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

47266 Products showing for Fuses & Circuit Breakers

2359 of 999+
Lovato ModuLo P1MB MCB, 1P, 40A Curve D, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5652
  • Mfr. Part No. P1MB1PD40
Each
HK$154.93
Sato Parts 10A Rail Mount Fuse Holder for 6.3 x 32 mm, 6.35 x 30 x 6.35 x 31.8 mm Fuse, 1P, 250V
  • RS Stock No. 229-4967
  • Mfr. Part No. F-700-B
Each
HK$25.84
6A NH Fuse, 1.75 x 0.75 x 1.88in, 600V ac
  • RS Stock No. 261-936
  • Mfr. Part No. TCF6RN
Each
HK$748.70
Lovato MCB, 1P, 3A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 188-1632
  • Mfr. Part No. P1MBUH1PC03
Each
HK$494.41
Siemens SENTRON 1 Phase Busbar, 230V
  • RS Stock No. 187-5190
  • Mfr. Part No. 5ST3687-0
Each
HK$115.50
3.15A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 263-454
  • Mfr. Part No. 36TDQSJ3.15
Each
HK$2,688.50
Eaton Cartridge Fuse, 12.13 x 0.64mm
  • RS Stock No. 261-902
  • Mfr. Part No. FP-4
Each
HK$3,110.20
Eaton 400A Fuse Holder for 190 x 103 x 715mm Fuse, 3P, 690V ac
  • RS Stock No. 261-322
  • Mfr. Part No. EBF2330W1
Each
HK$2,358.90
Eaton 100A 0.001 x 0.001in Modular Fuse Fuse Block, 700V
  • RS Stock No. 260-719
  • Mfr. Part No. BH-0112
Each
HK$2,502.10
ABB S800U MCB, 1P, 30A Curve K, 240V AC, 30 kA Breaking Capacity
  • RS Stock No. 140-446
  • Mfr. Part No. 2CCS881017R0527
Each
HK$2,160.53
Eaton 630A Fuse Holder for 239 x 137.5 x 220mm Fuse, 3P, 690V ac
  • RS Stock No. 261-672
  • Mfr. Part No. TD3-D NH3 Triple Pole Base CE
Each
HK$1,328.80
Lovato 1 Phase Surge Protector, 15kA
  • RS Stock No. 216-8308
  • Mfr. Part No. SG2C1NA320
Each
HK$1,216.73
250A Tag Fuse, 185 x 270mm, 690V
  • RS Stock No. 262-636
  • Mfr. Part No. EBH1O3TVS
Each
HK$1,998.40
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9874
  • Mfr. Part No. 3VA1125-6GF42-0AA0
Each
HK$5,157.10
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 252-247
  • Mfr. Part No. 192365 NZMN3-PX630-BT
Each
HK$38,954.50
Eaton xEffect MCB, 3P, 250mA Curve C
  • RS Stock No. 230-0931
  • Mfr. Part No. 177590 FAZ6-C0,25/3
Each
HK$1,059.46
Contactum 16 Way Steel Consumer Unit, 100A Defender
  • RS Stock No. 184-9108
  • Mfr. Part No. DD161MS
Each
HK$910.41
Eaton xEffect MCB, 3P, 1A Curve B
  • RS Stock No. 230-0870
  • Mfr. Part No. 177577 FAZ6-B1/3
Each
HK$940.24
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 250-701
  • Mfr. Part No. 192363 NZMN3-PX250-BT
Each
HK$34,532.80
Eaton NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 251-127
  • Mfr. Part No. 192356 NZMN3-PX630
Each
HK$36,801.30
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