Subtotal (1 pack of 5 units)*
£2.89
(exc. VAT)
£3.47
(inc. VAT)
FREE delivery for orders over £60.00
In Stock
- 110 unit(s) ready to ship
- Plus 130 unit(s) shipping from 02 September 2026
- Plus 500 unit(s) shipping from 18 November 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit | Per Pack* |
|---|---|---|
| 5 + | £0.578 | £2.89 |
*price indicative
- RS Stock No.:
- 657-1772
- Mfr. Part No.:
- RHEF100
- 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 | |
| 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 | |
| Maximum Resistance | 430mΩ | |
| Minimum Operating Temperature | -40°C | |
| Maximum Operating Temperature | 60°C | |
| Power Dissipation | 1.4W | |
| 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 | ||
Maximum Resistance 430mΩ | ||
Minimum Operating Temperature -40°C | ||
Maximum Operating Temperature 60°C | ||
Power Dissipation 1.4W | ||
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
Related links
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- Littelfuse 0.16 A Resettable Fuse, 30V dc
- Littelfuse 1.35 A Resettable Fuse, 30V dc
- Littelfuse 0.05 A Resettable Fuse, 30V dc
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