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

201 / 999+
Mersen 2A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-7022
  • Mfr. Part No. H218714
Each (In a Pack of 10)
MYR7.104
ABB DS201 RCCB, 40A, 2 Pole, 30mA, Type C, 240V
  • RS Stock No. 289-1626
  • Mfr. Part No. 2CSR255480R1404
Each
MYR1,032.63
Eaton RCD, 16A, 2 Pole, 10mA, Type AC
  • RS Stock No. 922-8591
  • Mfr. Part No. 235389 PFIM-16/2/001-MW
Each
MYR599.48
Better World
Siemens 5sV3 RCCB, 63A, 2 Pole, 30mA, Type F, 230V ac
  • RS Stock No. 211-9632
  • Mfr. Part No. 5SV3316-3
Each
MYR3,602.75
Mersen 32A Rail Mount Fuse Holder, N, 690 V ac → 1kV ac/dc
  • RS Stock No. 189-5341
  • Mfr. Part No. H1062722 / CUS10N
Each
MYR58.05
ABB Electronic Time Delay for use with E1, E1.2, E2, E2.2, E3, E4, E4.2, E6, E6.2, T7, T8, X1, XT7-XT7M
  • RS Stock No. 250-4512
  • Mfr. Part No. 1SDA038316R1
Each
MYR2,032.63
Littelfuse PC Board Non Resettable Fuse, Axial 1A, 125V ac/dc
  • RS Stock No. 878-3703
  • Mfr. Part No. 0473001.MRT1L
Each (In a Pack of 50)
MYR6.722
Schneider Electric MasterPacT Locking Kit for use with MasterPact NW
  • RS Stock No. 432-740
  • Mfr. Part No. 64930
Each
MYR2,783.47
Siemens SIVACON S4 Busbar, 80mm Pitch
  • RS Stock No. 626-481
  • Mfr. Part No. 8PQ4000-0BA31
Each
MYR1,655.14
Littelfuse 20A Inline Fuse Holder for 6.3 x 32mm Fuse, 32V dc
  • RS Stock No. 360-7294
  • Mfr. Part No. 01550100Z
Each (In a Pack of 5)
MYR12.71
Schurter 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 384-106
  • Mfr. Part No. 3101.0055
Each (In a Pack of 5)
MYR15.248
Schneider Electric RCBO, 32A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type AC, Acti9 Range
  • RS Stock No. 276-8720
  • Mfr. Part No. A9D57432
Each
MYR4,016.15
RS PRO MCB, 1P, 6A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0193
Each
MYR44.06
ABB Tmax XT Auxiliary Contact for use with Tamx XT
  • RS Stock No. 236-6882
  • Mfr. Part No. 1SDA104815R1 AUP-I XT5-6 P/W 3 250V
Each
MYR633.83
Better World
Schneider Electric Multi 9 MCB, 2P, 10A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9126
  • Mfr. Part No. M9F22210
Each
MYR949.25
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4240
  • Mfr. Part No. 3VA1125-3ED36-0AA0
Each
MYR1,972.14
Eaton 63A Fuse Holder for 50 x 27mm Fuse, 1P, 500V
  • RS Stock No. 261-378
  • Mfr. Part No. SFRD33 SICHERUNGSUNTERTEIL D3 E33 1POL DIN HUT
1 Pack of 15
MYR1,626.62
Schneider Electric, ComPacT NSX Circuit breaker 1P 80A, Breaking Capacity 25 KA
  • RS Stock No. 119-474
  • Mfr. Part No. C10N1TM080
Each
MYR1,398.26
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 25 kA
  • RS Stock No. 210-1642
  • Mfr. Part No. 3VA1125-3EE32-0AA0
Each
MYR1,739.51
SIBA 80A White Automotive Car Fuse, 80V dc
  • RS Stock No. 161-1830
  • Mfr. Part No. 9005805.80
Each
MYR26.18
1
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