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

337 / 999+
Temporarily out of stock
Eaton Three Phase Surge Protector, 12.5kA, 1.5kV, DIN Rail Mount
  • RS Stock No. 120-843
  • Mfr. Part No. 158333 SPBT12-280-3+NPE/BB
Each
MYR6,076.16
In Stock
Rockwell Automation FB50 Busbar, 1000V
  • RS Stock No. 282-2351
  • Mfr. Part No. FB50352Q1
Each (In a Pack of 8)
MYR85.939
Temporarily out of stock
ABB RCBO, 10A Current Rating, 3P Poles, Type C
  • RS Stock No. 237-5062
  • Mfr. Part No. 2CSR253001R1104
Each
MYR1,625.72
In Stock
Better World
Schneider Electric Acti9 Cover for use with Comb Busbar
  • RS Stock No. 237-5595
  • Mfr. Part No. A9X21095
Each (In a Pack of 40)
MYR4.903
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 1P, 50A Curve C
  • RS Stock No. 216-4321
  • Mfr. Part No. 5SL6150-7
Each
MYR224.88
Temporarily out of stock
RS PRO 500mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8059
1 Box of 1000
MYR5,757.21
Temporarily out of stock
Schneider Electric Acti9 3, 3+N Phase Distribution Board, 4 Way, 250 A
  • RS Stock No. 339-830
  • Mfr. Part No. SEA9BPN4TN
Each
MYR1,079.65
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 160A, Fixed Mount
  • RS Stock No. 254-6345
  • Mfr. Part No. C16F3TM160
Each
MYR5,389.93
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 32A, Fixed Mount
  • RS Stock No. 254-6276
  • Mfr. Part No. C10B3TM032
Each
MYR2,733.92
Temporarily out of stock
Schneider Electric Acti9 iC60 RCCB, 25A, 30mA, 230V
  • RS Stock No. 357-677
  • Mfr. Part No. A9Q81425
Each
MYR3,170.43
Temporarily out of stock
Eaton MCCB 3P, Fixed Mount
  • RS Stock No. 229-373
  • Mfr. Part No. 115392 NZM2-XRD380-440AC
Each
MYR4,171.62
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 1P, 750mA Curve K, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 201-164
  • Mfr. Part No. 2CDS271347R0187
Each
MYR881.33
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-6013
  • Mfr. Part No. 3VA1140-5ED42-0AA0
Each
MYR2,350.23
In Stock
Better World
Schneider Electric Multi 9 MCB, 4P, 16A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9138
  • Mfr. Part No. M9F22416
Each
MYR1,068.71
Temporarily out of stock
SENTRON Wire Connector for use with 3VA61/62 Series
  • RS Stock No. 263-761
  • Mfr. Part No. 3VA9143-0JG11
1 Kit
MYR217.82
Temporarily out of stock
Legrand DX Range DX3 MCB, 3P, 40A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9736
  • Mfr. Part No. 4 078 33
Each
MYR1,235.29
Temporarily out of stock
Mersen 100A Bolted Tag Fuse, A4C, 240 V dc, 415V ac, 94mm
  • RS Stock No. 178-1044
  • Mfr. Part No. B226298 / BTCP42V100M160
Each (In a Pack of 10)
MYR166.50
Temporarily out of stock
ABB S800PV MCB, 4P, 5A Curve B, 1500V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5914
  • Mfr. Part No. 2CCF019586R0001 S804PV-SP5 - 5 kA
Each
MYR2,314.83
Temporarily out of stock
ABB High Performance S800S MCB, 1P, 63A Curve B, 400V AC, 250V DC, 50 kA Breaking Capacity
  • RS Stock No. 435-318
  • Mfr. Part No. 2CCS861001R0635 S801S-B63
Each
MYR475.01
Temporarily out of stock
RS PRO SMD Non-Resettable Surface Mount Fuse 2.5A, 63V
  • RS Stock No. 252-2195
Each (On a Tape of 4000)
MYR0.645
1
337
2329
Results per page

Related links