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

51151 Products showing for Fuses & Circuit Breakers

1 of 999+
In Stock
RS PRO NF12 Series Residual Current Circuit Breaker, 63A, 2-Pole, 30 mA, Type A 230V ac
  • RS stock no. 284-2371
Subtotal (1 unit)
R 1 119,80(exc. VAT)
R 1 119,80/unit
Being discontinued
RS PRO 1A F Glass Cartridge Fuse, 5 x 20 mm
  • RS stock no. 563-380
Subtotal (1 pack of 10 units)
R 41,05(exc. VAT)
R 4,105/unit
In Stock
RS PRO 6.3A Panel Mount Fuse Holder for 5 x 20 mm, 25V
  • RS stock no. 563-784
Subtotal (1 unit)
R 77,55(exc. VAT)
R 77,55/unit
In Stock
RS PRO 2.5A T Glass Cartridge Fuse, 5 x 20 mm
  • RS stock no. 668-6004
Subtotal (1 pack of 10 units)
R 70,75(exc. VAT)
R 7,075/unit
In Stock
RS PRO 15 A In-line Fuse Holder, 32 V
  • RS stock no. 237-5266
Subtotal (1 unit)
R 81,10(exc. VAT)
R 81,10/unit
Last RS stock
Contactum CPB40 Miniature Circuit Breaker, 1-Pole, 40A, Type B, 250V ac AC, 6 kA Breaking Capacity
  • RS stock no. 184-9061
  • Mfr. Part No. CPB40
Subtotal (1 unit)
R 95,96(exc. VAT)
R 95,96/unit
In Stock
RS PRO 30 A In-line Fuse Holder for 19 x 18.6 mm, 32 V dc
  • RS stock no. 284-6489
Subtotal (1 pack of 5 units)
R 484,94(exc. VAT)
R 96,988/unit
In Stock
RS PRO Earthing Kit
  • RS stock no. 528-983
Subtotal (1 unit)
R 559,83(exc. VAT)
R 559,83/unit
In Stock
RS PRO 12.5A F Ceramic Cartridge Fuse, 6.3 x 32 mm
  • RS stock no. 209-9282
Subtotal (1 pack of 10 units)
R 172,45(exc. VAT)
R 17,245/unit
In Stock
RS PRO Fuse Kit
  • RS stock no. 918-2697
Subtotal (1 unit)
R 1 622,16(exc. VAT)
R 1 622,16/unit
In Stock
RS Better World
RS PRO 25A Fast Acting Ceramic Cartridge Fuse, 10 x 38 mm
  • RS stock no. 239-4983
Subtotal (1 pack of 10 units)
R 1 388,54(exc. VAT)
R 138,854/unit
In Stock
RS PRO 10 A In-line Fuse Holder for 5 x 20 mm, 250 V
  • RS stock no. 237-5259
Subtotal (1 unit)
R 51,84(exc. VAT)
R 51,84/unit
Limited stock
RS PRO Rail Mount Fuse Holder for 5 x 25 mm, 24V
  • RS stock no. 501-871
Subtotal (1 unit)
R 131,93(exc. VAT)
R 131,93/unit
In Stock
Schneider Electric Residual Current Circuit Breaker with Overload Protection, 16A Current Rating, 1-Pole, 30 mA Trip
  • RS stock no. 212-166
  • Mfr. Part No. A9D07616
Subtotal (1 unit)
R 1 519,01(exc. VAT)
R 1 519,01/unit
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38 mm, 1P-Pole, 1 kV ac/dc, 690V ac
  • RS stock no. 189-5338
  • Mfr. Part No. G1062721 / CUS101
Subtotal (1 unit)
R 194,42(exc. VAT)
R 194,42/unit
Limited stock
Wickmann Non-Resettable Fuse 10A, 125V
  • RS stock no. 174-0746
  • Mfr. Part No. 0453010.MR
Subtotal (1 pack of 5 units)
R 197,56(exc. VAT)
R 39,512/unit
In Stock
Littelfuse 20 A In-line Fuse Holder, 32 V dc
  • RS stock no. 787-4356
  • Mfr. Part No. FHAC0001ZXJG
Subtotal (1 unit)
R 116,14(exc. VAT)
R 116,14/unit
Being discontinued
RS PRO 3.15A T Glass Cartridge Fuse, 5 x 20 mm
  • RS stock no. 563-621
Subtotal (1 pack of 10 units)
R 63,64(exc. VAT)
R 6,364/unit
In Stock
RS PRO 4A T Glass Cartridge Fuse, 5 x 20 mm
  • RS stock no. 668-6001
Subtotal (1 pack of 10 units)
R 21,97(exc. VAT)
R 2,197/unit
In Stock
RS PRO 1.6A F Ceramic Cartridge Fuse, 6.3 x 32 mm
  • RS stock no. 721-1588
Subtotal (1 pack of 10 units)
R 315,44(exc. VAT)
R 31,544/unit
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