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

166 of 999+
Stock information currently inaccessible
Mersen 30A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0522
  • Mfr. Part No. G1014582 / FR10GR69V30
Each (In a Box of 10)
HK$84.16
Last RS stock
Wickmann 2A Resettable Fuse, 8V dc
  • RS Stock No. 174-0789
  • Mfr. Part No. 1812L200THPR
Each (In a Pack of 20)
HK$3.295
Temporarily out of stock
Eaton NZM Auxiliary Contact for use with Circuit Breaker
  • RS Stock No. 246-808
  • Mfr. Part No. 189748 NZM2/3-XHIV-PI
Each
HK$723.59
Temporarily out of stock
Wickmann 0.12A Resettable Fuse, 48V dc
  • RS Stock No. 174-0407
  • Mfr. Part No. RF1343-000
1 Reel of 15000
HK$42,097.60
In Stock
SIBA 1.25A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3302
  • Mfr. Part No. 70-007-65/1.25A
Each (In a Pack of 10)
HK$5.672
Temporarily out of stock
Eaton 2A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8403P
  • Mfr. Part No. C14G2
Each (Supplied in a Box)
HK$13.11
Temporarily out of stock
ABB PBFC 3, 3+N Phase Busbar
  • RS Stock No. 200-511
  • Mfr. Part No. 1STQ007410A0000
Each
HK$7,104.80
Last RS stock
RS PRO 40A Bolted Tag Fuse, A3, 250 V dc, 690V ac, 73mm
  • RS Stock No. 221-3715
Each
HK$112.10
Temporarily out of stock
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-407
  • Mfr. Part No. 3VA5210-7ED31-2AA0
Each
HK$8,041.40
Temporarily out of stock
Siemens SENTRON Two Phase Busbar, 1mm Pitch
  • RS Stock No. 627-141
  • Mfr. Part No. 5ST3664-1HG
1 Pack of 10
HK$1,525.30
In Stock
Schurter Tin Plated Brass PCB Mount Fuse Clip for 5 x 20mm
  • RS Stock No. 484-8272
  • Mfr. Part No. 0751.0142
Each (In a Pack of 20)
HK$6.865
In Stock
Schurter CSO Silver Plated Copper Alloy Screw Mount Fuse Clip for 10.3 x 38mm Cartridge Fuse
  • RS Stock No. 893-6982
  • Mfr. Part No. 0751.0501
Each (In a Pack of 10)
HK$11.69
Temporarily out of stock
Eaton 3.15A Cartridge Fuse, 142 x 25.4mm
  • RS Stock No. 260-755
  • Mfr. Part No. 7.2OBWNA3.15
Each
HK$2,060.20
In Stock
Siemens 63A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-1130
  • Mfr. Part No. 5SE2363
Each (In a Pack of 10)
HK$37.96
Temporarily out of stock
U-shaped busbar Cu 10 mm
  • RS Stock No. 279-4292
  • Mfr. Part No. 790-193
Each
HK$36.50
Temporarily out of stock
Schneider Electric 30A Fuse Holder, 3P, 600V ac
  • RS Stock No. 212-362
  • Mfr. Part No. DFCC3
1 Pack of 4
HK$2,694.80
Temporarily out of stock
ABB System Pro M Compact S200MUC MCB, 2P, 10A Curve K, 440V AC, 440V DC, 25 kA Breaking Capacity
  • RS Stock No. 231-9737
  • Mfr. Part No. 2CDS272061R0427 S202 MUC K 10A 10 KA
1 Box of 1
HK$1,894.20
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-396
  • Mfr. Part No. 3VA6225-7HL31-2AA0
Each
HK$15,043.50
In Stock
ABB FH200 RCCB, 25A, 4 Pole, 30mA, Type AC
  • RS Stock No. 540-1644
  • Mfr. Part No. 2CSF204006R1250 FH204 AC-25/0,03
Each
HK$616.60
In Stock
Littelfuse 355A Grey, White Fuse Strips Car Fuse, 80V dc
  • RS Stock No. 226-1027
  • Mfr. Part No. 157.5701.6351
Each
HK$65.00
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