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

46640 Products showing for Fuses & Circuit Breakers

2310 of 999+
Temporarily out of stock
ABB Circuit Breaker Accessory
  • RS Stock No. 231-9292
  • Mfr. Part No. 1SDA073687R1 YC E1.2..E6.2-XT7M 220-24
Each
HK$1,397.61
In Stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 125A, Breaking Capacity 4 kA, Plug In
  • RS Stock No. 229-855
  • Mfr. Part No. 113223 NZMC2-M125-SVE
Each
HK$8,789.16
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 70A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 269-719
  • Mfr. Part No. 3VA5270-5EC31-1AA0
Each
HK$7,508.50
In Stock
Better World
Schneider Electric iID RCCB, 63A, 4 Pole, 30mA, Type B-SI, 400V ac
  • RS Stock No. 248-3720
  • Mfr. Part No. A9Z61463
Each
HK$15,008.80
Temporarily out of stock
Siemens, SENTRON MCCB 3P 1A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-585
  • Mfr. Part No. 3VA5181-1MH31-0AA0
Each
HK$4,477.80
In Stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 32A
  • RS Stock No. 224-7845
  • Mfr. Part No. 3VA1132-5ED26-0AA0
Each
HK$2,947.80
Temporarily out of stock
Siemens SENTRON 5SJ4350 MCB, 3P, 50A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 300-084
  • Mfr. Part No. 5SJ4350-7HG41
Each
HK$3,893.60
Temporarily out of stock
Lovato ModuLo P1MB MCB, 3P, 63A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-5826
  • Mfr. Part No. P1MB3PB63
Each
HK$741.50
Temporarily out of stock
Better World
Schneider Electric, PowerPact MCCB Molded Case Circuit Breaker 3P 40A
  • RS Stock No. 221-1093
  • Mfr. Part No. NHDF36040TW
Each
HK$6,017.20
In Stock
Littelfuse 150A Orange Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4394
  • Mfr. Part No. 0298150.ZXEH
Each
HK$48.90
In Stock
RS PRO 2A British Standard Fuse, E1, 240V ac
  • RS Stock No. 521-2810
Each (In a Pack of 5)
HK$30.65
In Stock
ABB 50A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9962
  • Mfr. Part No. OFAF000H50 1SCA022627R1210
Each
HK$35.50
Temporarily out of stock
ABB RCBO, 13A Current Rating, 4P Poles, Type C
  • RS Stock No. 237-5207
  • Mfr. Part No. 2CSR274101R1134
Each
HK$3,559.57
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 9 kA, Withdrawable
  • RS Stock No. 239-855
  • Mfr. Part No. 192275 NZMH3-PX400-TAZ-AVE
Each
HK$64,945.00
Temporarily out of stock
Legrand DX3 RCD, 32A, 1+N Pole, 30mA, Type AC
  • RS Stock No. 731-9944
  • Mfr. Part No. 4 111 61
Each
HK$3,855.57
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 250-4252
  • Mfr. Part No. 1SDA054550R1
Each
HK$61,140.15
Temporarily out of stock
Siemens 5SM2323 RCCB, 40A, 2 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 231-8299
  • Mfr. Part No. 5SM2323-0
Each
HK$971.90
In Stock
Eaton 2.6A Resettable Fuse, 6V
  • RS Stock No. 225-8250
  • Mfr. Part No. PTSLR12066V260
1 Reel of 2500
HK$6,199.60
In Stock
Eaton 100mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 852-7411
  • Mfr. Part No. GDC-100MA
Each (In a Pack of 5)
HK$56.00
Temporarily out of stock
Eaton 20A Cartridge Fuse, 95 x 76mm
  • RS Stock No. 246-330
  • Mfr. Part No. 1713625 LPC20-ADAPTER
1 Pack of 10
HK$129.60
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