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

50 of 999+
Temporarily out of stock
Siemens 50A Slotted Tag Fuse, NH000, 690V
  • RS Stock No. 230-3017
  • Mfr. Part No. 3NE8717-1
Each (In a Pack of 10)
SGD93.852(exc. GST)
In Stock
Mersen 16A NH Fuse, NH000, 500V ac
  • RS Stock No. 270-3066
  • Mfr. Part No. K222097
Each (In a Box of 3)
SGD16.16(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. 269-917
  • Mfr. Part No. 3VA6115-6HN31-0AA0
Each
SGD2,381.90(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. 268-548
  • Mfr. Part No. 3VA6115-6JT31-2AA0
Each
SGD4,685.97(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 250A, Breaking Capacity 65 kA, DIN Rail Mount
  • RS Stock No. 245-119
  • Mfr. Part No. NJGF36250TW
Each
SGD2,271.29(exc. GST)
In Stock
Eaton RCD, 25A, 2 Pole, 30mA, Type A
  • RS Stock No. 922-8642
  • Mfr. Part No. 235424 PFIM-25/2/003-A-MW
Each
SGD168.98(exc. GST)
In Stock
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti 9 Range
  • RS Stock No. 790-9452
  • Mfr. Part No. A9D56620
Each
SGD351.08(exc. GST)
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 400A, Breaking Capacity 50kA
  • RS Stock No. 260-9791
  • Mfr. Part No. LV540510
Each
SGD1,144.82(exc. GST)
In Stock
Mersen 5A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2941
  • Mfr. Part No. X1014573
1 Box of 10
SGD194.09(exc. GST)
In Stock
Better World
Schneider Electric iID RCCB, 25A, 2 Pole, 30mA
  • RS Stock No. 734-9125
  • Mfr. Part No. A9R11225
Each
SGD277.71(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 160A, Fixed Mount
  • RS Stock No. 254-6343
  • Mfr. Part No. C16F34V160
Each
SGD3,950.92(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-7807
  • Mfr. Part No. C16N3TM160
Each
SGD1,867.73(exc. GST)
In Stock
Schneider Electric RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Resi9 Range
  • RS Stock No. 212-021
  • Mfr. Part No. R9D01606
Each
SGD123.18(exc. GST)
In Stock
RS PRO 10A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 420-218
Each (In a Pack of 10)
SGD2.583(exc. GST)
In Stock
RS PRO 3.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8132
Each (In a Pack of 20)
SGD0.627(exc. GST)
Last RS stock
Mersen 10A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0600
  • Mfr. Part No. A1014576 / FR10GR69V10
Each
SGD18.69(exc. GST)
In Stock
Eaton RCD, 16A, 2 Pole, 30mA, Type C
  • RS Stock No. 922-8721
  • Mfr. Part No. 236217 PKNM-16/1N/C/003-A-MW
Each
SGD211.23(exc. GST)
In Stock
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6949
  • Mfr. Part No. 2CSR275080R1164 DS201 M C16 AC30
Each
SGD170.58(exc. GST)
In Stock
Schurter Tin Plated Brass PCB Mount Fuse Clip for 5 x 20mm
  • RS Stock No. 484-8272
  • Mfr. Part No. 0751.0142
Each (In a Pack of 20)
SGD1.151(exc. GST)
In Stock
Schneider Electric ComPacT NSX Rotary Handle for use with NSX630
  • RS Stock No. 272-7479
  • Mfr. Part No. LV432600T
Each
SGD456.11(exc. GST)
1
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