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

47265 Products showing for Fuses & Circuit Breakers

2361 of 999+
Temporarily out of stock
Eaton 100A Cartridge Fuse, 76 x 442mm
  • RS Stock No. 253-700
  • Mfr. Part No. 24TFMEJ100
Each
HK$6,211.50
Temporarily out of stock
Eaton 630A Fuse Holder for 675 x 110 x 195mm Fuse, 3P, 690V ac
  • RS Stock No. 261-895
  • Mfr. Part No. EBV333TM2
Each
HK$3,275.70
Temporarily out of stock
Eaton RCCB, 40A, 2 Pole, 100mA, Type S, 230V ac
  • RS Stock No. 227-0717
  • Mfr. Part No. 264284 PFGM-40/2/01-S
Each
HK$2,444.65
In Stock
Eaton Electronic Circuit Breaker 6A 24V , 1 channels , DIN Rail
  • RS Stock No. 261-360
  • Mfr. Part No. PXS24E06A002 PXS24E-e6/F
Each
HK$372.80
Temporarily out of stock
Eaton 16A Cartridge Fuse, 50 x 442mm
  • RS Stock No. 254-882
  • Mfr. Part No. 24TDMEJ16
Each
HK$1,761.50
In Stock
Phoenix Contact 2 Phase Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 201-6257
  • Mfr. Part No. 2906820
Each
HK$1,003.30
Temporarily out of stock
Eaton 160A Cartridge Fuse, 88 x 442mm
  • RS Stock No. 254-756
  • Mfr. Part No. 24TXMEJ160
Each
HK$8,508.60
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 50A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 178-7996
  • Mfr. Part No. LV426796
Each
HK$11,733.93
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 63A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 255-582
  • Mfr. Part No. 265744 NZMH2-S63
Each
HK$4,562.00
In Stock
Bourns 80A Tag Fuse, 38mm, 170V dc, 24.1mm
  • RS Stock No. 254-4227
  • Mfr. Part No. PF-NT2-80
Each
HK$209.90
Temporarily out of stock
Eaton PXS24-BBC Busbar Cover for use with PXS24 Series
  • RS Stock No. 261-667
  • Mfr. Part No. PXS24ACC0002 PXS24-BBC
Each
HK$59.70
Temporarily out of stock
Eaton Electronic Circuit Breaker 24V , DIN Rail
  • RS Stock No. 261-399
  • Mfr. Part No. PXS24ACC0000 PXS24-PCH
Each
HK$59.00
In Stock
Eaton xEffect MCB, 3+N, 5A Curve C
  • RS Stock No. 230-0980
  • Mfr. Part No. 177465 FAZ6-C5/3N
Each
HK$988.71
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 40A, Fixed Mount
  • RS Stock No. 260-7632
  • Mfr. Part No. C11H4TM040B
Each
HK$7,423.35
Temporarily out of stock
Eaton 450A Tag Fuse, 660V ac, 133/184mm
  • RS Stock No. 261-424
  • Mfr. Part No. TM400M450
Each
HK$2,379.50
Temporarily out of stock
Eaton xEnergy Safety Ci Distribution Board Enclosure, 1 Way, 630 A
  • RS Stock No. 251-880
  • Mfr. Part No. 194574 CI44-S60-630/3-1XNH00
Each
HK$5,060.30
Currently unavailable
Altech Thermal Circuit Breaker - V-EA 2 Pole 277V Voltage Rating DIN Rail Mount, 0.3A Current Rating
  • RS Stock No. 899-1847
  • Mfr. Part No. 2G03UM
Each
HK$295.90
Temporarily out of stock
Eaton RCCB, 63A, 2 Pole, 500mA, Type A, 230V ac
  • RS Stock No. 227-0744
  • Mfr. Part No. 267452 PFGM-63/2/05-A
Each
HK$3,375.47
Temporarily out of stock
Eaton 400A Fuse Holder for 254 x 196 x 115mm Fuse, 3P, 690V ac
  • RS Stock No. 258-703
  • Mfr. Part No. 289017 GSU2
Each
HK$1,945.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9680
  • Mfr. Part No. 3VA11106ED460AA0
Each
HK$5,321.10
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