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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

169 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9849
  • Mfr. Part No. 3VA1125-3GE46-0AA0
Each
MYR2,326.97
Temporarily out of stock
ABB S804C MCB, 4P, 50A Curve D, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 141-071
  • Mfr. Part No. 2CCS884001R0501
Each
MYR1,491.85
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 65V dc Voltage Rating DIN Rail, 1.5A Current Rating
  • RS Stock No. 135-442
  • Mfr. Part No. 0914264
1 Pack of 6
MYR2,301.96
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 1+N, 50A Curve B, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-586
  • Mfr. Part No. 2CDS271103R0505
Each
MYR1,063.32
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 1+N, 63A Curve D, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 203-843
  • Mfr. Part No. 2CDS271103R0631
Each
MYR1,394.03
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 4P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-6005
  • Mfr. Part No. 3VA1125-5EF42-0AA0
Each
MYR2,853.58
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 4P 500A, Fixed Mount
  • RS Stock No. 250-4205
  • Mfr. Part No. 1SDA054493R1
Each
MYR31,909.12
Temporarily out of stock
ABB Tmax XT Rear Terminal for use with Tmax XT
  • RS Stock No. 237-6168
  • Mfr. Part No. 1SDA066940R1 R XT1 8PCS
Each
MYR1,021.08
In Stock
Siemens 63A Base Mount Fuse Holder for D02 Fuse, 3P, 400V
  • RS Stock No. 156-053
  • Mfr. Part No. 5SG6208
1 Pack of 6
MYR585.48
Temporarily out of stock
ABB S302 MCB, 2P, 16A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-909
  • Mfr. Part No. 2CDS382001R0165
Each
MYR1,218.43
In Stock
Better World
Schneider Electric Acti 9 IC60L MCB, 2P, 3A, Type Z, 400V AC, 125V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 212-0120
  • Mfr. Part No. A9F92203
Each
MYR664.03
Temporarily out of stock
ABB S301 MCB, 1+N, 1.6A, Type Z, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 204-472
  • Mfr. Part No. 2CDS381103R0258
Each
MYR1,476.29
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 32A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3350
  • Mfr. Part No. A9F54232
Each
MYR584.57
In Stock
ABB RCBO, 63A Current Rating, 2P Poles, Type B
  • RS Stock No. 237-5144
  • Mfr. Part No. 2CSR272001R1635
Each
MYR1,574.37
In Stock
Eaton, xEnergy MCCB 3P 40A, Breaking Capacity 25 kA
  • RS Stock No. 454-8039
  • Mfr. Part No. 259075 NZMB1-A40
Each
MYR2,240.73
Currently unavailable
ABB S302 MCB, 2P, 2A Curve K, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 201-308
  • Mfr. Part No. 2CDS382001R0277
Each
MYR1,663.25
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 4P, 20A Curve K, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 204-291
  • Mfr. Part No. 2CDS384001R0487
Each
MYR2,585.13
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3P, 3A, Type Z, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 202-926
  • Mfr. Part No. 2CDS273001R0318
Each
MYR2,392.24
In Stock
Eaton 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9430
  • Mfr. Part No. S505-5-R
1 Bag of 1000
MYR1,241.76
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 4P, 4A, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-425
  • Mfr. Part No. 2CDS274061R0338
Each
MYR4,990.39
1
169
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