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

44 of 999+
Temporarily out of stock
Hager RCD, 40A, 2 Pole, 30mA
  • RS Stock No. 144-4844
  • Mfr. Part No. BDC240F
Each
SGD336.15(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-317
  • Mfr. Part No. 3VA5220-7EF31-2AA0
Each
SGD2,060.52(exc. GST)
In Stock
Mersen 1A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2695
  • Mfr. Part No. B212061
1 Box of 10
SGD35.85(exc. GST)
In Stock
Eaton 20A Rail Mount Fuse Holder, 1P, 460 V dc, 660 → 690V ac
  • RS Stock No. 182-1433
  • Mfr. Part No. RS20P-GGY
Each (In a Box of 10)
SGD74.841(exc. GST)
In Stock
Eaton RCD, 40A, 2 Pole, 30mA, Type C
  • RS Stock No. 922-8755
  • Mfr. Part No. 236334 PKNM-40/1N/C/003-MW
Each
SGD245.52(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 40A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7609
  • Mfr. Part No. 2CDS253001R0405 S203-B40
Each
SGD71.48(exc. GST)
Temporarily out of stock
ABB S800U MCB, 2P, 25A, Type Z, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-904
  • Mfr. Part No. 2CCS862017R0255
Each
SGD380.59(exc. GST)
In Stock
Hager Electronic Circuit Breaker 16A MFS, 1 channels
  • RS Stock No. 251-2068
  • Mfr. Part No. MFS716
Each (In a Pack of 12)
SGD35.308(exc. GST)
In Stock
Eaton 15A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-330
  • Mfr. Part No. TDC10-15A
Each (In a Pack of 10)
SGD1.047(exc. GST)
In Stock
Contactum A Type RCD RCCB, 100A, 4 Pole, 100mA, Type A, 220 → 415V ac
  • RS Stock No. 240-6405
  • Mfr. Part No. CPR100010A
Each
SGD130.07(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-859
  • Mfr. Part No. 3VA6115-6KT31-0AA0
Each
SGD4,141.09(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 268-606
  • Mfr. Part No. 3VA6115-6HN31-2AA0
Each
SGD2,693.26(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 250A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 256-603
  • Mfr. Part No. 3VA5325-6EC31-1AA0
Each
SGD2,864.51(exc. GST)
In Stock
Littelfuse 60A Yellow BF1 Car Fuse, 32V dc
  • RS Stock No. 431-6719
  • Mfr. Part No. 153.5631.5601
Each (In a Pack of 5)
SGD4.87(exc. GST)
Temporarily out of stock
RS PRO 3A Violet Blade Car Fuse, 32V dc
  • RS Stock No. 177-8133
Each (In a Pack of 50)
SGD0.358(exc. GST)
Being discontinued
RS PRO PC Board Non Resettable Fuse, Axial 500mA, 125V ac/dc
  • RS Stock No. 764-9457
Each (In a Pack of 10)
SGD0.785(exc. GST)
In Stock
Littelfuse 210A Base Mount Fuse Holder for ATO Fuse
  • RS Stock No. 894-9622
  • Mfr. Part No. PDM61001ZXM
Each
SGD43.54(exc. GST)
In Stock
Littelfuse 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 738-2788
  • Mfr. Part No. 0218001.MXP
Each (In a Pack of 10)
SGD0.885(exc. GST)
In Stock
ABB F200 RCCB, 16A, 2 Pole, 10mA, Type AC, 230V ac
  • RS Stock No. 231-9897
  • Mfr. Part No. 2CSF202001R0160 F202 AC-16/0.01
Each
SGD282.61(exc. GST)
In Stock
Schneider Electric Multi9 M9F1 MCB, 1P, 10A Curve B, 415V AC, 72V DC, 3 kA Breaking Capacity
  • RS Stock No. 212-122
  • Mfr. Part No. M9F10110
Each
SGD36.24(exc. GST)
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