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

46580 Products showing for Fuses & Circuit Breakers

64 / 999+
In Stock
Eaton PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 852-7196
  • Mfr. Part No. PCC-2-R
Each
MYR40.53
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 3P, 16A Curve C, 15 kA Breaking Capacity
  • RS Stock No. 219-9284
  • Mfr. Part No. A9F94316
Each
MYR1,092.31
In Stock
SIBA 40A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-4201
  • Mfr. Part No. 50-124-06/40A
Each
MYR77.16
Temporarily out of stock
Schneider Electric Acti9 4 Phase Extension Box, 200 A
  • RS Stock No. 335-401
  • Mfr. Part No. SEA9PNI2004
Each
MYR8,606.92
In Stock
RS PRO 800mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8125
Each (In a Pack of 50)
MYR1.611
In Stock
Schneider Electric Acti9 iC60 RCCB, 32A, 2 Pole, 30mA, Type C, 220 → 240V ac
  • RS Stock No. 110-285
  • Mfr. Part No. A9D07232
Each
MYR3,569.84
In Stock
Better World
Schneider Electric Multi 9 C60BP MCB, 2P, 30A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2448
  • Mfr. Part No. M9F43230
Each
MYR707.34
In Stock
Schurter 16A PCB Mount Fuse Holder for 5 x 20 mm, 6.3 x 32 mm Fuse, 600V ac
  • RS Stock No. 167-6951
  • Mfr. Part No. 0751.0056
1 Bag of 20
MYR28.34
In Stock
ABB RCBO, 40A Current Rating, 3P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 767-4431
  • Mfr. Part No. 2CSR273001R1404 DS203 M AC-C40/0,03
Each
MYR1,730.37
In Stock
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 10A Current Rating
  • RS Stock No. 210-2062
  • Mfr. Part No. 3120-N521-H7T1-W01D-10A
Each
MYR206.12
In Stock
ABB, Tmax XT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 236-7280
  • Mfr. Part No. 1SDA067409R1 XT1C 160 TMD 125A FF
Each
MYR2,788.25
In Stock
Schneider Electric TransferPacT Electronic Circuit Breaker 63A TA100, Fixed
  • RS Stock No. 272-7579
  • Mfr. Part No. TA10D2S0633TPE
Each
MYR7,485.80
In Stock
ABB FH200 RCCB, 63A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 186-3460
  • Mfr. Part No. 2CSF202102R1630
Each
MYR552.48
Limited stock
Better World
Siemens Sentron 5SY6 MCB, 3P, 32A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 489-6473
  • Mfr. Part No. 5SY6332-7
Each
MYR493.29
Temporarily out of stock
Better World
Siemens, SENTRON Circuit breaker 4P 160A, DIN Rail Mount
  • RS Stock No. 224-7814
  • Mfr. Part No. 3VA1116-4GF42-0AA0
Each
MYR5,495.98
In Stock
Siemens SENTRON Busbar, 60mm Pitch
  • RS Stock No. 196-3719
  • Mfr. Part No. 8US19222UA01
Each
MYR764.13
Limited stock
ETA Thermal Circuit Breaker - 2-5700 Single Pole 250V Voltage Rating Panel Mount, 15A Current Rating
  • RS Stock No. 405-9157
  • Mfr. Part No. 2-5700-IG1-P10-DD-000040-15A
Each
MYR159.27
Last RS stock
Mersen 1A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 270-3141
  • Mfr. Part No. Y095563
Each (In a Box of 10)
MYR4.663
Limited stock
Siemens 200A NH Fuse, NH1, 1kV, 110mm
  • RS Stock No. 396-180
  • Mfr. Part No. 3NE3225
Each (In a Pack of 3)
MYR1,035.96
In Stock
Eaton RCD, 20A, 2 Pole, 30mA, Type C
  • RS Stock No. 922-8733
  • Mfr. Part No. 236245 PKNM-20/1N/C/003-MW
Each
MYR850.64
1
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