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

46604 Products showing for Fuses & Circuit Breakers

19 / 999+
Eaton 16A D01 Neozed Fuse, gG, 400V ac
  • RS Stock No. 181-8563
  • Mfr. Part No. 16NZ01
Each (In a Box of 10)
MYR11.702
Eaton 50A gG/gL Cartridge Fuse, 14 x 51mm
  • RS Stock No. 228-672
  • Mfr. Part No. C14G50
1 Pack of 10
MYR96.00
Littelfuse 12A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 787-4303
  • Mfr. Part No. 0314012.HXP
Each (In a Pack of 5)
MYR3.198
Eaton 125A Centred Tag Fuse, NH02, 500V ac
  • RS Stock No. 703-8737
  • Mfr. Part No. 125NHG02B
Each
MYR67.18
Socomec 32A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 252-5317
  • Mfr. Part No. 60230032
Each (In a Pack of 10)
MYR10.317
Littelfuse 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4533
  • Mfr. Part No. 0218010.MXP
Each (In a Pack of 10)
MYR6.457
Eaton 160A Centred Tag Fuse, NH01, 500V ac
  • RS Stock No. 703-8702
  • Mfr. Part No. 160NHG01B
Each
MYR34.66
Mersen 630A size 32 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2158
  • Mfr. Part No. M300069
Each
MYR1,152.08
Eaton 20A Bolt In Mount 6.3 x 32mm Fuse Block, 300V ac/dc
  • RS Stock No. 852-7225
  • Mfr. Part No. S-8201-1-R
Each
MYR8.67
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
Better World
Siemens RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6168
  • Mfr. Part No. 5SU1324-7FP16
Each
MYR1,487.51
Better World
Siemens Sentron 5SY6 MCB, 2P, 3A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3626
  • Mfr. Part No. 5SY6203-7
Each
MYR354.79
Better World
ABB System Pro M Compact S200 MCB, 3P, 10A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7595
  • Mfr. Part No. 2CDS253001R0105 S203-B10
Each
MYR402.28
ABB F200 RCCB, 25A, 2 Pole, 30mA, Type AC, 230V
  • RS Stock No. 537-7355
  • Mfr. Part No. 2CSF202001R1250 F202 AC-25/0,03
Each
MYR939.60
Schurter 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 777-7489
  • Mfr. Part No. 0034.1519
Each (In a Pack of 10)
MYR1.641
Schurter 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7801
  • Mfr. Part No. 0001.2511
Each (In a Bag of 10)
MYR3.151
Eaton 10A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-598
  • Mfr. Part No. TDC180-10A
Each (In a Pack of 10)
MYR4.423
Schneider Electric Acti9 iID RCCB, 100A, 4 Pole, 100mA, Type AC, 380 → 415V ac
  • RS Stock No. 130-796
  • Mfr. Part No. A9R12491
Each
MYR2,713.01
Phoenix Contact Thermal Circuit Breaker - TCP 4A Single Pole 65 V dc, 250V ac Voltage Rating, 4A Current Rating
  • RS Stock No. 801-6909
  • Mfr. Part No. 0712259
Each
MYR86.79
RS PRO Rail Mount Fuse Holder
  • RS Stock No. 501-871
Each
MYR75.04
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