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

308 / 999+
Temporarily out of stock
Eaton 200A Bolted Tag Fuse, 415V ac, 92mm
  • RS Stock No. 181-8608
  • Mfr. Part No. 200MJ31-7
Each (In a Box of 10)
MYR313.941
Temporarily out of stock
Better World
Schneider Electric Cable Connection Kit for use with Compact Nsx 100 To 630
  • RS Stock No. 221-1172
  • Mfr. Part No. LV429272
Each
MYR607.98
In Stock
Littelfuse 0.75A Resettable Fuse, 60V
  • RS Stock No. 712-7480
  • Mfr. Part No. RKEF075
Each (In a Pack of 10)
MYR1.733
Temporarily out of stock
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
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC 2 Pole 65V dc Voltage Rating DIN Rail, 4A Current Rating
  • RS Stock No. 135-505
  • Mfr. Part No. 0914840
1 Pack of 3
MYR2,479.61
In Stock
Better World
Siemens Sentron 5SY6 MCB, 3P, 16A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 489-6669
  • Mfr. Part No. 5SY6316-6
Each
MYR435.39
In Stock
ABB 24 → 36V ac/dc Undervoltage Release Circuit Trip for use with S800PV, S800S, S800N, S800C, S800B, S800HV,
  • RS Stock No. 435-425
  • Mfr. Part No. 2CCS800900R0241 S800-UVR36
Each
MYR471.67
In Stock
HENSEL ENYBOARD Distribution Board, 41 A
  • RS Stock No. 117-122
  • Mfr. Part No. RK 0610 T
Each
MYR198.29
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 101 A
  • RS Stock No. 117-682
  • Mfr. Part No. FC N 10
Each
MYR56.33
In Stock
Eaton 10A D01 Neozed Fuse, gG, 400V ac
  • RS Stock No. 181-8573
  • Mfr. Part No. 10NZ01
Each (In a Box of 10)
MYR11.553
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 220A, Fixed Mount
  • RS Stock No. 260-8008
  • Mfr. Part No. C25V36M220
Each
MYR20,465.00
Temporarily out of stock
Siemens SENTRON Trip Alarm Switch for use with Circuit Breaker 3VA27
  • RS Stock No. 265-593
  • Mfr. Part No. 3VW9727-0AB13
Each
MYR463.33
Temporarily out of stock
Schneider Electric, MasterPact Circuit Breaker Accessory
  • RS Stock No. 119-647
  • Mfr. Part No. LV833811
Each
MYR2,172.65
Temporarily out of stock
RS PRO 25A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8037
Each (In a Box of 500)
MYR1.714
In Stock
Eaton 35A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8633
  • Mfr. Part No. 35NHG000B
Each
MYR51.64
In Stock
Eaton 25A Centred Tag Fuse, NH01, 500V ac
  • RS Stock No. 703-8636
  • Mfr. Part No. 25NHG000B
Each
MYR30.02
In Stock
Eaton 6A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8611
  • Mfr. Part No. 6NHG000B
Each
MYR44.72
Temporarily out of stock
Eaton 6A Bolted Tag Fuse, 15 x 49mm, 240V ac, 35mm
  • RS Stock No. 181-8914
  • Mfr. Part No. LST6
Each
MYR39.34
Temporarily out of stock
ABB RCBO, 25A Current Rating, 4P Poles, Type C
  • RS Stock No. 237-5212
  • Mfr. Part No. 2CSR274101R1254
Each
MYR2,282.36
Unavailable
Schneider Electric ComPact Trip Unit for use with Compact NSX 160/250 circuit breakers
  • RS Stock No. 221-0982
  • Mfr. Part No. LV430496
Each
MYR9,267.99
1
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