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

33 of 999+
Schneider Electric Multi 9 C60H-DC MCB, 2P, 4A Curve C, 500V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2471
  • Mfr. Part No. M9U21204
Each
HK$1,018.70
ABB Tmax XT Key Lock for use with Tmax XT
  • RS Stock No. 237-6099
  • Mfr. Part No. 1SDA066593R1 KLC XT1
Each
HK$877.91
Littelfuse 0.5A Resettable Fuse, 24V dc
  • RS Stock No. 517-7111
  • Mfr. Part No. MINISMDC050F-2
Each (In a Pack of 10)
HK$2.11
Better World
Schneider Electric Acti 9 C120N MCB, 2P, 100A Curve C, 440V AC, 250V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3058
  • Mfr. Part No. A9N18362
Each
HK$3,136.58
Better World
Schneider Electric RCBO, 16A Current Rating, 1P Poles, 30mA Trip Sensitivity, Acti9 Range
  • RS Stock No. 201-2236
  • Mfr. Part No. A9DC3616
Each
HK$1,651.40
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 4 channels
  • RS Stock No. 157-228
  • Mfr. Part No. 3VA2163-8JP42-0AA0
Each
HK$19,404.40
Schneider Electric 32A Rail Mount Fuse Holder
  • RS Stock No. 230-1210
  • Mfr. Part No. 15624
Each
HK$101.70
Sato Parts 10A Panel Mount Fuse Holder for 6.4 x 30mm Fuse, 250V ac
  • RS Stock No. 627-2093
  • Mfr. Part No. F-4000-A
Each (In a Pack of 5)
HK$31.48
RS PRO 1A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8093
Each (In a Pack of 20)
HK$4.255
RS PRO 6.3 A PCB Mount Fuse Holder, 1P for 5 x 20 mm, 250 V
  • RS Stock No. 277-3911
Each (In a Pack of 5)
HK$27.914
Better World
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 232-0270
  • Mfr. Part No. 1SDA068092R1 XT4N 250 TMA 250A FF
Each
HK$6,967.20
Siemens 630A Solid Link for LV HRC Fuses
  • RS Stock No. 395-711
  • Mfr. Part No. 3NG1402
Each
HK$602.90
Eaton xE?ect - FRCdM RCCB, 25A, 4 Pole, 300mA, 240/415V ac
  • RS Stock No. 121-213
  • Mfr. Part No. 167888 FRCDM-25/4/03-S/B+
Each
HK$8,931.80
Better World
Schneider Electric iID RCCB, 100A, 4 Pole, 30mA, Type AC, 415V ac
  • RS Stock No. 248-3694
  • Mfr. Part No. A9R11491
Each
HK$6,693.70
ABB ZLS Terminal for SMISSLINE TP System
  • RS Stock No. 231-9541
  • Mfr. Part No. 2CCA183441R0001 ZLS919
1 Box of 1
HK$1,066.30
ABB Electronic Circuit Breaker 0.5A 24V EPD24, DIN Rail Mount
  • RS Stock No. 914-4590
  • Mfr. Part No. 2CDE601101R2905
Each
HK$1,291.50
Siemens 450A Centred Tag Fuse, NH2, 690V ac
  • RS Stock No. 397-385
  • Mfr. Part No. 3NE1333-0
Each (In a Pack of 3)
HK$3,132.733
Schurter 16A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 737-8237
  • Mfr. Part No. 3101.0040
Each (In a Bag of 5)
HK$34.74
Better World
Siemens SENTRON 5SY7 MCB, 4P, 1A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8974
  • Mfr. Part No. 5SY7401-7
Each
HK$1,682.20
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 1kV
  • RS Stock No. 768-6134
  • Mfr. Part No. D100997K
Each
HK$108.60
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