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

50687 Products showing for Fuses & Circuit Breakers

1 of 999+
Temporarily out of stock
200A Tag Fuse, 415V ac
  • RS stock no. 252-960
  • Mfr. Part No. 200MJ29-6
1 Pack of 5
R 4,669.60(exc. VAT)
In Stock
RS PRO Residential RCCBs, 63A, 2 Pole, 30mA, Type A, 230V
  • RS stock no. 284-2371
Each
R 922.75(exc. VAT)
Being discontinued
RS PRO 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-380
Each (In a Pack of 10)
R 4.105(exc. VAT)
Temporarily out of stock
ETA Thermal Circuit Breaker - 4130 Single Pole 240V Voltage Rating Panel Mount, 60A Current Rating
  • RS stock no. 405-9258
  • Mfr. Part No. 4130-G211-K4M1-60A
Each
R 915.90(exc. VAT)
In Stock
ETA ESX10 Electronic Circuit Breaker 6A 24V ESX10-T, 1 channels , DIN Rail Mount
  • RS stock no. 210-2140
  • Mfr. Part No. ESX10-TB-102-DC24V-6A-E
Each
R 2,097.78(exc. VAT)
In Stock
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)2(-4), NZM2(-4), PN2(-4)
  • RS stock no. 255-620
  • Mfr. Part No. 266627 NZM2-XHB
Each
R 2,599.52(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON 5SY8 MCB, 1P, 10A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS stock no. 209-6717
  • Mfr. Part No. 5SY8110-7
Each
R 1,058.42(exc. VAT)
In Stock
RS PRO Residential RCCBs, 40A, 2 Pole, 300mA, Type A, 230V
  • RS stock no. 284-2370
Each
R 1,488.60(exc. VAT)
In Stock
RS PRO 10 A Panel Mount Fuse Holder, 1P for 5 x 20 mm, 250 V
  • RS stock no. 277-3909
Each (In a Pack of 5)
R 42.01(exc. VAT)
Currently unavailable
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 1A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3275
  • Mfr. Part No. A9F54101
Each
R 554.65(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 3 channels
  • RS stock no. 157-382
  • Mfr. Part No. 3VA2116-8KQ36-0AA0
Each
R 34,349.49(exc. VAT)
Being discontinued
RS PRO 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 668-6057
Each (In a Pack of 10)
R 2.059(exc. VAT)
In Stock
RS PRO 6A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 177-8113
Each (In a Pack of 50)
R 8.268(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 5A Current Rating
  • RS stock no. 782-0915
  • Mfr. Part No. W58-XB1A4A-5
Each
R 154.25(exc. VAT)
In Stock
Better World
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 250A, Fixed Mount
  • RS stock no. 232-0281
  • Mfr. Part No. 1SDA068475R1 XT4S 250 Ekip LS/I 250A FF
Each
R 20,078.85(exc. VAT)
Being discontinued
RS PRO 5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 668-6045
Each (In a Pack of 10)
R 2.062(exc. VAT)
In Stock
RS PRO MCB, 1P, 2A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS stock no. 265-0190
Each
R 220.05(exc. VAT)
In Stock
RS PRO 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 668-6001
Each (In a Pack of 10)
R 2.197(exc. VAT)
In Stock
RS PRO 20A Yellow Blade Car Fuse, 32V dc
  • RS stock no. 563-762
Each (In a Pack of 10)
R 1.872(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 30 kA, Fixed Mount
  • RS stock no. 432-856
  • Mfr. Part No. C080N32EFM
Each
R 75,182.09(exc. VAT)
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