Product Type	Resettable Fuse
	Trip Current	1.8A
	Voltage	30V dc
	Current Rating	40A
	Time to Trip	5.2s
	Hold Current	1A
	Length	9.7mm
	Height	13.6mm
	Width	3mm
	Minimum Resistance	0.18Ω
	Minimum Operating Temperature	-40°C
	Maximum Resistance	430mΩ
	Power Dissipation	1.4W
	Maximum Operating Temperature	60°C
	Standards/Approvals	TUV, RoHS, CSA, UL
	Series	RHEF
	Lead Orientation	Radial

	Select all
	Brand Littelfuse
	Product Type Resettable Fuse
	Trip Current 1.8A
	Voltage 30V dc
	Current Rating 40A
	Time to Trip 5.2s
	Hold Current 1A
	Length 9.7mm
	Height 13.6mm
	Width 3mm
	Minimum Resistance 0.18Ω
	Minimum Operating Temperature -40°C
	Maximum Resistance 430mΩ
	Power Dissipation 1.4W
	Maximum Operating Temperature 60°C
	Standards/Approvals TUV, RoHS, CSA, UL
	Series RHEF
	Lead Orientation Radial

PolySwitch™ PTC Devices RHEF Series

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

Approvals

UL, CSA, TUV

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