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

58 of 999+
In Stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 40A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-047
  • Mfr. Part No. 3RV2041-4FA10-0DA0
Each
SGD493.42(exc. GST)
In Stock
Finder 3 Phase Surge Protector, 60kA, 1.5kV, DIN Rail Mount
  • RS Stock No. 286-5004
  • Mfr. Part No. 7P1482751012
Each
SGD557.30(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 125A, Fixed Mount
  • RS Stock No. 254-6344
  • Mfr. Part No. C16F3TM125
Each
SGD1,310.68(exc. GST)
In Stock
Schurter 400mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-7477
  • Mfr. Part No. 0034.3113
Each (In a Pack of 100)
SGD0.388(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3+N, 20A Curve D
  • RS Stock No. 237-3270
  • Mfr. Part No. 2CDS253103R0201
Each
SGD376.81(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 32A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7630
  • Mfr. Part No. 2CDS254001R0325 S204-B32
Each
SGD228.76(exc. GST)
In Stock
Eaton 1.25A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1199
  • Mfr. Part No. S500-1.25-R
Each (In a Pack of 10)
SGD0.411(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 2P, 1A Curve D, 400V AC, 440V DC, 6 kA Breaking Capacity
  • RS Stock No. 186-3448
  • Mfr. Part No. 2CDS252001R0011 S202-D1
Each
SGD105.65(exc. GST)
In Stock
RS PRO 100A Solid Link for A4 Fuses
  • RS Stock No. 242-1077
Each
SGD16.47(exc. GST)
Temporarily out of stock
Hager NGN MCB, 2P, 20A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4763
  • Mfr. Part No. NGN220
Each
SGD179.95(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 3P, 16A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 214-2071
  • Mfr. Part No. M9F11316
Each
SGD352.68(exc. GST)
Temporarily out of stock
ABB 230 → 400V ac Isolator Circuit Trip for use with Commanding Load
  • RS Stock No. 225-5977
  • Mfr. Part No. 2CDE283001R0063
Each
SGD139.47(exc. GST)
Temporarily out of stock
Littelfuse PC Board Non Resettable Fuse, Radial 31mA, 125V ac/dc
  • RS Stock No. 878-1413
  • Mfr. Part No. 0273.031V
Each (In a Pack of 5)
SGD55.034(exc. GST)
In Stock
Littelfuse Non-Resettable Wire Ended Fuse 5A, 125V ac
  • RS Stock No. 738-2999P
  • Mfr. Part No. 0471005.NRT1L
Each (Supplied in a Bag)
SGD1.742(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 16A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3382
  • Mfr. Part No. A9F54316
Each
SGD206.59(exc. GST)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 200A, Breaking Capacity 15 kA, Fixed Mount
  • RS Stock No. 255-527
  • Mfr. Part No. 259102 NZMH2-A200
Each
SGD2,361.67(exc. GST)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 12A Current Rating
  • RS Stock No. 782-7962
  • Mfr. Part No. W58-XB1A4A-12
Each
SGD13.21(exc. GST)
Temporarily out of stock
Siemens RCBO, 100A Current Rating, 2P Poles, 300mA Trip Sensitivity, Type A, SENTRON Range
  • RS Stock No. 211-9581
  • Mfr. Part No. 5SM2627-8
Each
SGD788.89(exc. GST)
In Stock
WJ Furse Copper Earth Bar L. 125mm x W. 90mm x H. 90mm 2 Ways
  • RS Stock No. 124-2495
  • Mfr. Part No. 7TCA083670R0600 LK205
Each
SGD118.53(exc. GST)
Currently unavailable
Eaton PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS Stock No. 769-3277
  • Mfr. Part No. SR-5F-3-15A-BK
Each (In a Pack of 5)
SGD1.646(exc. GST)
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