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

9 of 999+
In Stock
Phoenix Contact Surge Protector, 250V ac, DIN Rail Mount
  • RS Stock No. 801-6211
  • Mfr. Part No. 2950048
Each
SGD64.23(exc. GST)
In Stock
Better World
Schneider Electric Surge Protector, 24 → 250V dc, Clip-On Mount
  • RS Stock No. 817-5323
  • Mfr. Part No. LAD4DDL
Each
SGD51.21(exc. GST)
Temporarily out of stock
Eaton 80A Cartridge Fuse, 76 x 403mm
  • RS Stock No. 228-614
  • Mfr. Part No. 7.2WFNHO80 7.2KV 80A 3" MOTOR START FUSE
1 Pack of 3
SGD2,773.08(exc. GST)
Temporarily out of stock
Hager Auxiliary Contact, 2 Contact, 2NO, DIN, MZ9
  • RS Stock No. 251-2077
  • Mfr. Part No. MZ915
Each
SGD1,125.71(exc. GST)
Temporarily out of stock
Eaton 250mA T Nickel Plated Spring Brass (Terminal) Cartridge Fuse, 0.41 x 0.41in
  • RS Stock No. 228-686
  • Mfr. Part No. FNQ-1/4
1 Pack of 10
SGD867.66(exc. GST)
In Stock
Littelfuse PCB Mount Fuse Holder for ATO Fuse, 80V dc
  • RS Stock No. 787-4353
  • Mfr. Part No. 178.6164.0001
Each
SGD4.09(exc. GST)
Being discontinued
RS PRO 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-380
Each (In a Pack of 10)
SGD0.602(exc. GST)
In Stock
Legrand DX3 RCCB, 25A, 1+N Pole, 30mA, Type A
  • RS Stock No. 732-0115
  • Mfr. Part No. 4 116 37
Each
SGD250.37(exc. GST)
In Stock
Littelfuse 3A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 541-3035
  • Mfr. Part No. 0313003.MXP
Each (In a Pack of 10)
SGD1.315(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 1A, 250V ac
  • RS Stock No. 226-6549
  • Mfr. Part No. 37011000000
Each (In a Pack of 10)
SGD1.017(exc. GST)
In Stock
Eaton 25A Centred Tag Fuse, NH000, 690V ac
  • RS Stock No. 703-8778
  • Mfr. Part No. 25NHG000B-690
Each
SGD8.75(exc. GST)
In Stock
SIBA 315mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3289
  • Mfr. Part No. 70-007-65/0.315A
Each (In a Pack of 10)
SGD0.485(exc. GST)
In Stock
Eaton RCCB, 40A, 4 Pole, 100mA, Type A, 230/400V ac
  • RS Stock No. 922-8673
  • Mfr. Part No. 235440 PFIM-40/4/01-A-MW
Each
SGD211.97(exc. GST)
In Stock
RS PRO 10A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9844
Each (In a Pack of 10)
SGD0.824(exc. GST)
In Stock
ABB MCB, MCB Blank
  • RS Stock No. 136-7812
  • Mfr. Part No. 1TVC151800S2550
Each
SGD2.47(exc. GST)
In Stock
Schurter PC Board Non Resettable Fuse, Radial 250mA, 250V ac
  • RS Stock No. 284-5041
  • Mfr. Part No. 0034.6008
Each (In a Pack of 10)
SGD0.892(exc. GST)
In Stock
Eaton xEffect MCB, 3P, 63A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3419
  • Mfr. Part No. 278879 FAZ-C63/3
Each
SGD218.67(exc. GST)
In Stock
Siemens 4A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 226-2956
  • Mfr. Part No. 8WA1822-7EF23
Each (In a Pack of 10)
SGD3.577(exc. GST)
In Stock
RS PRO 750mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3385
Each (In a Pack of 10)
SGD0.612(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 10A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7567
  • Mfr. Part No. 2CDS252001R0105 S202-B10
Each
SGD69.94(exc. GST)
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