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

46578 Products showing for Fuses & Circuit Breakers

267 / 999+
In Stock
Wickmann PC Board Non Resettable Fuse, Radial 630mA, 250V ac
  • RS Stock No. 296-3284
  • Mfr. Part No. 3720630000
Each (In a Pack of 10)
MYR3.131
In Stock
Better World
Siemens Sentron 5SY4 MCB, 3P, 32A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2119
  • Mfr. Part No. 5SY4332-6
Each
MYR686.17
In Stock
RS PRO MCB, 1P, 6A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0193
Each
MYR44.06
In Stock
Eaton 20A Inline Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 849-5591
  • Mfr. Part No. HFA-R
Each
MYR219.18
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7925
  • Mfr. Part No. C25H4TM160
Each
MYR11,583.77
Temporarily out of stock
Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 3 kA, Fixed Mount
  • RS Stock No. 252-745
  • Mfr. Part No. 193368 NZMH2-4-AX250
Each
MYR10,429.69
In Stock
ABB PS1 3 Phase Busbar, 690V ac, 17.5mm Pitch
  • RS Stock No. 711-6492
  • Mfr. Part No. 1SAM201906R1102 PS1-2-0-65
Each
MYR73.66
In Stock
Eaton 6.3A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V
  • RS Stock No. 311-0021
  • Mfr. Part No. HTC-50M
Each (In a Pack of 5)
MYR18.17
In Stock
Littelfuse 0.75A Resettable Fuse, 6V dc
  • RS Stock No. 624-3152P
  • Mfr. Part No. NANOSMDC075F-2
Each (Supplied on a Reel)
MYR2.109
Temporarily out of stock
Eaton 80A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1548
  • Mfr. Part No. XS80
Each (In a Box of 10)
MYR324.961
In Stock
Wickmann Resettable Fuse, 125V ac/dc
  • RS Stock No. 174-0678
  • Mfr. Part No. 0251004.MRT1L
Each (In a Pack of 10)
MYR3.366
Temporarily out of stock
Eaton 6A Bolted Tag Fuse, 1.2 kV ac, 660V dc, 124mm
  • RS Stock No. 181-8434
  • Mfr. Part No. TAC6
Each (In a Box of 10)
MYR216.564
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0329
  • Mfr. Part No. 8GK1082-3KK21
Each
MYR4,918.74
Temporarily out of stock
ABB Tmax XT Motor Operator for use with Tmax XT
  • RS Stock No. 237-6086
  • Mfr. Part No. 1SDA066468R1 MOE XT2-XT4 480...525VAC
Each
MYR4,238.06
In Stock
Lovato 50A Base Mount Fuse Holder for 14 x 51mm Fuse, 1P, 690V ac
  • RS Stock No. 188-1622
  • Mfr. Part No. FB02A1P
Each
MYR94.77
In Stock
Better World
Schneider Electric TeSys Deca Motor Protection Circuit Breaker - 3 Pole 690V Voltage Rating, 40A Current Rating
  • RS Stock No. 256-4178
  • Mfr. Part No. GV3P401
Each
MYR1,333.36
In Stock
Better World
Schneider Electric RCBO, 40A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 239-9966
  • Mfr. Part No. A9DX3640
Each
MYR2,524.01
In Stock
Eaton 63A DIII Bottle Fuse, gR, 500V
  • RS Stock No. 228-893
  • Mfr. Part No. 63D33R FUSE-D2 63A F GR 500VAC E33
1 Pack of 5
MYR325.92
In Stock
Sato Parts 5A PCB Mount Fuse Holder for 5 x 20mm Fuse, 125V ac
  • RS Stock No. 523-4949
  • Mfr. Part No. F-60-C
Each
MYR3.64
In Stock
Eaton 100A Bolted Tag Fuse, A3, 500V ac, 73mm
  • RS Stock No. 181-8663
  • Mfr. Part No. BAO100
Each
MYR107.10
1
267
2329
Results per page

Related links