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

50690 Products showing for Fuses & Circuit Breakers

9 of 999+
In Stock
RS PRO 8A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 721-1585
Each (In a Pack of 10)
R 21.209(exc. VAT)
In Stock
RS PRO 40A Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 188-4632
Each
R 414.25(exc. VAT)
In Stock
Siemens 6A Centred Tag Fuse, NH000, 690V
  • RS stock no. 210-6899
  • Mfr Part No. 3NA3801-6
Each (In a Pack of 3)
R 662.283(exc. VAT)
Unavailable
Schneider Electric Acti 9 iC60H MCB, 1P, 10A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 776-8781
  • Mfr Part No. A9F84110
Each
R 143.67(exc. VAT)
Being discontinued
RS PRO 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-532
Each (In a Pack of 10)
R 6.648(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 63A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3186
  • Mfr Part No. A9F53163
Each
R 851.92(exc. VAT)
In Stock
Eaton xEffect MCB, 1P, 16A Curve B, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS stock no. 922-6970
  • Mfr Part No. 278535 FAZ-B16/1
Each
R 591.24(exc. VAT)
In Stock
Eaton Eaton Moeller NZM Door Coupling Handle for use with N(S)1(-4), NZM1(-4), PN1(-4)
  • RS stock no. 255-551
  • Mfr Part No. 260166 NZM1-XTVD
Each
R 1,919.26(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 4A Curve C, 240V AC, 72V DC, 50 kA Breaking Capacity
  • RS stock no. 776-3449
  • Mfr Part No. A9F74104
Each
R 388.71(exc. VAT)
In Stock
RS PRO 8A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-497
Each (In a Pack of 10)
R 8.585(exc. VAT)
In Stock
Eaton 800A Centred Tag Fuse, NH3, 440V ac
  • RS stock no. 182-1729
  • Mfr Part No. 800NHG3B
Each
R 1,486.57(exc. VAT)
Temporarily out of stock
ABB Shunt Trip Shunt trip for use with Tmax XT1, Tmax XT2, Tmax XT3, Tmax XT4
  • RS stock no. 192-0919
  • Mfr Part No. 1SDA066314R1
Each
R 2,117.49(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 3130 Single Pole 50 V dc, 250V ac Voltage Rating Snap In, 5A Current Rating
  • RS stock no. 212-2130
  • Mfr Part No. 3130-F110-P7T1-W14QR7-5A
Each
R 738.40(exc. VAT)
Last RS stock
Eaton xEffect MCB, 2P, 6A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS stock no. 769-4719
  • Mfr Part No. 239100 FAZ6-C6/2
Each
R 1,470.70(exc. VAT)
In Stock
WJ Furse Lightning Earth Inspection Pit W. 300mm x 300mm H. 158mm 5000kg
  • RS stock no. 124-2510
  • Mfr Part No. 7TCA083320R0011 PT205
Each
R 1,443.99(exc. VAT)
In Stock
Eaton xEffect MCB, 1P, 16A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS stock no. 769-4560
  • Mfr Part No. 239037 FAZ6-C16/1
Each
R 534.98(exc. VAT)
In Stock
Eaton 6A T Cartridge Fuse, 21 x 57mm
  • RS stock no. 773-3536
  • Mfr Part No. LPJ-6SP
Each
R 1,322.27(exc. VAT)
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS stock no. 211-6051
  • Mfr Part No. 3VA2025-6KP36-0AA0
Each
R 23,615.50(exc. VAT)
Being discontinued
RS PRO 3.15A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-491
Each (In a Pack of 10)
R 6.648(exc. VAT)
In Stock
SIBA 2A F Ceramic Cartridge Fuse, 5 x 25mm
  • RS stock no. 267-3391
  • Mfr Part No. 70-010-04/2A
Each (In a Pack of 5)
R 101.21(exc. VAT)
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