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

2314 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 16A, Breaking Capacity 70 kA
  • RS Stock No. 209-7027
  • Mfr. Part No. 3VA1196-6EE32-0AA0
Each
MYR1,521.13
Temporarily out of stock
Siemens 3SX5601 Cable Gland for use with Safety Switch
  • RS Stock No. 271-9536
  • Mfr. Part No. 3SX56011A
Each
MYR53.26
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 70 kA
  • RS Stock No. 209-6837
  • Mfr. Part No. 3VA1150-6EE32-0AA0
Each
MYR1,636.94
Temporarily out of stock
Eaton 4A Resettable Fuse, 6V
  • RS Stock No. 225-8260
  • Mfr. Part No. PTSLR12066V400
Each (In a Pack of 10)
MYR2.577
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3715
  • Mfr. Part No. 3VA2025-8JQ46-0AA0
Each
MYR13,714.95
Temporarily out of stock
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4867
  • Mfr. Part No. 3VA2580-7KQ42-0AA0
Each
MYR39,121.49
Temporarily out of stock
Better World
Siemens RCBO, 125A Current Rating, 2P Poles, 300mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 243-6227
  • Mfr. Part No. 5SU1624-6WK82
Each
MYR13,321.14
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9476
  • Mfr. Part No. 3VA1196-6GF46-0AA0
Each
MYR2,389.56
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 70 kA
  • RS Stock No. 209-6821
  • Mfr. Part No. 3VA1140-6EE42-0AA0
Each
MYR2,125.95
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3822
  • Mfr. Part No. 3VA2040-8KQ46-0AA0
Each
MYR12,132.19
In Stock
Bourns Non Resettable Fuse 4A, 125V ac
  • RS Stock No. 191-4595
  • Mfr. Part No. SF-2410HI400T-2
Each (On a Tape of 10)
MYR5.643
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5093
  • Mfr. Part No. 3VA2040-5HL42-0AA0
Each
MYR3,541.67
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-4618
  • Mfr. Part No. 1SDA072887R1
Each
MYR57,614.27
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 1+N, 10A Curve B, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-9027
  • Mfr. Part No. 5SY7510-6
Each
MYR388.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3995
  • Mfr. Part No. 3VA2110-7JQ46-0AA0
Each
MYR11,222.79
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4600
  • Mfr. Part No. 3VA2140-0HN32-0AA0
Each
MYR5,624.99
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3823
  • Mfr. Part No. 3VA2063-5HM36-0AA0
Each
MYR4,338.54
Temporarily out of stock
Siemens ALPHA Adapter Kit for use with ALPHA 400/630 DIN
  • RS Stock No. 216-4835
  • Mfr. Part No. 8GK9101-5KK01
Each
MYR105.73
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 25A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7788
  • Mfr. Part No. LV426521
Each
MYR3,029.85
Temporarily out of stock
Schurter TA36 Rocker Circuit Breaker - TA36 Single Pole 32 V dc, 277 V ac Voltage Rating, 6A Current Rating
  • RS Stock No. 221-5584
  • Mfr. Part No. 3-128-199
1 Box of 50
MYR2,272.31
1
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