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

46578 Products showing for Fuses & Circuit Breakers

273 / 999+
Temporarily out of stock
Wickmann 30A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0229
  • Mfr. Part No. 0505030.MXP
1 Box of 1000
MYR17,966.67
In Stock
Wurth Elektronik Plastic Base Mount Fuse Holder Cover for 5 x 20mm Fuse
  • RS Stock No. 893-0592
  • Mfr. Part No. 696120004001
Each (In a Pack of 10)
MYR1.376
Temporarily out of stock
Schneider Electric 12 Way Metal Consumer Unit, 100A, IP3x (with cover), IPxx D (on top) EZ9E12
  • RS Stock No. 245-134
  • Mfr. Part No. EZ9E12MCU
Each
MYR614.38
Temporarily out of stock
Siemens 20A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 203-2003
  • Mfr. Part No. 3NW6007-1
Each (In a Pack of 20)
MYR23.67
In Stock
Eaton xPole PXL, S200 MCB, 1P, 6A Curve B, 400V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 486-952
  • Mfr. Part No. 236027 PXL-B6/1
Each
MYR67.79
Temporarily out of stock
Eaton 125A Tag Fuse, 40 x 135mm, 500V
  • RS Stock No. 244-284
  • Mfr. Part No. 125NHG1B
1 Pack of 3
MYR142.32
Temporarily out of stock
630A Fuse Holder for 250 x 3254mm Fuse, 3P, 690V
  • RS Stock No. 262-040
  • Mfr. Part No. EBH3O3TS8
Each
MYR1,501.96
Temporarily out of stock
Schneider Electric Altivar Process Modular Busbar, 380 → 480V
  • RS Stock No. 578-366
  • Mfr. Part No. VW3A98CTM03
Each
MYR3,282.43
Temporarily out of stock
SENTRON Wire Connector for use with 3VA53/54, 3VA63/64 Series
  • RS Stock No. 263-941
  • Mfr. Part No. 3VA9373-0JC24
1 Kit
MYR1,482.88
Unavailable
Schneider Electric, NSX MCCB 4P 400A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 219-8364
  • Mfr. Part No. LV432408
Each
MYR17,994.52
In Stock
Littelfuse 3.75A Resettable Fuse, 72V
  • RS Stock No. 517-6758
  • Mfr. Part No. RXEF375
Each (In a Pack of 10)
MYR3.722
Temporarily out of stock
Schneider Electric, Compact MCCB 3P 630A, Breaking Capacity 75 kA, Fixed Mount
  • RS Stock No. 340-918
  • Mfr. Part No. C063B3FM
Each
MYR18,962.62
In Stock
Europa EUC1P EUC MCB, 1P, 40A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6522
  • Mfr. Part No. EUC1P40C
Each
MYR37.67
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 4P 630A, Fixed Mount
  • RS Stock No. 231-9333
  • Mfr. Part No. 1SDA100388R1 XT5N 630 TMA 630-6300 4pFF
Each
MYR13,601.48
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3911
  • Mfr. Part No. 3VA2063-8KP42-0AA0
Each
MYR10,899.16
Temporarily out of stock
25A Cartridge Fuse, 1.5 x 0.58in
  • RS Stock No. 263-414
  • Mfr. Part No. TPA-25
1 Pack of 10
MYR1,741.00
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 2P, 32A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 214-2068
  • Mfr. Part No. M9F11232
Each
MYR431.66
Temporarily out of stock
Eaton Busbar, 600V ac, 60mm Pitch
  • RS Stock No. 178-8005
  • Mfr. Part No. 101452 BBA0-32
Each
MYR205.40
Temporarily out of stock
Eaton xEffect MCB, 2P, 25A Curve B, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4438
  • Mfr. Part No. 239090 FAZ6-B25/2
Each
MYR269.54
Temporarily out of stock
Hager BD Series RCCB, 25A, 2 Pole, 30mA, Type A-HI, 230V
  • RS Stock No. 597-891
  • Mfr. Part No. BD225
Each
MYR1,873.13
1
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