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

8 / 999+
SIBA 80A NH Fuse, NH000, 500V ac
  • RS Stock No. 421-716
  • Mfr. Part No. 20-000-13/80E1
Each (In a Pack of 3)
MYR41.83
RS PRO 12.5A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 420-224
Each (In a Pack of 10)
MYR13.353
SIBA 16A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 421-637
  • Mfr. Part No. 20-000-13/16E1
Each (In a Pack of 3)
MYR38.207
RS PRO 2.5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9787
Each (In a Pack of 10)
MYR2.636
RS PRO PC Board Non Resettable Fuse 5A, 250V ac
  • RS Stock No. 911-3565
Each (In a Pack of 10)
MYR1.702
ETI 2A D01 Neozed Fuse, E14 Thread Size, gG, 400V ac
  • RS Stock No. 415-935
  • Mfr. Part No. 2211001
Each (In a Pack of 5)
MYR4.822
RS PRO Earthing Strap Metal 12 → 32mm Diameter
  • RS Stock No. 390-2448
Each (In a Pack of 10)
MYR11.328
Siemens 200A NH Fuse, NH1, 500V ac
  • RS Stock No. 396-083
  • Mfr. Part No. 3NA3140
Each (In a Pack of 3)
MYR82.72
Littelfuse 1A Black Blade Car Fuse, 32V dc
  • RS Stock No. 787-4110
  • Mfr. Part No. 0287001.PXCN
Each (In a Pack of 10)
MYR1.663
ABB 24V dc Undervoltage Release Circuit Trip for use with DS200, DS201, DS202C, F200, S200, SN201
  • RS Stock No. 225-6151
  • Mfr. Part No. 2CSS200911R0007 S2C-UA 24 VDC
Each
MYR557.88
ETI 63A D02 Neozed Fuse, E18 Thread Size, gG, 400V ac
  • RS Stock No. 416-023
  • Mfr. Part No. 2212005
Each (In a Pack of 5)
MYR6.458
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 320A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 232-0083
  • Mfr. Part No. 1SDA054117R1 T4N320 FF PR221-LS 320A
Each
MYR6,949.99
Siemens 80A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-664
  • Mfr. Part No. 3NA3824
Each (In a Pack of 3)
MYR126.38
RS PRO 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3414
Each (In a Pack of 10)
MYR2.066
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 10A Current Rating
  • RS Stock No. 210-2059
  • Mfr. Part No. 3120-N32V-H7T1-SGRX-10A-U0000M
Each
MYR343.66
RS PRO 1.6A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9670
Each (In a Pack of 10)
MYR1.959
ABB 36 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1903
  • Mfr. Part No. 1SL1206A00 65P12X32
Each
MYR575.33
Eaton 70 → 100A Ferrule Fuse Block, 600V
  • RS Stock No. 182-1358
  • Mfr. Part No. JM60100-3CR
Each
MYR1,355.83
ETA Thermal Circuit Breaker - 2 5700 Single Pole 250V Voltage Rating Panel Mount, 25A Current Rating
  • RS Stock No. 729-2776
  • Mfr. Part No. 2-5700-IG2-P10-DD-000040-25A
Each
MYR124.79
Littelfuse PC Board Non Resettable Fuse, Radial 100mA, 250V ac
  • RS Stock No. 895-1656
  • Mfr. Part No. 37201000431
Each (In a Pack of 10)
MYR5.225
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