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

205 / 999+
Siemens, SENTRON MCCB 3P 15A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-603
  • Mfr. Part No. 3VA5195-1MU31-0AA0
Each
MYR2,519.51
MECATRACTION Brass Earth Clamp 30mm
  • RS Stock No. 284-6334
  • Mfr. Part No. 1BR1430
1 Box of 10
MYR880.44
ABB SN201 MCB, 1+N, 40A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 186-3491
  • Mfr. Part No. 2CSS255102R0404 SN201 C40-L
Each
MYR321.53
Schneider Electric, PowerPact MCCB 4P 100A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 346-819
  • Mfr. Part No. BJF46100
Each
MYR9,467.14
Legrand DX3 RCCB, 63A, 3+N Pole, 300mA, Type AC
  • RS Stock No. 732-0089
  • Mfr. Part No. 4 116 66
Each
MYR1,929.63
Siemens SENTRON 5SP4 MCB, 4P, 125A Curve B, 400V AC
  • RS Stock No. 209-7507
  • Mfr. Part No. 5SP4492-6
Each
MYR3,184.93
Schneider Electric Acti9 3+N/PE Phase Distribution Board, 12 Way, 250 A
  • RS Stock No. 336-620
  • Mfr. Part No. SEA9BN12E
Each
MYR2,306.99
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 50 kA, Plug In
  • RS Stock No. 231-261
  • Mfr. Part No. 111657 NZMN3-4-AE400-BT
Each
MYR16,909.19
Bourns 0.2A Resettable Fuse, 24V
  • RS Stock No. 647-8279
  • Mfr. Part No. MF-NSMF020-2
Each (In a Pack of 10)
MYR1.812
Better World
Schneider Electric Acti 9 iC60N MCB, 4P, 40A Curve C, 100 → 130V AC, 12 → 250V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9188
  • Mfr. Part No. A9F77440
Each
MYR1,735.57
Eaton Eaton Moeller 3 Phase Busbar, 600V, 17.6mm Pitch
  • RS Stock No. 123-038
  • Mfr. Part No. 171133 Z-BB/UL25/3P1MU/57
Each
MYR222.80
Eaton 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 233-0567
  • Mfr. Part No. BK14-HTC-613M
1 Box of 1400
MYR26,653.20
Siemens 1 Phase Surge Arrester, 40kA, 3.7kV, DIN Rail Mount
  • RS Stock No. 269-9752
  • Mfr. Part No. 5SD7483-0KK02
Each
MYR740.55
Littelfuse 32mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8045
  • Mfr. Part No. 0217.032MXP
Each (In a Bag of 10)
MYR13.098
Schneider Electric Acti9 3 Phase Distribution Board, 18 Way, 250 A
  • RS Stock No. 207-266
  • Mfr. Part No. SE54B250
Each
MYR5,141.00
Better World
Siemens SENTRON 5SL6 MCB, 1+N, 13A Curve B, 230V AC, 72V DC
  • RS Stock No. 212-8944
  • Mfr. Part No. 5SL6513-6
Each
MYR269.39
Better World
ABB System Pro M Compact S200 MCB, 1+N, 50A Curve C
  • RS Stock No. 237-3212
  • Mfr. Part No. 2CDS251103R0504
Each
MYR363.46
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4832
  • Mfr. Part No. 3VA2563-7MN32-0AA0
Each
MYR22,933.34
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-647
  • Mfr. Part No. 3VA6580-5JQ32-2AA0
Each
MYR39,760.78
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7666
  • Mfr. Part No. 5TT4468-0
Each
MYR690.12
1
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