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
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

58 / 999+
In Stock
Eaton PKZ0 Circuit Breaker for use with PKZM0, PKZM4
  • RS Stock No. 272-7215
  • Mfr. Part No. 106137 PKZ0-XRH-MCC
Each
MYR428.97
In Stock
Eaton 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 852-6923
  • Mfr. Part No. HTB-34M-R
Each
MYR52.77
In Stock
Littelfuse 8A Resettable Fuse, 30V dc
  • RS Stock No. 517-6887
  • Mfr. Part No. RUEF800
Each (In a Pack of 10)
MYR3.752
In Stock
Better World
Schneider Electric Acti 9 C120N MCB, 3P, 100A Curve C, 440V AC, 375V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3073
  • Mfr. Part No. A9N18367
Each
MYR648.34
In Stock
RS PRO Earthing Kit
  • RS Stock No. 528-983
Each
MYR85.11
In Stock
TE Connectivity Thermal Circuit Breaker - W23 Single Pole 50 V dc, 250V ac Voltage Rating, 50A Current Rating
  • RS Stock No. 782-0882
  • Mfr. Part No. W23-X1A1G-50
Each
MYR204.35
In Stock
Eaton 3.15A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1414
  • Mfr. Part No. S501-3.15-R
Each (In a Pack of 10)
MYR1.978
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 80A, Breaking Capacity 25kA
  • RS Stock No. 260-9726
  • Mfr. Part No. LV510316
Each
MYR3,706.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3808
  • Mfr. Part No. 3VA2440-5MN32-0AA0
Each
MYR11,760.54
In Stock
Schurter Through-Hole Fuse, Radial 500mA, 60V dc
  • RS Stock No. 270-7980
  • Mfr. Part No. PFRA.050
Each
MYR3.69
Temporarily out of stock
Better World
Schneider Electric ID RCCB, 40A, 4 Pole, 30mA, Type AC, 415V ac
  • RS Stock No. 214-2097
  • Mfr. Part No. M9R11440
Each
MYR1,163.61
Temporarily out of stock
ABB S800PV MCB, 4P, 40A Curve B, 1500V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5947
  • Mfr. Part No. 2CCF019628R0001 S804PV-SP40 - 5 kA
Each
MYR2,586.11
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1680
  • Mfr. Part No. 3VA1180-5EF46-0AA0
Each
MYR3,001.99
In Stock
Schurter 20A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 712-4787
  • Mfr. Part No. 0090.0020
Each
MYR62.62
In Stock
Mersen NH Fuse Puller, Sizes 00 → 3
  • RS Stock No. 136-0623
  • Mfr. Part No. P215592 / NHHANDLE
Each
MYR276.85
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 25A, Breaking Capacity 25kA
  • RS Stock No. 260-9720
  • Mfr. Part No. LV510311
Each
MYR2,634.49
In Stock
ETI 35A DIII Diazed Fuse, E33 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-743
  • Mfr. Part No. 2313401
Each (In a Pack of 5)
MYR7.722
In Stock
Schurter 2A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7904
  • Mfr. Part No. 0001.1007
Each (In a Pack of 10)
MYR2.603
In Stock
SIBA 1.6A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3305
  • Mfr. Part No. 70-007-65/1.6A
Each (In a Pack of 10)
MYR1.535
In Stock
Eaton, xEnergy MCCB 3P 160A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 628-8032
  • Mfr. Part No. 259092 NZMN2-A160
1 Box of 1
MYR4,836.25
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