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

176 / 999+
RS PRO Thermal Circuit Breaker - Single Pole 250V ac Voltage Rating Plug In, 500mA Current Rating
  • RS Stock No. 262-4259
1 Box of 2
MYR268.74
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
Hager RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 602-219
  • Mfr. Part No. ADC823F
Each
MYR1,120.40
SENTRON Motor Operator for use with 3VA53/54, 3VA63/64 Series
  • RS Stock No. 263-946
  • Mfr. Part No. 3VA9447-0HC20
Each
MYR9,125.42
ABB DS201 RCCB, 40A, 2 Pole, 30mA, Type C, 240V
  • RS Stock No. 289-1626
  • Mfr. Part No. 2CSR255480R1404
Each
MYR1,032.63
RS PRO Single Phase Industrial Surge Protector, 50kA, 1.5kV, DIN Rail Mount
  • RS Stock No. 101-739
Each
MYR527.27
Littelfuse 200A Grey, White Fuse Strips Car Fuse, 80V dc
  • RS Stock No. 226-0901
  • Mfr. Part No. 157.5701.6201
Each
MYR39.84
Allen Bradley MCB, 3P, 2A Curve D, 240V AC
  • RS Stock No. 254-6245
  • Mfr. Part No. 1489-M3D020
Each
MYR803.24
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 70 kA
  • RS Stock No. 209-7002
  • Mfr. Part No. 3VA1150-6EE36-0AA0
Each
MYR1,602.89
Better World
Schneider Electric, PowerLogic, 63A, Energy Sensor, 2VA, Wired
  • RS Stock No. 256-4048
  • Mfr. Part No. A9MEM1571
Each
MYR1,910.70
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-773
  • Mfr. Part No. 3VA5210-5EC41-0AA0
Each
MYR6,340.04
Better World
Siemens Sentron 5SY7 MCB, 3P, 20A Curve B, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 622-0402
  • Mfr. Part No. 5SY7320-6
Each
MYR645.22
SENTRON Wire Connector for use with 3VA61/62 Series
  • RS Stock No. 263-921
  • Mfr. Part No. 3VA9243-0JJ22
1 Kit
MYR706.13
Eaton 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1329
  • Mfr. Part No. S506-4-R
Each (In a Pack of 10)
MYR1.793
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3728
  • Mfr. Part No. 3VA1125-5ED32-0AA0
Each
MYR1,811.69
Hager NRN MCB, 3P, 6A Curve C, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 597-944
  • Mfr. Part No. NRN306
Each
MYR1,322.30
Phoenix Contact Non Resettable Fuse 250mA, 250V
  • RS Stock No. 135-565
  • Mfr. Part No. 2903435
Each
MYR101.58
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-3536
  • Mfr. Part No. 1SDA071514R1
Each
MYR37,115.78
Hager Hager NKN Circuit Breaker, 2P, 63A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-798
  • Mfr. Part No. NKN263
Each
MYR1,097.77
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7244
  • Mfr. Part No. 1SDA067308R1 Ekip LSI In=100A XT2 3p
Each
MYR5,230.80
1
176
2329
Results per page

Related links