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 產品顯示為 Fuses & Circuit Breakers

6 的 999+
Better World
Siemens SENTRON 5SY5 MCB, 2P, 32A Curve C, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS庫存編號 212-8892
  • 製造零件編號 5SY5232-7
个
HK$1,574.10
RS PRO 200mA F Glass Cartridge Fuse, 5 x 20mm
  • RS庫存編號 563-479
个（每托盘 10 ）
HK$3.04
Siemens 20A NH Fuse, NH000, 500V ac
  • RS庫存編號 397-559
  • 製造零件編號 3NA6807
个（每托盘 3 ）
HK$56.233
Schneider Electric RCBO, 16A Current Rating, 3P Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS庫存編號 212-247
  • 製造零件編號 A9D17316
个
HK$2,873.47
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 36 kA, Fixed Mount
  • RS庫存編號 209-4847
  • 製造零件編號 3VA1063-4ED42-0AA0
个
HK$3,596.50
Mersen 250A Bolted Tag Fuse, B3X, 240 V dc, 415V ac, 133mm
  • RS庫存編號 178-1072
  • 製造零件編號 C226322 / BTKM42V250
个
HK$316.31
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS庫存編號 209-5093
  • 製造零件編號 3VA2040-5HL42-0AA0
个
HK$6,851.30
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 55 kA
  • RS庫存編號 209-7052
  • 製造零件編號 3VA2040-5HL32-0AA0
个
HK$5,077.30
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 25 kA, Fixed Mount
  • RS庫存編號 211-3735
  • 製造零件編號 3VA1140-3EF46-0AA0
个
HK$4,486.80
Schneider Electric MCCB 4P, Fixed Mount
  • RS庫存編號 178-7898
  • 製造零件編號 LV426961
个
HK$392.93
Littelfuse SMD Non Resettable Fuse 2.5A, 125V
  • RS庫存編號 738-2863
  • 製造零件編號 015402.5DR
个（每托盘 10 ）
HK$15.38
Europa EUC1P EUB MCB, 1P, 20A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS庫存編號 849-6471
  • 製造零件編號 EUC1P20B
个
HK$62.00
Better World
Siemens SENTRON 5SY8 MCB, 1+N, 16A Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS庫存編號 213-1118
  • 製造零件編號 5SY8516-7
个
HK$576.40
Eaton xEffect MCB, 1P, 3A Curve C, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS庫存編號 922-7002
  • 製造零件編號 278551 FAZ-C3/1
个
HK$237.50
Eaton xEffect MCB, 1P, 16A Curve C, 240 → 415V AC, 48V DC, 10 kA Breaking Capacity
  • RS庫存編號 922-6905
  • 製造零件編號 102090 FAZ-C16/1-NA
个
HK$346.20
RS PRO PC Board Non Resettable Fuse, Axial 4A, 250V ac
  • RS庫存編號 764-9560
个（每托盘 10 ）
HK$4.77
Better World
ABB System Pro M Compact S200 MCB, 3P, 4A Curve C, 400V AC, 110V DC, 6 kA Breaking Capacity
  • RS庫存編號 746-7753
  • 製造零件編號 2CDS253001R0044 S203-C4
个
HK$734.64
Better World
ABB System Pro M Compact S200 MCB, 1P, 50A Curve B, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS庫存編號 746-7551
  • 製造零件編號 2CDS251001R0505 S201-B50
个
HK$143.80
Better World
Siemens Sentron 5SY4 MCB, 2P, 6A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS庫存編號 772-1290
  • 製造零件編號 5SY4206-8
个
HK$819.80
Eaton xEffect MCB, 1P, 2A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS庫存編號 769-4570
  • 製造零件編號 239031 FAZ6-C2/1
个
HK$242.40
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