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
Circuit Protection & Circuit Breakers
Circuit Protection & Circuit Breakers
Consumer Units & Accessories
Consumer Units & Accessories

Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuse Tools & Testing
Fuse Tools & Testing
Fuses
Fuses
Fuses - PCB
Fuses - PCB

64001 Products showing for Fuses & Circuit Breakers

1 of 999+
Stock information currently inaccessible
RS Better World
Siemens, SENTRON, 3VA2 Molded Case Circuit Breaker 3-Pole 40 A, Breaking Capacity 85 kA
  • RS Stock No. 209-7071
  • Mfr. Part No. 3VA2140-6KP32-0AA0
Subtotal (1 unit)
CHF.1'036.27(exc. VAT)
CHF.1'036.27/unit
Stock information currently inaccessible
ETA ESX10 ESX10-T Electronic Circuit Breaker 10 A 24 V, 1 channels, Plug-in
  • RS Stock No. 210-2129
  • Mfr. Part No. ESX10-TB-101-DC24V-10A-E
Subtotal (1 unit)
CHF.94.74(exc. VAT)
CHF.94.74/unit
Stock information currently inaccessible
RS Better World
Siemens, SENTRON, 3VA1 Molded Case Circuit Breaker 3-Pole 200 A, Breaking Capacity 70 kA
  • RS Stock No. 209-7029
  • Mfr. Part No. 3VA1220-6EF32-0AA0
Subtotal (1 unit)
CHF.650.25(exc. VAT)
CHF.650.25/unit
Stock information currently inaccessible
ABB Residual Current Circuit Breaker with Overload Protection, 32 A Current Rating, 2-Pole, 100 mA Trip Sensitivity,
  • RS Stock No. 201-6891
  • Mfr. Part No. 2CSR255080R2325
Subtotal (1 unit)
CHF.112.78(exc. VAT)
CHF.112.78/unit
Stock information currently inaccessible
RS Better World
Siemens, SENTRON, 3VA1 Molded Case Circuit Breaker 3-Pole 100 A, Breaking Capacity 55 kA
  • RS Stock No. 209-6749
  • Mfr. Part No. 3VA1110-5EE36-0AA0
Subtotal (1 unit)
CHF.266.37(exc. VAT)
CHF.266.37/unit
Stock information currently inaccessible
Siemens 25A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 203-2174
  • Mfr. Part No. 3NA7810
Subtotal (3 units, in packs of 3)
CHF.49.779(exc. VAT)
CHF.16.593/unit
Stock information currently inaccessible
Phoenix Contact 1 Phase Surge Protector, 50 kA, DIN Rail
  • RS Stock No. 201-6559
  • Mfr. Part No. 2907388
Subtotal (1 unit)
CHF.495.27(exc. VAT)
CHF.495.27/unit
Stock information currently inaccessible
RS Better World
Siemens, SENTRON, SENTRON Molded Case Circuit Breaker 4-Pole 16 A, Breaking Capacity 7 kA, Fixed
  • RS Stock No. 209-5057
  • Mfr. Part No. 3VA1196-4EE42-0AA0
Subtotal (1 unit)
CHF.247.04(exc. VAT)
CHF.247.04/unit
Stock information currently inaccessible
Siemens SENTRON 5SL4 Miniature Circuit Breaker, 3-Pole, 40 A, Type C, 400 V ac AC, 72 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5997
  • Mfr. Part No. 5SL4640-7
Subtotal (1 unit)
CHF.147.20(exc. VAT)
CHF.147.20/unit
Stock information currently inaccessible
ABB, XT1B, 1SD Circuit Breaker 3-Pole 40 A, Breaking Capacity 18 kA
  • RS Stock No. 721-351
  • Mfr. Part No. 1SDA066803R1
Subtotal (1 unit)
CHF.139.99(exc. VAT)
CHF.139.99/unit
Stock information currently inaccessible
RS Better World
Siemens, SENTRON, 3VA Molded Case Circuit Breaker 3-Pole 160 A, Breaking Capacity 3 kA, Fixed
  • RS Stock No. 209-5183
  • Mfr. Part No. 3VA2216-5HN32-0AA0
Subtotal (1 unit)
CHF.1'011.58(exc. VAT)
CHF.1'011.58/unit
Stock information currently inaccessible
Bulgin 10A Inline Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 204-8118
  • Mfr. Part No. FX0380/BK
Subtotal (300 units, in boxes of 300)
CHF.958.20(exc. VAT)
CHF.3.194/unit
Stock information currently inaccessible
Eaton Residual Current Circuit Breaker with Overload Protection, 32 A Current Rating, 1-Pole, 30 mA Trip Sensitivity,
  • RS Stock No. 203-9037
  • Mfr. Part No. 236967 PXK-C32/1N/003-A
Subtotal (1 unit)
CHF.142.45(exc. VAT)
CHF.142.45/unit
Stock information currently inaccessible
Siemens SENTRON 5SV6 Miniature Circuit Breaker, 2-Pole, 25 A, Class B, 230 V ac AC, 6 kA Breaking Capacity
  • RS Stock No. 209-7512
  • Mfr. Part No. 5SV6016-6GV25
Subtotal (12 units, in packs of 12)
CHF.2'104.524(exc. VAT)
CHF.175.377/unit
Stock information currently inaccessible
Siemens SENTRON 5SL4 Miniature Circuit Breaker, 3-Pole, 1 A, Type B, 400 V ac AC, 72 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 210-3367
  • Mfr. Part No. 5SL4401-6
Subtotal (1 unit)
CHF.147.38(exc. VAT)
CHF.147.38/unit
Stock information currently inaccessible
Siemens SENTRON 5SV6 Fire Safety Circuit Breaker, 1-Pole, 16 A, Type B, 230 V ac AC, 6 kA Breaking Capacity
  • RS Stock No. 199-5121
  • Mfr. Part No. 5SV6016-6KP16
Subtotal (1 unit)
CHF.171.41(exc. VAT)
CHF.171.41/unit
Stock information currently inaccessible
RS Better World
Siemens, SENTRON, 3VA1 Molded Case Circuit Breaker 3-Pole 160 A, Breaking Capacity 70 kA
  • RS Stock No. 209-6875
  • Mfr. Part No. 3VA1216-6EF32-0AA0
Subtotal (1 unit)
CHF.645.13(exc. VAT)
CHF.645.13/unit
Stock information currently inaccessible
RS Better World
Siemens, SENTRON, SENTRON Molded Case Circuit Breaker 4-Pole 20 A, Breaking Capacity 7 kA, Surface
  • RS Stock No. 210-1635
  • Mfr. Part No. 3VA1120-5ED42-0AA0
Subtotal (1 unit)
CHF.258.03(exc. VAT)
CHF.258.03/unit
Stock information currently inaccessible
ABB, XT2N, XT2 Molded Case Circuit Breaker 3-Pole 100 A, Breaking Capacity 65 kA
  • RS Stock No. 721-458
  • Mfr. Part No. 1SDA067057R1
Subtotal (1 unit)
CHF.336.09(exc. VAT)
CHF.336.09/unit
Stock information currently inaccessible
Siemens Alpha Assembly Kit for use with Unequipped Distribution Boards
  • RS Stock No. 209-7088
  • Mfr. Part No. 8GK4402-2KK12
Subtotal (1 unit)
CHF.158.16(exc. VAT)
CHF.158.16/unit
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