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

75 of 999+
Temporarily out of stock
ABB F200 RCCB, 80A, 4 Pole, 300mA, Type AC, 230V ac
  • RS Stock No. 225-6121
  • Mfr. Part No. 2CSF204001R3800 F204 AC-80/0,3
Each
SGD495.46(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Connector Monoconnect for use with Acti 9/Multi 9, Horizontal Comb Busbar for 18 mm Pitch
  • RS Stock No. 806-7405
  • Mfr. Part No. A9XPCM04
Each
SGD47.52(exc. GST)
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 20 kA, Fixed Mount
  • RS Stock No. 232-0088
  • Mfr. Part No. 1SDA054396R1 T5N630 FF PR221-LS 630A
Each
SGD2,324.08(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 2P, 32A, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-609
  • Mfr. Part No. 2CDS272061R0538
Each
SGD406.39(exc. GST)
Temporarily out of stock
Eaton 380 → 440V ac/dc Shunt Trip Shunt trip for use with N(S)1(-4) Series, NZM1(-4) Series
  • RS Stock No. 454-8225
  • Mfr. Part No. 259728 NZM1-XA380-440AC/DC
Each
SGD184.39(exc. GST)
Being discontinued
RS PRO 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-621
Each (In a Pack of 10)
SGD0.466(exc. GST)
Temporarily out of stock
ABB Shunt Trip Shunt trip for use with S200U, S200UP
  • RS Stock No. 203-766
  • Mfr. Part No. 2CDS200908R0002
Each
SGD187.34(exc. GST)
In Stock
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, System Pro M Compact Range
  • RS Stock No. 201-6959
  • Mfr. Part No. 2CSR275180R1165 DS201 M B16 A30
Each
SGD302.01(exc. GST)
Temporarily out of stock
Eaton xComfort Distribution Board Enclosure, 18 Way
  • RS Stock No. 257-866
  • Mfr. Part No. 281692 BC-O-1/18-TW-ECO
Each
SGD113.76(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 36 kA
  • RS Stock No. 209-6955
  • Mfr. Part No. 3VA1010-4ED32-0AA0
Each
SGD675.98(exc. GST)
Temporarily out of stock
Legrand 32A M Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 266-3153
  • Mfr. Part No. 0 150 32
1 Box of 10
SGD117.61(exc. GST)
In Stock
ABB F200 RCCB, 40A, 2 Pole, 30mA, Type B, 230V
  • RS Stock No. 289-1618
  • Mfr. Part No. 2CSF202568R1400
Each
SGD711.32(exc. GST)
In Stock
Eaton RCD, 40A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 922-8654
  • Mfr. Part No. 235427 PFIM-40/2/003-A-MW
Each
SGD259.73(exc. GST)
In Stock
Littelfuse 440mA F Ceramic Cartridge Fuse, 10 x 35mm
  • RS Stock No. 738-3194
  • Mfr. Part No. 0FLU.440T
Each
SGD59.95(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 63A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2364
  • Mfr. Part No. M9F22163
Each
SGD62.10(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 45A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-744
  • Mfr. Part No. 3VA5245-6ED31-0AA0
Each
SGD1,320.17(exc. GST)
In Stock
Eaton xPole PXL, S200 MCB, 2P, 6A Curve C, 400V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 490-103
  • Mfr. Part No. 236278 PXL-C6/2
Each
SGD102.43(exc. GST)
Temporarily out of stock
Socomec 125A F Cartridge Fuse, 22 x 58mm
  • RS Stock No. 223-2852
  • Mfr. Part No. 60630125
Each (In a Pack of 10)
SGD15.951(exc. GST)
In Stock
ABB 25A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9952
  • Mfr. Part No. OFAF000H25 1SCA022627R0820
Each
SGD8.92(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 63A Curve C, 400V AC, 110V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7829
  • Mfr. Part No. 2CDS254001R0634 S204-C63
Each
SGD228.82(exc. GST)
1
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