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

2455 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9575
  • Mfr. Part No. 3VA10253ED460AA0
Each
SGD692.48(exc. GST)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - PR21 2 Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0444
  • Mfr. Part No. PR21-62-10.0A-XX-V
1 Box of 5
SGD347.83(exc. GST)
Temporarily out of stock
Siemens SENTRON Interlock for use with 3VA51-54, 3VA61-64
  • RS Stock No. 161-604
  • Mfr. Part No. 3VA9078-0VK10
Each
SGD182.94(exc. GST)
Temporarily out of stock
Eaton NZM Electronic Circuit Breaker 60A NZM, 4 channels , Fixed
  • RS Stock No. 120-162
  • Mfr. Part No. 153392 NZMH2-4-AF60-BT-NA
Each
SGD2,394.33(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9776
  • Mfr. Part No. 3VA1116-4GD42-0AA0
Each
SGD1,613.57(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 25A, Breaking Capacity 35 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-320
  • Mfr. Part No. 3VA5125-5ED31-1AA0
Each
SGD453.61(exc. GST)
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3+N, 8A Curve K
  • RS Stock No. 237-3288
  • Mfr. Part No. 2CDS253103R0407
Each
SGD300.45(exc. GST)
Temporarily out of stock
Better World
Schneider Electric RCBO, 16A Current Rating, 3P+N Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3330
  • Mfr. Part No. A9DS5716
Each
SGD612.20(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3626
  • Mfr. Part No. 1SDA071602R1
Each
SGD12,219.77(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3624
  • Mfr. Part No. 1SDA071600R1
Each
SGD18,017.55(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-4982
  • Mfr. Part No. 3VA1140-4EF32-0AA0
Each
SGD575.59(exc. GST)
In Stock
Socomec 80A F Cartridge Fuse, 22 x 58mm
  • RS Stock No. 223-2761
  • Mfr. Part No. 170L2280
Each (In a Pack of 10)
SGD32.736(exc. GST)
Temporarily out of stock
Phoenix Contact 2A T Cartridge Fuse, 5 x 20mm
  • RS Stock No. 129-487
  • Mfr. Part No. 1207310
Each
SGD14.45(exc. GST)
Last RS stock
Eaton 80mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-0988
  • Mfr. Part No. S500-80-R
Each (In a Pack of 10)
SGD4.991(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-298
  • Mfr. Part No. 3VA5220-6GF41-0AA0
Each
SGD2,210.59(exc. GST)
In Stock
Mersen 50A Bolted Tag Fuse, A2, 460 V dc, 690V ac, 73mm
  • RS Stock No. 178-1098
  • Mfr. Part No. V1019263 / BTIA69V50
Each (In a Pack of 10)
SGD15.514(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3P, 25A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6492
  • Mfr. Part No. 5SL4325-8
Each
SGD299.97(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Door Sealing Frame for use with INX16…F, IZMX16…F
  • RS Stock No. 132-391
  • Mfr. Part No. 184136 IZMX-DEG16-F-1
Each
SGD255.92(exc. GST)
Temporarily out of stock
ABB S801S MCB, 1P, 6A Curve C, 400V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-469
  • Mfr. Part No. 2CCS861001R0064
Each
SGD202.04(exc. GST)
Temporarily out of stock
Wickmann PC Board Non Resettable Fuse, Radial 2A, 125V ac
  • RS Stock No. 226-0709P
  • Mfr. Part No. 3961200000
Each (Supplied as a Tape)
SGD1.581(exc. GST)
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