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

195 / 999+
RS PRO 20A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 247-3983
Each (In a Pack of 10)
MYR5.853
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-4000
  • Mfr. Part No. 1SDA072060R1
Each
MYR36,063.67
Eaton 10A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9386
  • Mfr. Part No. S500-10-R
1 Bag of 1000
MYR955.44
Schneider Electric PowerPact H Lug Connector for use with Short lug
  • RS Stock No. 358-467
  • Mfr. Part No. S37447
Each
MYR1,115.04
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 3A Current Rating
  • RS Stock No. 221-5634
  • Mfr. Part No. 3-128-239
1 Box of 10
MYR1,031.28
Eaton Eaton Moeller Series NZM Phase Isolator for use with N(S)2-4, NZM2-4, PN2-4
  • RS Stock No. 230-424
  • Mfr. Part No. 119865 NZM2-4-XKP
Each
MYR144.49
Allen Bradley 140MT Auxiliary Contact for use with Motor Protection Circuit Breaker
  • RS Stock No. 273-2274
  • Mfr. Part No. 140MT-C-AFAR01A10
Each
MYR90.26
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 20A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9153
  • Mfr. Part No. A9F77320
Each
MYR974.50
ABB F200 RCCB, 16A, 2 Pole, 10mA, Type AC, 230V ac
  • RS Stock No. 231-9897
  • Mfr. Part No. 2CSF202001R0160 F202 AC-16/0.01
Each
MYR978.03
Eaton 110 V dc, 250V ac Auxiliary Release Shunt trip for use with FAZ Series MCB/RCBO
  • RS Stock No. 922-6958
  • Mfr. Part No. 262414 FAZ-XAM002
Each
MYR265.81
SIBA 63A NH Fuse, NH00, 690V
  • RS Stock No. 893-8552
  • Mfr. Part No. 20-209-08/63A
Each (In a Pack of 3)
MYR110.00
SIBA 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 736-1422
  • Mfr. Part No. 50-199-06/10A
Each
MYR82.81
ABB RCBO, 16A Current Rating, 1P+N Poles, 300mA Trip Sensitivity, Type C
  • RS Stock No. 183-3706
  • Mfr. Part No. 2CSR245041R3164
Each
MYR974.28
Eaton 32A Tag Fuse, 12 x 47mm, 240V
  • RS Stock No. 228-984
  • Mfr. Part No. STD32
1 Pack of 20
MYR906.95
ABB 63A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 251-3434
  • Mfr. Part No. 1SCA022627R1390
1 Box of 9
MYR253.17
SENTRON Terminal for use with 3VA51 Series
  • RS Stock No. 263-952
  • Mfr. Part No. 3VA9131-0QF20
Each
MYR171.10
Eaton xEffect MCB, 3P, 10A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3128
  • Mfr. Part No. 278843 FAZ-B10/3
Each
MYR609.10
Eaton xEffect MCB, 3+N, 6A Curve D
  • RS Stock No. 230-1057
  • Mfr. Part No. 177479 FAZ6-D6/3N
Each
MYR652.81
Better World
Schneider Electric Multi 9 C60BP MCB, 3P, 30A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2430
  • Mfr. Part No. M9F42330
Each
MYR1,586.39
Better World
Schneider Electric Busbar Tap-Off Unit, Canalis KBC Series
  • RS Stock No. 219-8874
  • Mfr. Part No. KBC10DCB20
Each (In a Pack of 10)
MYR65.301
1
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