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

144 of 999+
ABB S804S MCB, 4P, 10A, UC-K, 1000V DC, 50 kA Breaking Capacity
  • RS Stock No. 140-286
  • Mfr. Part No. 2CCS864001R1427
Each
HK$10,193.40
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 25A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-315
  • Mfr. Part No. 3VA5125-5ED11-1AA0
Each
HK$1,243.30
Eaton MCB, 1P, 13A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 240-535
  • Mfr. Part No. 101271 PLI-B13/1N
Each
HK$471.55
Eaton 15A Inline Fuse Holder for 6.3 x 32mm Fuse, 32V dc
  • RS Stock No. 849-5778
  • Mfr. Part No. HRK-R
Each
HK$66.00
HENSEL ENYSTAR Distribution Board
  • RS Stock No. 117-148
  • Mfr. Part No. DP 9026
Each
HK$116.02
Schneider Electric, ComPacT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 260-7866
  • Mfr. Part No. C25B3TM250
Each
HK$14,198.69
Legrand 2A Ceramic Cartridge Fuse, 8 x 32mm
  • RS Stock No. 266-3087
  • Mfr. Part No. 0 124 02
1 Box of 10
HK$368.79
Eaton 63A Rail Mount Fuse Holder for A1 Fuse, 1P, 1.2 kV ac, 750V dc
  • RS Stock No. 182-1775
  • Mfr. Part No. RSL63H
Each
HK$3,500.60
Schneider Electric Altivar Process Modular Busbar, 380 → 480V
  • RS Stock No. 578-334
  • Mfr. Part No. VW3A98ABMDCE
Each
HK$2,091.20
Hager CFH RCCB, 63A, 3P+N Pole, 300mA, Type A-HI, 230 → 400V ac
  • RS Stock No. 597-935
  • Mfr. Part No. CFH863F
Each
HK$5,210.10
Eaton 25-30A Cartridge Fuse, 0.001 x 0.001in
  • RS Stock No. 228-656
  • Mfr. Part No. BG3032S
1 Pack of 8
HK$2,879.00
Schneider Electric Thermal Circuit Breaker - GB2 1P + N Pole 250V ac Voltage Rating DIN Rail Mount, 10A Current Rating
  • RS Stock No. 610-0910
  • Mfr. Part No. GB2CD16
Each
HK$301.30
Better World
Siemens RCBO, 10A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6219
  • Mfr. Part No. 5SU1346-7FP10
Each
HK$3,113.70
Eaton 2A Grey Blade Car Fuse, 32V ac/dc
  • RS Stock No. 852-7317
  • Mfr. Part No. ATM-2
Each
HK$16.80
Schneider Electric, Powerpact4 MCCB 1P 63A, Breaking Capacity 25 kA, Panel Mount
  • RS Stock No. 517-4819
  • Mfr. Part No. MGP0631L1
Each
HK$1,537.39
RS PRO 30A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V dc
  • RS Stock No. 284-6488
Each (In a Pack of 5)
HK$34.24
Schneider Electric Trunking Unit, KTA25 Series
  • RS Stock No. 244-995
  • Mfr. Part No. KTA2500ER51
Each
HK$20,600.64
Siemens SIRIUS Undervoltage Release for use with Motor Circuit Breaker
  • RS Stock No. 157-845
  • Mfr. Part No. 3RV1912-1CP0
Each
HK$388.70
RS PRO 3.15A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-699
Each (In a Pack of 10)
HK$4.97
Littelfuse SMD Non Resettable Fuse 3.15A, 125V
  • RS Stock No. 738-2902
  • Mfr. Part No. 04513.15MRL
Each (In a Pack of 10)
HK$8.92
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