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

90 / 999+
RS PRO HBC, LBC Fuse Kit
  • RS Stock No. 420-252
1 Kit
MYR503.45
Eaton 8A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7250
  • Mfr. Part No. AGC-8-R
Each
MYR13.45
SIBA 3.15A F Glass Cartridge Fuse, 5 x 30mm
  • RS Stock No. 361-8193
  • Mfr. Part No. 171530.3,15
Each (In a Pack of 10)
MYR11.059
ABB E211 RCCB, 25A, 2 Pole, 400V
  • RS Stock No. 289-1602
  • Mfr. Part No. 2CCA703006R0001
Each
MYR112.24
Eaton xEffect MCB, 3P, 4A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 624-0383
  • Mfr. Part No. 278865 FAZ-C4/3
Each
MYR692.92
Eaton 50mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9446
  • Mfr. Part No. S506-50-R
1 Bag of 1000
MYR2,296.80
Eaton 160A NH Fuse, NH0, 500V ac
  • RS Stock No. 181-8809
  • Mfr. Part No. 160NHG0B
Each
MYR48.93
Better World
ABB Compact Home SH200 MCB, 1P, 32A Curve C, 440V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 539-8251
  • Mfr. Part No. 2CDS211001R0324 SH201-C32
Each
MYR83.66
RS PRO 8A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 611-9122
Each (In a Pack of 10)
MYR5.651
Schneider Electric Nsx100...250, Nsx400...630 LCD display for use with Micrologic 5 Trip Unit
  • RS Stock No. 221-1213
  • Mfr. Part No. LV429483
Each
MYR1,278.38
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 32A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8619
  • Mfr. Part No. EZ9F16132
Each
MYR28.08
Eaton xEffect MCB, 2P, 6A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4835
  • Mfr. Part No. 168070 FAZ6-D6/2
Each
MYR378.44
Altech 6A T Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 900-1550
  • Mfr. Part No. 6C10X38GI
Each (In a Pack of 10)
MYR10.385
ABB System Pro M Compact S200M MCB, 3+N, 4A Curve C, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 204-398
  • Mfr. Part No. 2CDS273103R0044
Each
MYR2,607.24
Littelfuse 3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 787-4246
  • Mfr. Part No. 0239003.MXP
Each (In a Pack of 10)
MYR3.404
Better World
Schneider Electric Acti 9 C60H-DC MCB, 2P, 6A Curve C, 500V DC
  • RS Stock No. 772-1515
  • Mfr. Part No. A9N61526
Each
MYR696.57
ABB System Pro M Compact S300P MCB, 4P, 32A Curve K, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 200-107
  • Mfr. Part No. 2CDS384001R0537
Each
MYR2,830.10
RS PRO 1A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-419
Each (In a Pack of 10)
MYR1.457
Legrand 1A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 180-6104
  • Mfr. Part No. 0 102 10
Each (In a Box of 10)
MYR8.786
Better World
Siemens Sentron 5SY4 MCB, 4P, 32A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3202
  • Mfr. Part No. 5SY4432-7
Each
MYR1,008.61
1
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