MPN

Littelfuse 4 A Resettable Fuse, 30V dc

RS Stock No.:: 517-6837
Mfr. Part No.:: RUEF400
Manufacturer:: Littelfuse

This image is representative of the product range

Bulk discount available

View bulk pricing options

Subtotal (1 pack of 10 units)*

SGD7.53

(exc. GST)

SGD8.21

(inc. GST)

FREE delivery for orders over $75.00, or create a business account to enjoy free delivery from just $28

In Stock

Plus 1,580 unit(s) shipping from 05 October 2026
Plus 730 unit(s) shipping from 12 October 2026

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

Units	Per unit	Per Pack*
10 - 90	SGD0.753	SGD7.53
100 - 490	SGD0.736	SGD7.36
500 - 1490	SGD0.719	SGD7.19
1500 - 7490	SGD0.703	SGD7.03
7500 +	SGD0.58	SGD5.80

*price indicative

RS Stock No.:: 517-6837
Mfr. Part No.:: RUEF400
Manufacturer:: Littelfuse

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Littelfuse
	Trip Current	8A
	Product Type	Resettable Fuse
	Voltage	30V dc
	Time to Trip	12.7s
	Current Rating	100A
	Hold Current	4A
	Length	14mm
	Height	19.3mm
	Width	3mm
	Minimum Resistance	0.01Ω
	Minimum Operating Temperature	-40°C
	Maximum Resistance	50mΩ
	Power Dissipation	2.5W
	Maximum Operating Temperature	60°C
	Standards/Approvals	UL, CSA, RoHS, TUV, CQC
	Lead Orientation	Radial
	Series	RUEF

	Select all
	Brand Littelfuse
	Trip Current 8A
	Product Type Resettable Fuse
	Voltage 30V dc
	Time to Trip 12.7s
	Current Rating 100A
	Hold Current 4A
	Length 14mm
	Height 19.3mm
	Width 3mm
	Minimum Resistance 0.01Ω
	Minimum Operating Temperature -40°C
	Maximum Resistance 50mΩ
	Power Dissipation 2.5W
	Maximum Operating Temperature 60°C
	Standards/Approvals UL, CSA, RoHS, TUV, CQC
	Lead Orientation Radial
	Series RUEF

PolySwitch™ RUEF & RGEF 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

Be the first to know about our latest products and offers

Email address

The personal information you provide to us when signing up to this mailing list will be processed in line with the Privacy Policy