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

149 of 999+
Temporarily out of stock
Lovato MCB, 3P, 16A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 188-1659
  • Mfr. Part No. P1MBUH3PC16
Each
HK$1,516.28
In Stock
Schneider Electric RCBO, 32A Current Rating, 1P Poles, Type B, Acti9 Range
  • RS Stock No. 245-144
  • Mfr. Part No. A9D56832
Each
HK$1,741.90
In Stock
Siemens 25A Diazed Fuse, gG, 500/440V ac/dc
  • RS Stock No. 163-282
  • Mfr. Part No. 5SB2811
1 Pack of 25
HK$128.60
In Stock
Bourns Surface Mount Fuse 8A, 50 V dc, 63 V dc
  • RS Stock No. 245-9214
  • Mfr. Part No. SF-0603SPA800R-2
Each
HK$5.00
Temporarily out of stock
Schneider Electric Acti9 4 Phase Extension Box, 160 A
  • RS Stock No. 339-835
  • Mfr. Part No. SEA9PNI1604
Each
HK$9,052.40
In Stock
Phoenix Contact Thermal Circuit Breaker - TCP 0.25A Single Pole 65 V dc, 250V ac Voltage Rating, 250mA Current Rating
  • RS Stock No. 170-3784
  • Mfr. Part No. 0712123
Each (In a Box of 20)
HK$130.175
In Stock
Schurter SMD Non Resettable Fuse 4A, 32 V ac, 63V dc
  • RS Stock No. 665-7400
  • Mfr. Part No. 3413.0222.22
Each (In a Pack of 10)
HK$2.89
Temporarily out of stock
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-832
  • Mfr. Part No. 3VA5225-5EF41-0AA0
Each
HK$18,029.20
Temporarily out of stock
Siemens, SENTRON MCCB 4P 110A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-939
  • Mfr. Part No. 3VA5211-7ED41-2AA0
Each
HK$19,065.40
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 100mA, 250V ac
  • RS Stock No. 895-1653
  • Mfr. Part No. 37201000411
Each (In a Pack of 10)
HK$6.74
Temporarily out of stock
RS PRO SMD Non-Resettable Surface Mount Fuse 8A, 125V
  • RS Stock No. 252-2213
Each (In a Pack of 50)
HK$2.156
Temporarily out of stock
Schurter 12A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 173-7910
  • Mfr. Part No. 8020.0603.G
1 Box of 1000
HK$5,345.80
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 1P, 1A, Type Z, 230/400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-714
  • Mfr. Part No. 2CDS251001R0218
Each
HK$744.34
Temporarily out of stock
Better World
ABB, XT2H MCCB 4P 63A, Fixed Mount
  • RS Stock No. 236-7559
  • Mfr. Part No. 1SDA067910R1 XT2H 160 Ekip LSIG 63A FF
Each
HK$15,255.94
Temporarily out of stock
Better World
Siemens SENTRON Wire Connector for use with 3VA52 250
  • RS Stock No. 269-7133
  • Mfr. Part No. 3VA9233-0JB11
Each (In a Pack of 3)
HK$91.467
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3P, 8A Curve D, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 203-887
  • Mfr. Part No. 2CDS273001R0081
Each
HK$3,355.58
In Stock
SIBA 500mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3214
  • Mfr. Part No. 70-007-33/0.5A
Each (In a Pack of 10)
HK$7.69
Temporarily out of stock
SENTRON Nut Keeper Kit for use with 3VA61/62 Series
  • RS Stock No. 263-805
  • Mfr. Part No. 3VA9244-0QA00
1 Kit
HK$295.60
Temporarily out of stock
SENTRON Door Feedthrough Accessory for use with 3VA61/62 Series
  • RS Stock No. 263-969
  • Mfr. Part No. 3VA9147-0KT00
Each
HK$505.40
Temporarily out of stock
Siemens SENTRON Auxiliary Switch Kit for use with 3VA5 125
  • RS Stock No. 272-0201
  • Mfr. Part No. 3VA9137-0GX10
Each
HK$451.50
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