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

105 of 999+
In Stock
Littelfuse 6.3A PCB Mount Fuse Holder for 5 x 20 mm, 6.3 x 32 mm Fuse, 250V ac
  • RS Stock No. 769-0183
  • Mfr. Part No. 81100000005
Each (In a Pack of 5)
SGD3.704(exc. GST)
In Stock
Littelfuse 8A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0098
  • Mfr. Part No. 0313008.HXP
Each (In a Pack of 5)
SGD1.672(exc. GST)
In Stock
Siemens 35A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-1102
  • Mfr. Part No. 5SE2335
Each (In a Pack of 10)
SGD6.408(exc. GST)
In Stock
Wickmann PC Board Non Resettable Fuse, Radial 250mA, 250V ac
  • RS Stock No. 226-0529
  • Mfr. Part No. 3700250000
Each (In a Pack of 10)
SGD1.446(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON 5SY4 MCB, 1P, 4A, Type A, 10 kA Breaking Capacity
  • RS Stock No. 202-7061
  • Mfr. Part No. 5SY4104-5
Each
SGD93.50(exc. GST)
In Stock
Schneider Electric, ComPacT NSX MCCB 4P 160A, Fixed Mount
  • RS Stock No. 254-6346
  • Mfr. Part No. C16F4
Each
SGD900.78(exc. GST)
In Stock
Eaton 600mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7266
  • Mfr. Part No. MDL-6-10-R
Each
SGD5.99(exc. GST)
Being discontinued
RS PRO 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-738
Each (In a Pack of 10)
SGD0.579(exc. GST)
Temporarily out of stock
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7673
  • Mfr. Part No. 5TT4475-0
Each
SGD283.96(exc. GST)
In Stock
Eaton 160A Bolted Tag Fuse, 18 x 56mm, 240 V ac, 150V dc, 41.8mm
  • RS Stock No. 182-1605
  • Mfr. Part No. 160LET
Each
SGD24.16(exc. GST)
Temporarily out of stock
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-791
  • Mfr. Part No. A9DC4616
Each
SGD561.72(exc. GST)
In Stock
RS PRO 2.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6073
Each (In a Pack of 10)
SGD0.682(exc. GST)
Temporarily out of stock
Weidmüller Surge Arrester, 50kA, 1000V dc, Screw Mount Mount
  • RS Stock No. 285-5287
  • Mfr. Part No. 2755960000
Each
SGD662.07(exc. GST)
Currently unavailable
Better World
Schneider Electric Compact Mounting Adapter for use with USB maintenance interface
  • RS Stock No. 211-2679
  • Mfr. Part No. TRV00917
Each
SGD345.74(exc. GST)
In Stock
Better World
Schneider Electric Compact Nsx, Easypact Cvs Cover for use with Compact Nsx, Easypact Cvs
  • RS Stock No. 221-1214
  • Mfr. Part No. LV429515
Each
SGD42.66(exc. GST)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 10A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1303
  • Mfr. Part No. 5SY4210-7
Each
SGD158.40(exc. GST)
In Stock
Eaton RCD, 16A, 2 Pole, 10mA, Type AC
  • RS Stock No. 922-8591
  • Mfr. Part No. 235389 PFIM-16/2/001-MW
Each
SGD257.73(exc. GST)
In Stock
Better World
Schneider Electric TeSys GV5P MCB, 3P, 150A, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 188-4748
  • Mfr. Part No. GV5P150F
Each
SGD1,188.14(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Linergy Busbar, 690V, 60mm Pitch
  • RS Stock No. 211-2311
  • Mfr. Part No. LA9ZA32621
Each (In a Pack of 4)
SGD94.90(exc. GST)
In Stock
Allen Bradley MCB, 2P, 2A Curve C, 400V AC, 96V DC
  • RS Stock No. 254-6251
  • Mfr. Part No. 188-K2C020
Each
SGD30.56(exc. GST)
1
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