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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

52724 Products showing for Fuses & Circuit Breakers

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In Stock
RS Better World
Siemens SENTRON 5SL4 Miniature Circuit Breaker, 1-Pole, 1A, Type C, 400V ac AC, 72 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5958
  • Mfr. Part No. 5SL4101-7
Subtotal (1 unit)
£22.45(exc. VAT)
£22.45/unit
In Stock
Legrand 4117 Series Residual Current Device, 63A, 3+N-Pole, 30 mA, Type A, 10 kA 400V ac
  • RS Stock No. 863-7764
  • Mfr. Part No. 4 117 61
Subtotal (1 unit)
£140.60(exc. VAT)
£140.60/unit
In Stock
Eaton xEffect xEffect Miniature Circuit Breaker, 1-Pole, 16A, Type C, 400V ac AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4560
  • Mfr. Part No. 239037 FAZ6-C16/1
Subtotal (1 unit)
£21.89(exc. VAT)
£21.89/unit
In Stock
RS Better World
Schneider Electric, ComPact NSX, ComPacT NSX250F Molded Case Circuit Breaker 3-Pole 250A, Breaking Capacity 36 kA, Fixed
  • RS Stock No. 254-6352
  • Mfr. Part No. C25F3
Subtotal (1 unit)
£446.90(exc. VAT)
£446.90/unit
In Stock
RS Better World
Siemens 5SV3 Series Residual Current Circuit Breaker, 63A, 4-Pole, 300 mA, Type A, 0.8 kA 400V ac
  • RS Stock No. 124-7743
  • Mfr. Part No. 5SV3646-6
Subtotal (1 unit)
£199.24(exc. VAT)
£199.24/unit
Stocked by manufacturer
Lovato P1RA Series Residual Current Circuit Breaker, 63A, 3-Pole, 30 mA, Type A 400V ac
  • RS Stock No. 188-1681
  • Mfr. Part No. P1RA3P63A030
Subtotal (1 unit)
£204.59(exc. VAT)
£204.59/unit
In Stock
Eaton Lockable xComfort IKA Eaton xComfort IKA professional Distribution Board, ABS Plastic, 8 Way
  • RS Stock No. 282-7020
  • Mfr. Part No. 174196 IKA-1/8-ST
Subtotal (1 unit)
£51.55(exc. VAT)
£51.55/unit
In Stock
Schneider Electric TeSys TeSyS GV Thermal Circuit Breaker -, 73A Current Rating 3-Pole, DIN Rail
  • RS Stock No. 188-4747
  • Mfr. Part No. GV3P73
Subtotal (1 unit)
£334.41(exc. VAT)
£334.41/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 1-Pole, 16A, Type C, 240V ac AC, 48 V dc DC, 10 kA Breaking
  • RS Stock No. 791-3297
  • Mfr. Part No. A9F54116
Subtotal (1 unit)
£26.13(exc. VAT)
£26.13/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 3-Pole, 16A, Type C, 12V, 133 V, 220 V, 240 V, 380 V, 415 V,
  • RS Stock No. 791-3382
  • Mfr. Part No. A9F54316
Subtotal (1 unit)
£115.41(exc. VAT)
£115.41/unit
In Stock
RS PRO 30A Rail Mount Fuse Holder
  • RS Stock No. 242-0497
Subtotal (1 bag of 10 units)
£30.72(exc. VAT)
£30.72/bag
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 3-Pole, 25A, Type C, 12V, 133 V, 220 V, 240 V, 380 V, 415 V,
  • RS Stock No. 791-3394
  • Mfr. Part No. A9F54325
Subtotal (1 unit)
£116.89(exc. VAT)
£116.89/unit
In Stock
Europa EUC2P EUC2P Miniature Circuit Breaker, 2-Pole, 2A, Type C, 400V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6531
  • Mfr. Part No. EUC2P2C
Subtotal (1 unit)
£12.79(exc. VAT)
£12.79/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 2-Pole, 4A, Type C, 12V, 133 V, 220 V, 240 V, 380 V, 415 V,
  • RS Stock No. 791-3338
  • Mfr. Part No. A9F54204
Subtotal (1 unit)
£93.78(exc. VAT)
£93.78/unit
In Stock
TE Connectivity W58 Thermal Circuit Breaker -, 10A Current Rating 1-Pole, Direct
  • RS Stock No. 782-0892
  • Mfr. Part No. W58-XB1A4A-10
Subtotal (1 unit)
£6.74(exc. VAT)
£6.74/unit
Stocked by manufacturer
Eaton Cover for use with NZM1(-4), PN1(-4), N(S)1(-4)
  • RS Stock No. 255-981
  • Mfr. Part No. 266741 NZM1-4-XKSA
Subtotal (1 unit)
£24.93(exc. VAT)
£24.93/unit
In Stock
Siemens Copper Alpha 8GK Busbar
  • RS Stock No. 226-0831
  • Mfr. Part No. 8GK9733-0KK10
Subtotal (1 unit)
£38.89(exc. VAT)
£38.89/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 1-Pole, 10A, Type C, 240V ac AC, 48 V dc DC, 10 kA Breaking
  • RS Stock No. 791-3293
  • Mfr. Part No. A9F54110
Subtotal (1 unit)
£26.13(exc. VAT)
£26.13/unit
In Stock
Schneider Electric Residual Current Circuit Breaker with Overload Protection, 16A Current Rating, 1-Pole, 30 mA Trip
  • RS Stock No. 790-9294
  • Mfr. Part No. A9D11816
Subtotal (1 unit)
£159.81(exc. VAT)
£159.81/unit
In Stock
Hager NFT Miniature Circuit Breaker, 1-Pole, 16A, 240V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4742
  • Mfr. Part No. NFT716
Subtotal (1 unit of 12 units)
£67.50(exc. VAT)
£67.50/unit
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