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

49110 Products showing for Fuses & Circuit Breakers

66 of 999+
Temporarily out of stock
Better World
Schneider Electric EZ9 RCCB, 63A, 2 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 850-8583
  • Mfr. Part No. EZ9R33263
Each
SGD35.30(exc. GST)
In Stock
Siemens 350A Centred Tag Fuse, NH2, 690V ac
  • RS Stock No. 396-011
  • Mfr. Part No. 3NE1331-0
Each (In a Pack of 3)
SGD601.34(exc. GST)
Temporarily out of stock
Eaton 350A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 182-1589
  • Mfr. Part No. 170M3818D
Each
SGD310.18(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-747
  • Mfr. Part No. 3VA5460-5EF41-0AA0
Each
SGD5,791.30(exc. GST)
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 250-4151
  • Mfr. Part No. 1SDA054421R1
Each
SGD6,055.28(exc. GST)
In Stock
Mersen 30A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0621
  • Mfr. Part No. G1014582 / FR10GR69V30
Each
SGD18.31(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 32A, Fixed Mount
  • RS Stock No. 254-6297
  • Mfr. Part No. C10N3TM032
Each
SGD563.71(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 3130 3 Pole 240V Voltage Rating Snap In, 12A Current Rating
  • RS Stock No. 729-2811
  • Mfr. Part No. 3130-F130-P7T1-W02Q-12A
Each
SGD84.83(exc. GST)
In Stock
Schneider Electric Acti9 A9F MCB Mini Circuit Breaker, 2P, 16A Curve C, 500V AC, 10 kA Breaking Capacity
  • RS Stock No. 653-861
  • Mfr. Part No. A9F74216
Each
SGD127.95(exc. GST)
In Stock
Phoenix Contact Surge Protector, 20kA, DIN Rail Mount
  • RS Stock No. 207-2730
  • Mfr. Part No. 2906786
Each
SGD250.03(exc. GST)
Temporarily out of stock
Eaton 10A Bolted Tag Fuse, 240V ac, 35mm
  • RS Stock No. 181-8538
  • Mfr. Part No. LST10
1 Box of 20
SGD194.32(exc. GST)
Last RS stock
Schurter 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-7758
  • Mfr. Part No. 0034.3872
Each (In a Pack of 10)
SGD1.283(exc. GST)
In Stock
WJ Furse Copper Earth Bar L. 900mm x W. 90mm x H. 96mm 12 Ways
  • RS Stock No. 124-2507
  • Mfr. Part No. 7TCA083670R0605 LK207-12
Each
SGD632.18(exc. GST)
Temporarily out of stock
Eaton 1 Phase Surge Protector, 110 → 230 V dc, 12 → 110V ac, DIN Rail Mount
  • RS Stock No. 847-3686
  • Mfr. Part No. 102037 FAZ-XAA-NA12-110VAC
Each
SGD62.34(exc. GST)
In Stock
Siemens SENTRON Cover for use with Three-Phase Current Busbar
  • RS Stock No. 202-7166
  • Mfr. Part No. 5SH5514
Each (In a Pack of 10)
SGD4.039(exc. GST)
In Stock
Siemens Single Phase Industrial Surge Protection, 2A, 230V (Volts), DIN Rail Mount
  • RS Stock No. 266-9577
  • Mfr. Part No. 5SY1702-2
Each
SGD57.55(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 1 Phase Distribution Board, 20 Way
  • RS Stock No. 339-637
  • Mfr. Part No. SEA9DE40
Each
SGD460.36(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 3P, 13A Curve C, 277V AC
  • RS Stock No. 256-6763
  • Mfr. Part No. M9F22313
Each
SGD256.41(exc. GST)
In Stock
Europa Busbar
  • RS Stock No. 849-6279
  • Mfr. Part No. ECWBB6
Each
SGD6.23(exc. GST)
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 4P 630A, Fixed Mount
  • RS Stock No. 232-0128
  • Mfr. Part No. 1SDA060210R1 T6N630 FF TMA 630A
Each
SGD4,136.24(exc. GST)
1
66
2456
Results per page

Related links