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

46578 Products showing for Fuses & Circuit Breakers

203 / 999+
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 16A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3164
  • Mfr. Part No. A9F53116
Each
MYR165.23
Better World
ABB, XT4H MCCB 4P 250A, Fixed Mount
  • RS Stock No. 236-6799
  • Mfr. Part No. 1SDA068540R1 XT4H 250 Ekip I 250A FF
Each
MYR7,532.76
Better World
ABB System Pro M Compact S200 MCB, 1+N, 40A, Type Z
  • RS Stock No. 237-3219
  • Mfr. Part No. 2CDS251103R0558
Each
MYR475.58
Schneider Electric Acti 9 MCB, 1P, 16A Curve C, 230V AC, 7.5 kA Breaking Capacity
  • RS Stock No. 200-6149
  • Mfr. Part No. A9PE4616
Each
MYR608.74
Siemens, SENTRON MCCB 3P 1kA, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4795
  • Mfr. Part No. 3VA2510-7HN32-0AA0
Each
MYR34,062.74
Eaton xEffect - FRCmM RCCB, 40A, 4 Pole, 300mA, 240/415V ac
  • RS Stock No. 123-621
  • Mfr. Part No. 170448 FRCMM-40/4/03-S/A
Each
MYR1,576.89
Eaton 160A Rail Mount Fuse Holder for 00 Fuse, 1P, 690V ac
  • RS Stock No. 765-2942
  • Mfr. Part No. SD00-D
Each
MYR55.94
Littelfuse 125mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4280
  • Mfr. Part No. 0217.125MXP
Each (In a Pack of 10)
MYR4.715
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 20A Current Rating
  • RS Stock No. 210-2072
  • Mfr. Part No. 3120-N521-H7T1-W01D-20A-U0000M
Each
MYR325.24
Legrand DX3 RCCB, 40A, 3+N Pole, 300mA, Type AC
  • RS Stock No. 732-0086
  • Mfr. Part No. 4 116 65
Each
MYR1,076.28
Better World
Schneider Electric Circuit Trip
  • RS Stock No. 219-9356
  • Mfr. Part No. LV429405
Each
MYR1,144.27
TE Connectivity Thermal Circuit Breaker - W28 Single Pole 32 V dc, 250V ac Voltage Rating, 500mA Current Rating
  • RS Stock No. 782-7956
  • Mfr. Part No. W28-XQ1A-0.50
Each
MYR37.04
ABB F404 RCCB, 63A, 3+N Pole, 30mA, Type A
  • RS Stock No. 176-891
  • Mfr. Part No. 2CCF544110E0630 - F404A-63/0.03, 2CC
Each
MYR1,689.14
Schneider Electric 480V ac Undervoltage Release Circuit Trip for use with ComPacT
  • RS Stock No. 339-774
  • Mfr. Part No. 33673
Each
MYR3,776.05
Eaton xPole PXL, S200 MCB, 1P, 16A Curve B, 400V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 486-883
  • Mfr. Part No. 236033 PXL-B16/1
Each
MYR19.58
ABB, Tmax XT MCCB 4P 0kA
  • RS Stock No. 237-6248
  • Mfr. Part No. 1SDA067126R1 RC Sel XT2 F
Each
MYR4,799.52
Legrand, DX3 MCCB 1P 25A, Breaking Capacity 4.5 kA, DIN Rail Mount
  • RS Stock No. 731-9544
  • Mfr. Part No. 4 067 76
Each
MYR206.38
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 35A, Breaking Capacity 35 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-370
  • Mfr. Part No. 3VA5135-5ED21-0AA0
Each
MYR1,780.75
Eaton xEffect MCB, 3P, 16A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4750
  • Mfr. Part No. 168081 FAZ6-D16/3
Each
MYR716.08
Better World
Siemens, SENTRON MCCB 4P 630A, Breaking Capacity 85 kA
  • RS Stock No. 209-7083
  • Mfr. Part No. 3VA2563-6HL42-0AA0
Each
MYR15,867.18
1
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