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

317 / 999+
In Stock
ABB RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6937
  • Mfr. Part No. 2CSR255080R1204 DS201 C20 AC30
Each
MYR878.70
In Stock
Schurter 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7797
  • Mfr. Part No. 0001.2504
Each (In a Bag of 10)
MYR2.518
Limited stock
ABB SN201 MCB, 1+N, 1A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 191-9454
  • Mfr. Part No. 2CSS245102R0014
Each
MYR123.05
Temporarily out of stock
Better World
Schneider Electric 100A 22X58mm Fuse Block, 230 - 690V
  • RS Stock No. 219-8936
  • Mfr. Part No. KSB100SF4
Each
MYR3,051.87
Temporarily out of stock
RS PRO 20A Blade Fuse Block, 250V
  • RS Stock No. 188-4477
1 Box of 1000
MYR4,188.28
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 63 A
  • RS Stock No. 117-725
  • Mfr. Part No. KV PC 8109
Each
MYR283.98
In Stock
Siemens Surge Protector, Through Hole Mount
  • RS Stock No. 203-3918
  • Mfr. Part No. 3TX7402-3G
Each
MYR76.80
In Stock
Phoenix Contact 1.25A T Cartridge Fuse, 5 x 20mm
  • RS Stock No. 129-488
  • Mfr. Part No. 1208801
Each
MYR51.70
In Stock
Littelfuse SMD Non Resettable Fuse 3.15A, 125V
  • RS Stock No. 738-2902
  • Mfr. Part No. 04513.15MRL
Each (In a Pack of 10)
MYR4.346
In Stock
Mersen Fuse Holder Multi-Pole Assembly Kit
  • RS Stock No. 376-8995
  • Mfr. Part No. Z218223
Each (In a Pack of 10)
MYR8.751
Temporarily out of stock
Siemens, SENTRON MCCB 2P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-205
  • Mfr. Part No. 3VA5220-6EC61-0AA0
Each
MYR6,960.41
Temporarily out of stock
Eaton RCCB, 40A, 2 Pole, 300mA, Type S, 230V ac
  • RS Stock No. 227-0720
  • Mfr. Part No. 264285 PFGM-40/2/03-S
Each
MYR1,573.49
In Stock
Eaton 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1492
  • Mfr. Part No. S505-5-R
Each (In a Pack of 10)
MYR12.283
Temporarily out of stock
Eaton xEffect - FBSmV RCCB, 40A, 2 Pole, 300mA, Type S, 240/415V ac
  • RS Stock No. 121-137
  • Mfr. Part No. 170142 FBSMV-40/2/03-S
Each
MYR798.06
Temporarily out of stock
ETA Thermal Circuit Breaker - 106-P30 Single Pole 250V Voltage Rating Panel Mount, 5A Current Rating
  • RS Stock No. 335-968
  • Mfr. Part No. 106-P30-000040-5A
Each
MYR96.02
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 320A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 230-979
  • Mfr. Part No. 110302 NZMN3-A320-BT
Each
MYR12,221.55
In Stock
Eaton RCCB, 20A, 2 Pole, 30mA, Type B, 230V ac
  • RS Stock No. 922-8730
  • Mfr. Part No. 236239 PKNM-20/1N/B/003-A-MW
Each
MYR869.02
In Stock
Eaton Fuse Holder Trip Indicator Kit
  • RS Stock No. 182-1510
  • Mfr. Part No. MC-250
Each
MYR145.89
In Stock
ETA Thermal Magnetic Circuit Breaker - 201 Single Pole, 5A Current Rating
  • RS Stock No. 333-265
  • Mfr. Part No. 201-5A
Each
MYR209.77
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 32A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4225
  • Mfr. Part No. 3VA1132-4EF36-0AA0
Each
MYR1,493.82
1
317
2329
Results per page

Related links