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

2307 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9341
  • Mfr. Part No. 3VA1140-6GE46-0AA0
Each
MYR2,115.88
Temporarily out of stock
Siemens SENTRON Cover for use with 3VA1 250
  • RS Stock No. 210-9344
  • Mfr. Part No. 3VA9253-0KB04
Each
MYR182.23
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-3631
  • Mfr. Part No. 1SDA071606R1
Each
MYR47,485.47
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4292
  • Mfr. Part No. 1SDA072426R1
Each
MYR68,672.66
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4526
  • Mfr. Part No. 3VA2125-6HK36-0AA0
Each
MYR4,174.67
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3764
  • Mfr. Part No. 3VA2040-6HL46-0AA0
Each
MYR4,459.05
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-4744
  • Mfr. Part No. 1SDA073024R1
Each
MYR59,844.44
Temporarily out of stock
ALPHA 630 DIN, Abdeckung Höhe=150mm, Bre
  • RS Stock No. 229-9876
  • Mfr. Part No. 8GK9601-1KK11
Each (In a Pack of 10)
MYR131.916
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 320A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 270-3479
  • Mfr. Part No. 3VA1332-4GF42-0AA0
Each
MYR11,579.08
In Stock
Bourns 2A Resettable Fuse, 24V
  • RS Stock No. 245-9149P
  • Mfr. Part No. MF-LSMF200/24X-2
Each (Supplied on a Reel)
MYR2.999
Temporarily out of stock
Better World
Siemens SENTRON Wire Connector for use with 3VA5
  • RS Stock No. 269-7096
  • Mfr. Part No. 3VA9134-0JB10
Each (In a Pack of 4)
MYR33.493
Temporarily out of stock
Phoenix Contact Thermomagnetic Device Circuit Breaker Thermal Circuit Breaker - CB Single Pole 50V dc Voltage Rating,
  • RS Stock No. 212-8791
  • Mfr. Part No. 2800863
Each
MYR235.69
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 3 channels
  • RS Stock No. 259-3378
  • Mfr. Part No. 1SDA071302R1
Each
MYR269,207.35
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-6558
  • Mfr. Part No. 1SDA068033R1 DCL EKIP M-LRIU IN=40A XT4
Each
MYR6,604.70
Unavailable
Schneider Electric 690V ac Circuit Trip for use with Compact NSX 160/250 Circuit Breakers
  • RS Stock No. 219-9367
  • Mfr. Part No. LV430515
Each
MYR21,151.28
Temporarily out of stock
Lovato P1 MCB, 1+N, 32A Curve C, 230V AC
  • RS Stock No. 248-5619
  • Mfr. Part No. P1MB1MC32
Each
MYR292.38
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3645
  • Mfr. Part No. 3VA2025-5KQ42-0AA0
Each
MYR11,635.24
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 150A, Fixed Mount
  • RS Stock No. 260-7907
  • Mfr. Part No. C25H32M150
Each
MYR9,455.29
Temporarily out of stock
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7668
  • Mfr. Part No. 5TT4472-0
Each
MYR979.11
Temporarily out of stock
Siemens ALPHA Cover for use with ALPHA 400/630
  • RS Stock No. 216-4817
  • Mfr. Part No. 8GK4501-4KK22
Each
MYR1,060.09
1
2307
2329
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