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

52 of 999+
Temporarily out of stock
Siemens SENTRON SENTRON 5SY4 MCB Mini Circuit Breaker, 1P, 35A Curve C, 400V AC, 60V DC, 5 kA Breaking Capacity
  • RS Stock No. 272-0243
  • Mfr. Part No. 5SY4100-7
Each
SGD69.16(exc. GST)
In Stock
Mersen 4A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-6962
  • Mfr. Part No. X213598
Each (In a Pack of 10)
SGD4.727(exc. GST)
In Stock
RS PRO 16A Rail Mount Fuse Holder, 600V ac
  • RS Stock No. 501-809
Each (In a Pack of 10)
SGD11.15(exc. GST)
In Stock
RS PRO 6A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3427
Each (In a Pack of 10)
SGD0.468(exc. GST)
In Stock
Eaton 3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3037
  • Mfr. Part No. BK-GMA-3-R
Each
SGD0.88(exc. GST)
In Stock
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 2A Current Rating
  • RS Stock No. 217-6368
  • Mfr. Part No. 2800870
Each
SGD151.49(exc. GST)
In Stock
Socomec 16A F Cartridge Fuse, 14 x 51mm
  • RS Stock No. 223-2830
  • Mfr. Part No. 60530016
Each (In a Pack of 10)
SGD7.872(exc. GST)
In Stock
ETI 25A Bottle Fuse Holder, 1P, 500V ac
  • RS Stock No. 289-8900
  • Mfr. Part No. DIIGAUGEKIT
Each
SGD12.65(exc. GST)
In Stock
Eaton 50A British Standard Fuse, FE, 690 V ac, 500V dc, 63.5mm
  • RS Stock No. 156-8967
  • Mfr. Part No. 50FE
Each
SGD72.85(exc. GST)
In Stock
Littelfuse 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8067
  • Mfr. Part No. 0219004.MXABP
Each (In a Bag of 10)
SGD1.499(exc. GST)
Being discontinued
RS PRO 15A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8139
Each (In a Pack of 50)
SGD0.453(exc. GST)
In Stock
Eaton 25A DII Bottle Fuse, E27 Thread Size, gG, 500V ac
  • RS Stock No. 181-8716
  • Mfr. Part No. 25D27
Each
SGD3.10(exc. GST)
In Stock
Eaton 20A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4267
  • Mfr. Part No. KTK-R-20
Each
SGD56.01(exc. GST)
Temporarily out of stock
Allen Bradley MCB, 2P, 32A Curve B, 400V AC, 96V DC
  • RS Stock No. 254-6250
  • Mfr. Part No. 188-K2B320
Each
SGD29.75(exc. GST)
Temporarily out of stock
ABB MCCB 4P 80A, Breaking Capacity 25 kA
  • RS Stock No. 192-0820
  • Mfr. Part No. 1SDA067405R1
Each
SGD629.78(exc. GST)
In Stock
Schneider Electric Resi9 R9E Circuit Breaker, 1P, 20A, 250V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8940
  • Mfr. Part No. R9ECT620
Each
SGD162.68(exc. GST)
Temporarily out of stock
Better World
ABB, XT3N MCCB 4P 125A, Fixed Mount
  • RS Stock No. 236-6580
  • Mfr. Part No. 1SDA068063R1 XT3N 250 TMD 125A 3P+N FF
Each
SGD1,211.77(exc. GST)
In Stock
Legrand DX3 RCD, 40A, 1+N Pole, 30mA, Type AC
  • RS Stock No. 732-0027
  • Mfr. Part No. 4 115 05
Each
SGD204.03(exc. GST)
In Stock
RS PRO 50A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3663
Each
SGD41.87(exc. GST)
In Stock
Eaton 50A British Standard Fuse, A3, 660V ac, 73mm
  • RS Stock No. 415-216
  • Mfr. Part No. TIS50
Each
SGD35.25(exc. GST)
1
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