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

47305 Products showing for Fuses & Circuit Breakers

9 of 999+
In Stock
ABB System Pro M Compact S200M MCB, 3P, 10A Curve C, 440V AC, 12V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4267
  • Mfr. Part No. 2CDS273001R0104 S203M-C10
Each
TWD3,028.00(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 20A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4222
  • Mfr. Part No. 3VA1120-3ED36-0AA0
Each
TWD13,015.00(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3611
  • Mfr. Part No. 3VA2010-8JP32-0AA0
Each
TWD67,663.00(exc. GST)
In Stock
Schneider Electric RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type AC, Acti9 Range
  • RS Stock No. 276-8718
  • Mfr. Part No. A9D07216
Each
TWD16,892.00(exc. GST)
Temporarily out of stock
WJ Furse Copper Earth Clamp Max. Conductor Size 25 x 3mm Nominal Rod dia. 10mm 26mm
  • RS Stock No. 153-2956
Each (In a Pack of 10)
TWD285.30(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3344
  • Mfr. Part No. A9F54216
Each
TWD3,883.00(exc. GST)
In Stock
Better World
Schneider Electric ID RCCB, 40A, 4 Pole, 300mA, Type AC, 415V ac
  • RS Stock No. 214-2100
  • Mfr. Part No. M9R14440
Each
TWD4,183.00(exc. GST)
Temporarily out of stock
63A Tag Fuse, 31 x 110mm, 415V, 82mm
  • RS Stock No. 262-399
  • Mfr. Part No. 63MJ30-8
1 Pack of 10
TWD18,487.00(exc. GST)
In Stock
Littelfuse 10A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 787-4283
  • Mfr. Part No. 35621000029
Each (In a Pack of 5)
TWD52.60(exc. GST)
In Stock
Littelfuse 32mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8057
  • Mfr. Part No. 0218.032MXP
Each (In a Bag of 10)
TWD54.30(exc. GST)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 63A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 255-582
  • Mfr. Part No. 265744 NZMH2-S63
Each
TWD18,314.00(exc. GST)
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 20 kA, Fixed Mount
  • RS Stock No. 232-0088
  • Mfr. Part No. 1SDA054396R1 T5N630 FF PR221-LS 630A
Each
TWD78,685.00(exc. GST)
In Stock
Schurter OG Tin Plated Bronze PCB Mount Fuse Clip for 5 x 20mm Fuse Clip Fuse
  • RS Stock No. 269-3795
  • Mfr. Part No. 0751.0099
Each
TWD13.00(exc. GST)
Temporarily out of stock
Siemens Single Phase Industrial Surge Protection, 2A, 230V (Volts), DIN Rail Mount
  • RS Stock No. 266-9578
  • Mfr. Part No. 5SY1702-4
Each
TWD1,409.00(exc. GST)
Limited stock
Limitor Thermal Fuse +133°C 15 A, 250V ac
  • RS Stock No. 797-6055
  • Mfr. Part No. SF 129 R
Each (In a Pack of 10)
TWD30.20(exc. GST)
In Stock
Legrand 500mA M Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 266-3098
  • Mfr. Part No. 0 130 95
1 Box of 10
TWD1,029.00(exc. GST)
Temporarily out of stock
TE Connectivity Thermal Magnetic Circuit Breakers - Potter & Brumfield W54 Single Pole 250V ac Voltage Rating Panel
  • RS Stock No. 240-8954
  • Mfr. Part No. 3-1393250-2
Each (In a Bag of 100)
TWD204.90(exc. GST)
Temporarily out of stock
Better World
Schneider Electric iID RCCB, 63A, 4 Pole, 500mA, Type B-SI, 400V ac
  • RS Stock No. 248-3728
  • Mfr. Part No. A9Z66463
Each
TWD64,851.00(exc. GST)
In Stock
Eaton 1.6A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1357
  • Mfr. Part No. S506-1.6-R
Each (In a Pack of 10)
TWD25.70(exc. GST)
In Stock
Eaton 2A Grey Blade Car Fuse, 32V dc
  • RS Stock No. 849-5620
  • Mfr. Part No. ATC-2
Each
TWD64.00(exc. GST)
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