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

46640 Products showing for Fuses & Circuit Breakers

5 / 999+
Stocked by manufacturer
Siemens, SENTRON, 3VA5 Molded Case Circuit Breaker 4-Pole 150A, Breaking Capacity 10 kA, Fixed
  • RS Stock No. 147-980
  • Mfr. Part No. 3VA5215-7EF41-2AA0
Subtotal (1 unit)
MYR12,495.85
MYR12,495.85/unit
In Stock
Littelfuse Non-Resettable Fuse, Radial 50 mA, 125 V ac/dc
  • RS Stock No. 878-3233
  • Mfr. Part No. 0273.050H
Subtotal (1 unit)
MYR38.24
MYR38.24/unit
In Stock
RS PRO 3A T Glass Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 911-3405
Subtotal (1 pack of 10 units)
MYR20.25
MYR2.025/unit
In Stock
Eaton 3A F Glass Cartridge Fuse, 6.3 x 32 mm
  • RS Stock No. 848-2914
  • Mfr. Part No. BK-AGC-3-R
Subtotal (1 unit)
MYR1.88
MYR1.88/unit
Limited stock
Eaton 10A F Glass Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 537-0966
  • Mfr. Part No. S500-10-R
Subtotal (1 pack of 10 units)
MYR10.56
MYR1.056/unit
In Stock
ABB PS1 PS1 1 Phase Busbar, 400 V ac, 17.5 mm Pitch
  • RS Stock No. 489-6489
  • Mfr. Part No. 2CDL210001R1012
Subtotal (1 unit)
MYR39.97
MYR39.97/unit
Limited stock
Eaton 1A F Glass Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 537-1212
  • Mfr. Part No. S500-1-R
Subtotal (1 pack of 10 units)
MYR12.09
MYR1.209/unit
In Stock
Mersen 400A NH Fuse NH2
  • RS Stock No. 270-3089
  • Mfr. Part No. N232519 / NH2AM50V400
Subtotal (1 unit)
MYR198.12
MYR198.12/unit
Temporarily out of stock
ABB 30V ac/dc Shunt Trip Shunt Trip for use with Tmax XT4, Tmax XT3, Tmax XT2, Tmax XT1
  • RS Stock No. 831-9194
  • Mfr. Part No. 1SDA066322R1 SOR-C XT1..XT4 F/P 24-30 Vac/dc
Subtotal (1 unit)
MYR621.93
MYR621.93/unit
In Stock
RS PRO NF12 Series Residual Current Circuit Breaker, 25A, 2-Pole, 30 mA, Type A 230V ac
  • RS Stock No. 284-2367
Subtotal (1 unit)
MYR209.45
MYR209.45/unit
Stocked by manufacturer
Schneider Electric, EasyPact, EZC400H Circuit Breaker 4-Pole 400A, Breaking Capacity 50 kA, Fixed
  • RS Stock No. 100-835
  • Mfr. Part No. EZC400H4400N
Subtotal (1 unit)
MYR5,325.03
MYR5,325.03/unit
In Stock
RS PRO DHMZ Miniature Circuit Breaker, 1-Pole, 6A, Type B, 240V ac AC, 240 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 265-0171
Subtotal (1 unit)
MYR25.42
MYR25.42/unit
In Stock
Siemens Alpha ALPHA Distribution Board 4 Way
  • RS Stock No. 211-6073
  • Mfr. Part No. 8GB1371-0
Subtotal (1 unit)
MYR126.87
MYR126.87/unit
Stocked by manufacturer
Better World
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 2-Pole, 16A, Type C, 100V, 12 V, 130 V, 220 V, 240 V, 380 V,
  • RS Stock No. 734-9295
  • Mfr. Part No. A9F87216
Subtotal (1 unit)
MYR1,073.58
MYR1,073.58/unit
In Stock
ABB Residual Current Circuit Breaker with Overload Protection, 16A Current Rating, 1-Pole, 30 mA Trip Sensitivity, Type
  • RS Stock No. 914-4058
  • Mfr. Part No. 2CSR255051R1165 DSE201 B16 AC30 - N Blue
Subtotal (1 unit)
MYR266.94
MYR266.94/unit
Stocked by manufacturer
Phoenix Contact EC-E EC-E4 Electronic Circuit Breaker 3A 24V, DIN Rail Tripping Method E (electronic)
  • RS Stock No. 131-326
  • Mfr. Part No. 0903034
Subtotal (1 pack of 6 units)
MYR2,457.90
MYR409.65/unit
In Stock
Better World
Schneider Electric Multi9 Multi9 Miniature Circuit Breaker, 1-Pole, 10A, Type C, 60 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 219-9119
  • Mfr. Part No. M9F22110
Subtotal (1 unit)
MYR218.88
MYR218.88/unit
Being discontinued
RS PRO 5A T Glass Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 563-532
Subtotal (1 pack of 10 units)
MYR16.75
MYR1.675/unit
In Stock
Littelfuse 150A Orange Car Fuse, 32V dc
  • RS Stock No. 787-4394
  • Mfr. Part No. 0298150.ZXEH
Subtotal (1 unit)
MYR33.04
MYR33.04/unit
Limited stock
Eaton 63A Centred Tag Fuse NH000 500V ac
  • RS Stock No. 703-8649
  • Mfr. Part No. 63NHG000B
Subtotal (1 unit)
MYR41.39
MYR41.39/unit
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