Over 800,000 products available

Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

52895 Products showing for Fuses & Circuit Breakers

Sort by
1 of 999+
In Stock
RS PRO FT Fuse Kit
  • RS Stock No. 893-8543
Subtotal (1 unit)
£173.29(exc. VAT)
£173.29/unit
In Stock
Contactum Residual Current Circuit Breaker with Overload Protection, 6A Current Rating, 1-Pole, 30 mA Trip Sensitivity,
  • RS Stock No. 240-6382
  • Mfr. Part No. CCPBR0606AB
Subtotal (1 unit)
£23.70(exc. VAT)
£23.70/unit
In Stock
Europa EUC3P EUC3P Miniature Circuit Breaker, 3-Pole, 10A, Type C, 400V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6581
  • Mfr. Part No. EUC3P10C
Subtotal (1 unit)
£22.40(exc. VAT)
£22.40/unit
In Stock
RS PRO Brass Earth Clamp Max. Conductor Size 35 mm²
  • RS Stock No. 426-3132
Subtotal (1 pack of 5 units)
£36.33(exc. VAT)
£36.33/pack
Temporarily out of stock
Eaton xEffect xEffect Miniature Circuit Breaker, 4-Pole, 40A, Type D, 400V ac AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4813
  • Mfr. Part No. 168094 FAZ6-D40/4
Subtotal (1 unit)
£169.66(exc. VAT)
£169.66/unit
In Stock
Europa EUC3P EUC3P Miniature Circuit Breaker, 3-Pole, 6A, Type C, 400V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6588
  • Mfr. Part No. EUC3P6C
Subtotal (1 unit)
£22.40(exc. VAT)
£22.40/unit
In Stock
Europa EUC3P EUC3P Miniature Circuit Breaker, 3-Pole, 2A, Type C, 400V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6575
  • Mfr. Part No. EUC3P2C
Subtotal (1 unit)
£22.40(exc. VAT)
£22.40/unit
In Stock
Contactum Residual Current Circuit Breaker with Overload Protection, 16A Current Rating, 1-Pole, 30 mA Trip Sensitivity,
  • RS Stock No. 240-6384
  • Mfr. Part No. CCPBR0616AB
Subtotal (1 unit)
£24.66(exc. VAT)
£24.66/unit
In Stock
RS PRO Miniature Circuit Breaker, 1-Pole, 4A, Type C, 240V ac AC, 240 V dc DC, 6 kA Breaking Capacity
  • RS Stock No. 265-0192
Subtotal (1 unit)
£8.66(exc. VAT)
£8.66/unit
In Stock
ABB F200 Series Residual Current Circuit Breaker, 40A, 4-Pole, 100 mA, Type A, 1 kA 480V ac
  • RS Stock No. 177-5087
  • Mfr. Part No. 2CSF204201R2400 F204 A S-40/0,1
Subtotal (1 unit)
£272.58(exc. VAT)
£272.58/unit
In Stock
Eaton 63A British Standard Fuse A3 550V ac, 73.5 mm
  • RS Stock No. 413-383
  • Mfr. Part No. BAO63
Subtotal (1 unit)
£11.33(exc. VAT)
£11.33/unit
In Stock
Littelfuse Automotive Fuse Kit
  • RS Stock No. 219-9556
  • Mfr. Part No. 00940957XXN
Subtotal (1 unit)
£45.49(exc. VAT)
£45.49/unit
In Stock
Europa EUC3P EUC3P Miniature Circuit Breaker, 3-Pole, 25A, Type C, 400V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6597
  • Mfr. Part No. EUC3P25C
Subtotal (1 unit)
£22.40(exc. VAT)
£22.40/unit
In Stock
Europa EUC3P EUC3P Miniature Circuit Breaker, 3-Pole, 50A, Type C, 400V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6604
  • Mfr. Part No. EUC3P50C
Subtotal (1 unit)
£22.40(exc. VAT)
£22.40/unit
In Stock
Europa EUC2P EUC2P Miniature Circuit Breaker, 2-Pole, 6A, Type C, 400V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6544
  • Mfr. Part No. EUC2P6C
Subtotal (1 unit)
£15.36(exc. VAT)
£15.36/unit
In Stock
RS PRO 6.3A F Glass Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 610-9737
Subtotal (1 pack of 10 units)
£3.43(exc. VAT)
£3.43/pack
In Stock
RS PRO 250A British Standard Fuse B3 415V ac, 111 mm
  • RS Stock No. 521-2781
Subtotal (1 unit)
£45.66(exc. VAT)
£45.66/unit
In Stock
Eaton 16A British Standard Fuse A2 550V ac, 73 mm
  • RS Stock No. 413-349
  • Mfr. Part No. AAO16
Subtotal (1 pack of 5 units)
£29.14(exc. VAT)
£29.14/pack
In Stock
Europa EUC1P EUC Miniature Circuit Breaker, 1-Pole, 4A, Type C, 400V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6490
  • Mfr. Part No. EUC1P4C
Subtotal (1 unit)
£10.24(exc. VAT)
£10.24/unit
In Stock
WJ Furse Copper Earth Bar L. 400 mm x W. 90mm x H. 90 mm 6 Ways
  • RS Stock No. 124-2496
  • Mfr. Part No. 7TCA083670R0739 LK245-6
Subtotal (1 unit)
£176.74(exc. VAT)
£176.74/unit
1
2
3
2645
Results per page

Guides & Articles

RCBOs Guide
There are many things to consider when choosing the right RCBO. Find out more in our comprehensive RCBOs guide.
Read more
Fuses Guide
Our fuses guide explains what they are, what they are used for, how they work, and the different types available.
Read more
Distribution Boards Guide
Our distribution boards guide explains what they are, their uses and types, and how to connect distribution boards.
Read more
MCBs Guide
What are MCBs and how do they work? Discover all you need to know in our comprehensive guide.
Read more

Related links