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

86 / 999+
Schurter SMD Non Resettable Fuse 8A, 125V ac/dc
  • RS Stock No. 131-426
  • Mfr. Part No. 3404.0020.11
Each (In a Pack of 10)
MYR3.591
ABB System Pro M Compact S200 MCB, 3P, 4A, Type Z, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-264
  • Mfr. Part No. 2CDS253001R0338
Each
MYR1,756.66
Socomec 25A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 223-2796
  • Mfr. Part No. 60130025
Each (In a Pack of 10)
MYR6.628
Siemens Auxiliary Contact, 6 Contact, 2NC + 4NO, Side Mount, SENTRON
  • RS Stock No. 874-4534
  • Mfr. Part No. 3VA9988-0AA11
Each
MYR356.95
Schneider Electric 30A Fuse Holder, 1P, 600V ac
  • RS Stock No. 212-037
  • Mfr. Part No. DFCC1
1 Pack of 12
MYR1,709.67
Eaton BB-EV 2 Phase Busbar, 690V, 17.8mm Pitch
  • RS Stock No. 241-342
  • Mfr. Part No. 168865 BB-EVP-16/2P-1MU
Each
MYR261.34
Mersen 4A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2737
  • Mfr. Part No. E217170
1 Box of 10
MYR210.43
6.3A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 262-746
  • Mfr. Part No. 36TDQSJ6.3
Each
MYR1,384.25
6.3A Cartridge Fuses
  • RS Stock No. 263-451
  • Mfr. Part No. 36ADIHA6.3 36KV 6.3A 2" AIR FUSE
1 Pack of 3
MYR7,007.90
Eaton 16A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 261-574
  • Mfr. Part No. 36TDQSJ16 36KV 16A 2" DIN Resin Seal Fuse
Each
MYR1,524.38
SIBA 20A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-4194
  • Mfr. Part No. 50-124-06/20A
Each
MYR74.63
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 690 V ac → 1kV ac/dc
  • RS Stock No. 189-5340
  • Mfr. Part No. A1062715 / CUS103
Each
MYR166.63
Eaton 800mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 161-7617
  • Mfr. Part No. S506-800-R
1 Bag of 1000
MYR727.07
RS PRO 9A Resettable Fuse, 30V dc
  • RS Stock No. 279-6757
Each (In a Pack of 10)
MYR4.34
Eaton RCCB, 10A, 2 Pole, 10mA, Type AC, 230V ac
  • RS Stock No. 227-0688
  • Mfr. Part No. 264265 PFGM-16/2/001
Each
MYR887.53
Better World
Siemens Sentron 5SY4 MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 622-0036
  • Mfr. Part No. 5SY4104-7
Each
MYR169.66
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 3 kA, Plug In
  • RS Stock No. 249-023
  • Mfr. Part No. 192064 NZMN2-4-PX100/VAR-SVE
Each
MYR11,987.98
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 20A Current Rating
  • RS Stock No. 221-5636
  • Mfr. Part No. 3-128-240
1 Box of 10
MYR760.80
Eaton Electronic Circuit breaker
  • RS Stock No. 774-0162
  • Mfr. Part No. 121725 PKE-XTU-12
Each
MYR912.12
Eaton 2A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 848-2766
  • Mfr. Part No. AGC-2-R
Each
MYR10.20
1
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