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

2324 / 999+
ABB System Pro M Compact S200 M UC MCB, 4P, 300mA Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-418
  • Mfr. Part No. 2CDS274061R0117
Each
MYR4,239.16
Schneider Electric, ComPacT MCCB 4P 160A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 429-402
  • Mfr. Part No. C16N6TM160
Each
MYR10,753.71
Schneider Electric Acti9 A9N1 MCB, 3P, 125A, Type A, 400-415V AC
  • RS Stock No. 212-173
  • Mfr. Part No. A9N18575
Each
MYR4,847.92
ABB S803S MCB, 3P, 50A Curve K, 690V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-720
  • Mfr. Part No. 2CCS863002R0577
Each
MYR2,066.52
RS PRO 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3423
Each (In a Pack of 10)
MYR1.994
Siemens 150A NH Fuse, NH3, 690 / 440V ac/dc
  • RS Stock No. 269-8329
  • Mfr. Part No. 3NC8423-0C
Each (In a Pack of 3)
MYR1,453.12
Bourns Single, Three Phase Surge Protector, 50kA, 1kV, DIN Rail Mount
  • RS Stock No. 287-9632
  • Mfr. Part No. 1250A-3S-230
Each (In a Box of 48)
MYR1,751.566
Eaton Eaton Moeller IZMX/INX Remote Switching Unit for use with INX16, INX40, IZMX16, IZMX40
  • RS Stock No. 244-491
  • Mfr. Part No. 184283 IZMX-SR48DC-1
Each
MYR1,759.90
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0893
  • Mfr. Part No. 3WA9111-0BG12
Each
MYR600.56
Better World
Siemens SENTRON Electronic Circuit Breaker 200A 3VA2, 3 channels
  • RS Stock No. 157-145
  • Mfr. Part No. 3VA2220-5MP32-0AA0
Each
MYR9,672.65
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 40A Curve B, 440V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2190
  • Mfr. Part No. A9F06440
Each
MYR1,208.71
Eaton NZM Jumper Link for use with N2-4-…-S1(-S15)-DC
  • RS Stock No. 121-181
  • Mfr. Part No. 170119 NZM2-4-XKVI2POU-K
Each
MYR1,071.06
Mersen 160A NH Fuse, NH00, 500V
  • RS Stock No. 768-3652
  • Mfr. Part No. J227869
Each
MYR99.61
Schurter SMD Non Resettable Fuse 2A, 32 V ac, 63V dc
  • RS Stock No. 665-7356P
  • Mfr. Part No. 3413.0119.22.
Each (Supplied on a Reel)
MYR2.527
ABB PS2 2 Phase Busbar, 400V
  • RS Stock No. 231-9639
  • Mfr. Part No. 2CDL220001R3058 PS 2/58/30
1 Box of 1
MYR563.18
ABB RCBO, 40A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 237-3390
  • Mfr. Part No. 2CSR252001R1404
Each
MYR1,290.61
ABB S302 MCB, 2P, 25A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 201-306
  • Mfr. Part No. 2CDS382001R0255
Each
MYR1,315.13
Better World
Siemens SIRIUS Electronic Circuit Breaker 630mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-204
  • Mfr. Part No. 3RV2421-0GA10
Each
MYR547.45
Siemens SENTRON Voltage Tap Module
  • RS Stock No. 277-0946
  • Mfr. Part No. 3WA9111-0EM12
Each
MYR1,673.64
WAGO 32A Fuse Holder for 10 x 38mm Fuse, 1P, 750V ac
  • RS Stock No. 279-1648
  • Mfr. Part No. 811-310
1 Box of 12
MYR972.73
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