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

42 of 999+
In Stock
Allen Bradley 1492 1492-SPM MCB, 1P, 2A Curve C, 277V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 125-1452
  • Mfr. Part No. 1492-SPM1C020
Each
SGD113.39(exc. GST)
In Stock
Littelfuse 5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 787-4123
  • Mfr. Part No. 0297005.WXNV
Each (In a Pack of 10)
SGD0.368(exc. GST)
In Stock
Siemens 32A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 203-2029
  • Mfr. Part No. 3NW6012-1
Each (In a Pack of 20)
SGD8.389(exc. GST)
Temporarily out of stock
Eaton RCCB, 63A, 4 Pole, 100mA, Type A, 230 V ac, 400 V ac
  • RS Stock No. 227-0749
  • Mfr. Part No. 267462 PFGM-63/4/01-A
Each
SGD869.49(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 45A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 269-788
  • Mfr. Part No. 3VA5245-7ED31-2AA0
Each
SGD1,728.05(exc. GST)
In Stock
Europa EUR1 RCCB, 63A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 210-4756
  • Mfr. Part No. EUR163.30/2A
Each
SGD39.74(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-277
  • Mfr. Part No. 3VA5220-1MH31-0AA0
Each
SGD2,411.45(exc. GST)
In Stock
Siemens Fuse Puller Fuse Puller, Sizes 000 → 3in
  • RS Stock No. 282-4685
  • Mfr. Part No. 3NX1015
Each
SGD70.67(exc. GST)
In Stock
Schurter 3.15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4230P
  • Mfr. Part No. 8020.5016.G
Each (Supplied in a Bag)
SGD1.205(exc. GST)
In Stock
Eaton 10A Slow-Blow Cartridge Fuse, 10 x 38mm
  • RS Stock No. 228-663
  • Mfr. Part No. C10M10 CYLINDRICAL FUSE 10 x 38 10A AM 500V AC
1 Pack of 10
SGD17.97(exc. GST)
In Stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4281
  • Mfr. Part No. 3VA1163-3EF36-0AA0
Each
SGD789.64(exc. GST)
In Stock
Hager for use with KB263A Busbars, KB263C Busbars
  • RS Stock No. 144-4690
  • Mfr. Part No. KZ022
Each (In a Pack of 10)
SGD3.744(exc. GST)
In Stock
Schurter SMD Non Resettable Fuse 1.5A, 125V ac/dc
  • RS Stock No. 733-4870
  • Mfr. Part No. 3404.0115.22
Each (In a Bag of 5)
SGD0.928(exc. GST)
Temporarily out of stock
RS PRO 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-598
Each (In a Pack of 10)
SGD0.491(exc. GST)
In Stock
ABB RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6892
  • Mfr. Part No. 2CSR275180R1105 DS201 M B10 A30
Each
SGD259.32(exc. GST)
In Stock
Hager NGT MCB, 1+N, 40A, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4801
  • Mfr. Part No. NGT740
Each
SGD204.13(exc. GST)
In Stock
Eaton 32A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8431
  • Mfr. Part No. C14G32
Each (In a Pack of 10)
SGD2.479(exc. GST)
In Stock
Better World
Schneider Electric Compact Nsx, Compact Nsx Dc Plug In Kit for use with Compact Nsx 100/160/250
  • RS Stock No. 221-1181
  • Mfr. Part No. LV429289
Each
SGD513.69(exc. GST)
In Stock
Better World
ABB SN201 MCB, 1P, 6A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 237-1431
  • Mfr. Part No. 2CSS275101R0064
Each
SGD64.72(exc. GST)
Currently unavailable
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 6A Current Rating
  • RS Stock No. 210-2082
  • Mfr. Part No. 3120-N526-P7T1-W01D-6A-A04010611M
Each
SGD94.55(exc. GST)
1
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