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

46604 Products showing for Fuses & Circuit Breakers

11 / 999+
Better World
ABB, XT4L MCCB 4P 250A, Fixed Mount
  • RS Stock No. 236-6840
  • Mfr. Part No. 1SDA068590R1 XT4L 250 Ekip LSIG 250A FF
Each
MYR19,754.08
Littelfuse 800mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3732
  • Mfr. Part No. 0218.800MXP
Each (In a Pack of 10)
MYR3.314
Schurter PC Board Non Resettable Fuse, Radial 100mA, 250V ac
  • RS Stock No. 284-5221
  • Mfr. Part No. 0034.6605
Each (In a Pack of 10)
MYR3.086
ABB F200 RCCB, 100A, 4 Pole, 30mA, Type AC
  • RS Stock No. 538-3855
  • Mfr. Part No. 2CSF204001R1900 F204 AC-100/0,03
Each
MYR1,362.70
Better World
Siemens Sentron 5SY4 MCB, 1P, 16A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2030
  • Mfr. Part No. 5SY4116-7
Each
MYR109.03
Schurter Thermal Circuit Breaker - TA45 2 Pole 60 V dc, 240V ac Voltage Rating Panel Mount, 16A Current Rating
  • RS Stock No. 868-9042
  • Mfr. Part No. 4430.0034
Each (In a Pack of 20)
MYR94.496
Schurter 12A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 703-2666
  • Mfr. Part No. 8020.0603.G
Each (In a Pack of 10)
MYR4.864
Schurter 200mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 777-7485
  • Mfr. Part No. 0034.3110
Each (In a Pack of 10)
MYR3.169
RS PRO 630mA T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 414-409
Each (In a Pack of 10)
MYR5.632
Better World
Siemens 5SV3 RCCB, 40A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 124-7721
  • Mfr. Part No. 5SV3344-6
Each
MYR832.77
ABB 32A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9956
  • Mfr. Part No. OFAF000H32 1SCA022627R0910
Each
MYR32.54
Better World
Siemens Sentron 5SY6 MCB, 1P, 500mA Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 521-4989
  • Mfr. Part No. 5SY6105-7
Each
MYR125.12
Phoenix Contact Mounting Base for use with CB Series
  • RS Stock No. 768-1139
  • Mfr. Part No. 2800929
Each
MYR78.62
Eaton 2A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-554
  • Mfr. Part No. TDC180-2A
Each (In a Pack of 10)
MYR2.76
RS PRO PC Board Non Resettable Fuse, Radial 5A, 250V ac
  • RS Stock No. 767-5064
Each (In a Pack of 10)
MYR1.801
ABB 125A Tag Fuse, 79 x 30 x 60mm, 500V
  • RS Stock No. 250-4398
  • Mfr. Part No. 1SCA022697R3070
1 Box of 3
MYR257.24
Siemens 63A NH Fuse, NH000, 500V ac
  • RS Stock No. 396-067
  • Mfr. Part No. 3NA3822
Each (In a Pack of 3)
MYR160.47
RS PRO 12A M Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 182-4004
Each (In a Pack of 5)
MYR41.90
TE Connectivity Thermal Circuit Breaker - W28 SP Pole 32 V dc, 250 V ac Voltage Rating Panel Mount, 15A Current Rating
  • RS Stock No. 167-5699
  • Mfr. Part No. W28-XQ1A-15
Each
MYR22.58
Better World
Siemens Sentron 5SY6 MCB, 2P, 6A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3628
  • Mfr. Part No. 5SY6206-7
Each
MYR353.89
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