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

862 Products showing for Fuses & Circuit Breakers

1 of 44
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 63A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 654-982
  • Mfr. Part No. C11F6TM063L
Subtotal (1 unit)
SGD855.66(exc. GST)
Temporarily out of stock
Hager CFB RCD Switch, 40A, 4 Pole, 300mA, Type B, 230 → 400V
  • RS Stock No. 599-754
  • Mfr. Part No. CFB740F
Subtotal (1 unit)
SGD1,629.28(exc. GST)
In Stock
Schneider Electric RCBO, 25A Current Rating, 1P+N Poles, 100mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-731
  • Mfr. Part No. A9D06825
Subtotal (1 unit)
SGD308.35(exc. GST)
Temporarily out of stock
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-794
  • Mfr. Part No. A9DF3620
Subtotal (1 unit)
SGD529.29(exc. GST)
In Stock
Schneider Electric RCBO, 10A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 790-9285
  • Mfr. Part No. A9D11810
Subtotal (1 unit)
SGD329.78(exc. GST)
Temporarily out of stock
Hager Hager HMD Circuit Breaker, 2P, 80A Curve D, 415V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-778
  • Mfr. Part No. HMD280
Subtotal (1 unit)
SGD605.52(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 A9F MCB Mini Circuit Breaker, 2P, 16A Curve C, 500V AC, 10 kA Breaking Capacity
  • RS Stock No. 653-861
  • Mfr. Part No. A9F74216
Subtotal (1 unit)
SGD127.95(exc. GST)
New product - Preorder today
Schneider Electric R9R RCCB, 40A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 654-662
  • Mfr. Part No. R9R22240
Subtotal (1 unit)
SGD164.95(exc. GST)
In Stock
Schneider Electric RCBO, 16A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 654-647
  • Mfr. Part No. A9D67416
Subtotal (1 unit)
SGD531.95(exc. GST)
Temporarily out of stock
Schneider Electric 1+N Phase Surge Arrester, 20kA, 1.4kV, DIN Rail Mount
  • RS Stock No. 654-748
  • Mfr. Part No. A9L20500
Subtotal (1 unit)
SGD583.88(exc. GST)
In Stock
Schneider Electric Multi9 M9F MCB Mini Circuit Breaker, 1P, 6A Curve D, 240V AC, 10 kA Breaking Capacity
  • RS Stock No. 654-531
  • Mfr. Part No. M9F12106
Subtotal (1 unit)
SGD69.75(exc. GST)
Limited stock
nVent ERICO Neutral Busbar Busbar
  • RS Stock No. 646-805
  • Mfr. Part No. 568678
Subtotal (1 unit)
SGD17.16(exc. GST)
Temporarily out of stock
Siemens 12A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 627-131
  • Mfr. Part No. 3NC1012-0MK
Subtotal (1 pack of 20 units)
SGD262.19(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 654-143
  • Mfr. Part No. C12F6TM160L
Subtotal (1 unit)
SGD1,867.69(exc. GST)
In Stock
RS PRO 2 A Ceramic Cartridge Fuse, 10 x 38 mm
  • RS Stock No. 199-237
Subtotal (1 pack of 10 units)
SGD346.24(exc. GST)
In Stock
RS PRO 15 A CC Ceramic Cartridge Fuse, 10 x 38 mm
  • RS Stock No. 199-238
Subtotal (1 pack of 10 units)
SGD431.99(exc. GST)
Temporarily out of stock
Schneider Electric A9R RCCB, 40A, 4 Pole, 30mA, Type AC, 380 → 415V ac
  • RS Stock No. 655-156
  • Mfr. Part No. A9R41440
Subtotal (1 unit)
SGD407.59(exc. GST)
Temporarily out of stock
Siemens 3A Cartridge Fuse, 10 X 38mm
  • RS Stock No. 665-112
  • Mfr. Part No. 3NW3030-0HG
Subtotal (1 pack of 10 units)
SGD244.69(exc. GST)
Temporarily out of stock
Siemens 6A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 627-088
  • Mfr. Part No. 3NC1006-0MK
Subtotal (1 pack of 20 units)
SGD281.56(exc. GST)
Temporarily out of stock
Hager Hager NEN Circuit Breaker, 1P, 63A Curve B, 230 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 599-900
  • Mfr. Part No. NEN163
Subtotal (1 unit)
SGD141.33(exc. GST)
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