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

2317 / 999+
Schneider Electric Connection Unit for use with ComPact NS630b → 1600 Circuit Breaker, ComPact NS630b →
  • RS Stock No. 247-1866
  • Mfr. Part No. 33727
Each
MYR1,501.70
Better World
Siemens SENTRON 5SY4 MCB, 3+N, 3A Curve D
  • RS Stock No. 216-4057
  • Mfr. Part No. 5SY4603-8
Each
MYR979.82
Eaton RCCB, 25A, 4 Pole, 500mA, Type A, 230 V ac, 400 V ac
  • RS Stock No. 227-0709
  • Mfr. Part No. 267456 PFGM-25/4/05-A
Each
MYR1,615.38
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9318
  • Mfr. Part No. 3VA1140-3GF42-0AA0
Each
MYR2,192.25
Eaton Surge Arrester, 25kA, On Base Element Mount
  • RS Stock No. 250-9825
  • Mfr. Part No. 195237 SPRT12-350
Each
MYR2,174.52
Mersen 200A Bolted Tag Fuse, A4XC, 240 V dc, 415V ac, 94mm
  • RS Stock No. 178-1049
  • Mfr. Part No. F226302 / BTFP42V200
Each (In a Pack of 5)
MYR201.00
Bourns 1.85A Resettable Fuse, 24V
  • RS Stock No. 245-9144P
  • Mfr. Part No. MF-LSMF185/24X-2
Each (Supplied on a Reel)
MYR3.459
ABB Emax2 Electronic Circuit Breaker 2kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-4733
  • Mfr. Part No. 1SDA073010R1
Each
MYR74,434.05
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 500mA Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5985
  • Mfr. Part No. 5SL4505-7
Each
MYR388.22
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9576
  • Mfr. Part No. 3VA10253ED460KD0
Each
MYR3,678.67
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LI, 4 channels
  • RS Stock No. 259-3594
  • Mfr. Part No. 1SDA071571R1
Each
MYR40,701.81
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-3622
  • Mfr. Part No. 1SDA071598R1
Each
MYR58,729.45
Better World
ABB, XT4H MCCB 3P 20A, Fixed Mount
  • RS Stock No. 236-6748
  • Mfr. Part No. 1SDA068443R1 XT4H 160 MA 20 FF
Each
MYR3,337.67
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4599
  • Mfr. Part No. 3VA2140-0HM46-0AA0
Each
MYR8,777.21
Siemens 230V ac Remote Switch Circuit Trip
  • RS Stock No. 223-7646
  • Mfr. Part No. 5TT4454-0
Each
MYR620.46
Legrand 12A M Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 266-3123
  • Mfr. Part No. 0 141 12
1 Box of 10
MYR635.00
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9875
  • Mfr. Part No. 3VA1125-6GF46-0AA0
Each
MYR2,389.56
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-3133
  • Mfr. Part No. 1SDA070984R1
Each
MYR27,784.99
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 4A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9637
  • Mfr. Part No. 3VA11046MG360AA0
Each
MYR2,439.12
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4313
  • Mfr. Part No. 3VA1150-4ED36-0AA0
Each
MYR1,811.69
1
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