Bulk discount available
Subtotal (1 pack of 10 units)*
£5.67
(exc. VAT)
£6.80
(inc. VAT)
FREE delivery for orders over £60.00
In Stock
- Plus 50 unit(s) shipping from 27 April 2026
- Plus 170 unit(s) shipping from 04 May 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit | Per Pack* |
|---|---|---|
| 10 - 90 | £0.567 | £5.67 |
| 100 - 490 | £0.491 | £4.91 |
| 500 - 1490 | £0.478 | £4.78 |
| 1500 - 2490 | £0.468 | £4.68 |
| 2500 + | £0.456 | £4.56 |
*price indicative
- RS Stock No.:
- 647-8639
- Mfr. Part No.:
- MF-R800
- Brand:
- Bourns
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Bourns | |
| Product Type | Resettable Fuse | |
| Trip Current | 16A | |
| Voltage | 30 V | |
| Time to Trip | 18.8s | |
| Current Rating | 40 A | |
| Hold Current | 8A | |
| Length | 24.2mm | |
| Height | 32.9mm | |
| Width | 3 mm | |
| Minimum Resistance | 0.005Ω | |
| Maximum Resistance | 30mΩ | |
| Minimum Operating Temperature | -40°C | |
| Power Dissipation | 4W | |
| Maximum Operating Temperature | 85°C | |
| Standards/Approvals | RoHS, UL | |
| Lead Orientation | Radial | |
| Lead Diameter | 0.81mm | |
| Series | MFR | |
| Select all | ||
|---|---|---|
Brand Bourns | ||
Product Type Resettable Fuse | ||
Trip Current 16A | ||
Voltage 30 V | ||
Time to Trip 18.8s | ||
Current Rating 40 A | ||
Hold Current 8A | ||
Length 24.2mm | ||
Height 32.9mm | ||
Width 3 mm | ||
Minimum Resistance 0.005Ω | ||
Maximum Resistance 30mΩ | ||
Minimum Operating Temperature -40°C | ||
Power Dissipation 4W | ||
Maximum Operating Temperature 85°C | ||
Standards/Approvals RoHS, UL | ||
Lead Orientation Radial | ||
Lead Diameter 0.81mm | ||
Series MFR | ||
MF-R Series
Radial leaded devices
Rated at 40A except MF-R1100 which is rated at 100A
Cured, flame retardant epoxy polymer insulating material meets UL 94V-0 requirements
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