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

49110 Products showing for Fuses & Circuit Breakers

61 of 999+
Temporarily out of stock
ABB S800PV MCB, 2P, 40A Curve B, 800V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5923
  • Mfr. Part No. 2CCF019603R0001 S802PV-SP40 - 5 kA
Each
SGD382.03(exc. GST)
Temporarily out of stock
Eaton 500A Centred Tag Fuse, NH3, 690V ac
  • RS Stock No. 703-8807
  • Mfr. Part No. 500NHG3B-690
Each
SGD46.15(exc. GST)
Temporarily out of stock
Eaton 63A gG/gL Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 228-767
  • Mfr. Part No. C22G63 CYLINDRICAL FUSE 22 x 58 63A GG 690V AC
1 Pack of 10
SGD112.39(exc. GST)
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 63 A
  • RS Stock No. 117-003
  • Mfr. Part No. KV 8106
Each
SGD61.34(exc. GST)
Temporarily out of stock
Phoenix Contact Circuit Breaker - VARIOFACE 250V ac/dc Voltage Rating DIN Rail, 32A Current Rating
  • RS Stock No. 129-765
  • Mfr. Part No. 2302382
Each
SGD151.56(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 63A Curve C, 250V DC, 20 kA Breaking Capacity
  • RS Stock No. 776-3199
  • Mfr. Part No. A9N61519
Each
SGD94.84(exc. GST)
In Stock
ABB System Pro M Compact S200M MCB, 3P, 40A Curve B, 440V AC, 10 kA Breaking Capacity
  • RS Stock No. 535-6140
  • Mfr. Part No. 2CDS273001R0405 S203M-B40
Each
SGD154.06(exc. GST)
In Stock
Eaton 10A T Fibreglass Cartridge Fuse, 10 x 38mm
  • RS Stock No. 851-1659
  • Mfr. Part No. FNQ-10
Each
SGD68.63(exc. GST)
Temporarily out of stock
WAGO Electronic Circuit Breaker 10A 24V 787, 2 channels , DIN Rail
  • RS Stock No. 279-4093
  • Mfr. Part No. 787-1662/000-054
Each
SGD284.13(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 2P, 2A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 214-2060
  • Mfr. Part No. M9F11202
Each
SGD304.21(exc. GST)
Temporarily out of stock
ABB Tmax T Extended Front Terminal for use with MCCB
  • RS Stock No. 232-0125
  • Mfr. Part No. 1SDA055039R1 T5 8PCS
Each
SGD324.09(exc. GST)
Temporarily out of stock
Hager NFN MCB, 4P, 63A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4728
  • Mfr. Part No. NFN463
Each
SGD637.43(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 3140 3 Pole 230V Voltage Rating Snap In, 5A Current Rating
  • RS Stock No. 344-5361
  • Mfr. Part No. 3140-F130-P7T1-SGRX-5A
Each
SGD114.29(exc. GST)
In Stock
Schneider Electric, ComPacT MCCB 3P 400A, Fixed Mount
  • RS Stock No. 260-8121
  • Mfr. Part No. C40N3
Each
SGD2,114.19(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS Stock No. 226-0585
  • Mfr. Part No. 3721315000
Each (In a Pack of 10)
SGD0.635(exc. GST)
Temporarily out of stock
Allen Bradley, 140G MCCB 3P 125A, Module Frame Mount
  • RS Stock No. 261-2823
  • Mfr. Part No. 140G-G2C3-C70
Each
SGD498.38(exc. GST)
Last RS stock
Littelfuse 1.5A Resettable Fuse, 33V dc
  • RS Stock No. 867-5343
  • Mfr. Part No. SMD150F/33-2
Each (In a Bag of 10)
SGD0.638(exc. GST)
In Stock
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 3P, 32A Curve C, 415V AC, 10000 A Breaking Capacity
  • RS Stock No. 339-677
  • Mfr. Part No. SE10C332
Each
SGD190.56(exc. GST)
In Stock
ABB DDA202 RCD, 40A, 2 Pole, 30mA, 230V
  • RS Stock No. 231-9887
  • Mfr. Part No. 2CSB202001R1400 DDA202 AC-40/0.03
Each
SGD228.65(exc. GST)
In Stock
Socomec Fuse Holder Busbar
  • RS Stock No. 252-3743
  • Mfr. Part No. 17490001
Each
SGD8.05(exc. GST)
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