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
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

96 / 999+
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 16A Current Rating
  • RS Stock No. 210-2068
  • Mfr. Part No. 3120-N521-H7T1-W01D-16A
Each
MYR169.89
Better World
ABB System Pro M Compact S200 MCB, 2P, 2A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7848
  • Mfr. Part No. 2CDS252001R0021 S202-D2
Each
MYR335.17
Eaton 30A F Cartridge Fuse, 10 x 22mm
  • RS Stock No. 848-4046
  • Mfr. Part No. JJN-30
Each
MYR287.57
Littelfuse 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4533
  • Mfr. Part No. 0218010.MXP
Each (In a Pack of 10)
MYR6.457
ABB Tmax XT Changeover Contact for use with Circuit Breaker
  • RS Stock No. 232-0183
  • Mfr. Part No. 1SDA066431R1 AUX-C 1Q+1SY 250V XT1..XT4
Each
MYR295.90
Phoenix Contact Busbar
  • RS Stock No. 332-5829
  • Mfr. Part No. 2966692
Each
MYR71.68
Schneider Electric Acti9 A9F0 MCB, 1P, 13A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 212-213
  • Mfr. Part No. A9F07113
Each
MYR237.88
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 30A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-579
  • Mfr. Part No. 3VA5130-5ED21-1AA0
Each
MYR1,868.98
ETI 25A D02 Neozed Fuse, E18 Thread Size, gG, 400V ac
  • RS Stock No. 415-991
  • Mfr. Part No. 2212002
Each (In a Pack of 5)
MYR5.916
Littelfuse 0.3A Resettable Fuse, 72V
  • RS Stock No. 517-6613
  • Mfr. Part No. RXEF030
Each (In a Pack of 10)
MYR1.274
Littelfuse PC Board Non Resettable Fuse, Radial 31mA, 125V ac/dc
  • RS Stock No. 878-1413
  • Mfr. Part No. 0273.031V
Each (In a Pack of 5)
MYR178.676
Phoenix Contact CLIPLINE Electronic Circuit breaker 24A 24V PTCB E1, 1 channels
  • RS Stock No. 220-5806
  • Mfr. Part No. 1135753
Each
MYR223.87
Better World
ABB Compact Home SH200 MCB, 3P, 16A Curve C, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 539-8352
  • Mfr. Part No. 2CDS213001R0164 SH203-C16
Each
MYR322.70
ABB System Pro M Compact S200M MCB, 3P, 10A Curve C, 440V AC, 12V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4267
  • Mfr. Part No. 2CDS273001R0104 S203M-C10
Each
MYR493.11
RS PRO 4A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 247-3961
Each (In a Pack of 10)
MYR4.00
Littelfuse 3A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0082
  • Mfr. Part No. 0313003.HXP
Each (In a Pack of 10)
MYR4.442
Mersen 5A T Fibreglass Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4339
  • Mfr. Part No. ATDR5
Each
MYR113.41
RS PRO 32A Solid Link for A2 Fuses
  • RS Stock No. 242-1055
Each (In a Pack of 5)
MYR15.638
Better World
Siemens RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6196
  • Mfr. Part No. 5SU1326-7FP10
Each
MYR1,202.57
Eaton 3A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8213
  • Mfr. Part No. PV-3A10F
Each
MYR59.62
1
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