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

314 / 999+
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 60A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-454
  • Mfr. Part No. 3VA5160-6ED41-0AA0
Each
MYR2,740.04
Temporarily out of stock
Better World
Schneider Electric Acti 9 C120H MCB, 4P, 63A Curve D, 440V AC, 500V DC, 15 kA, 30 kA Breaking Capacity
  • RS Stock No. 776-3045
  • Mfr. Part No. A9N18522
Each
MYR2,816.99
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 3+N, 32A Curve C
  • RS Stock No. 216-4326
  • Mfr. Part No. 5SL6432-7
Each
MYR824.73
In Stock
Siemens 160A NH Fuse, NH2, 500V ac
  • RS Stock No. 395-541
  • Mfr. Part No. 3NA3236
Each (In a Pack of 3)
MYR125.70
Temporarily out of stock
4A NH Fuse, 51 x 21 x 79mm, 400V ac
  • RS Stock No. 262-761
  • Mfr. Part No. 4NHG000B-400
1 Pack of 3
MYR73.12
In Stock
ABB System Pro M Compact SD200 MCB, 4P, 63A, 440V AC, 25 kA Breaking Capacity
  • RS Stock No. 189-5650
  • Mfr. Part No. 2CDD284101R0063
Each
MYR566.54
In Stock
RS PRO 30A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V dc
  • RS Stock No. 284-6488
Each (In a Pack of 5)
MYR14.152
In Stock
Better World
Siemens Sentron 5SY4 MCB, 3P, 25A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2096
  • Mfr. Part No. 5SY4325-6
Each
MYR680.04
Temporarily out of stock
Siemens 10A D01 Neozed Fuse, gR, 400V
  • RS Stock No. 202-7052
  • Mfr. Part No. 5SE1310
Each (In a Pack of 10)
MYR76.404
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 16A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7798
  • Mfr. Part No. LV426550
Each
MYR2,580.37
In Stock
Littelfuse 7.5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 787-4237
  • Mfr. Part No. 029707.5L
Each (In a Pack of 5)
MYR2.712
In Stock
Bourns SMD Non Resettable Fuse 500mA, 24V dc
  • RS Stock No. 692-4959P
  • Mfr. Part No. SF-0402F050-2
Each (Supplied on a Reel)
MYR2.175
In Stock
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 272-0189
  • Mfr. Part No. 3VA1580-6EF42-0AA0
Each
MYR19,939.43
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1693
  • Mfr. Part No. 3VA1225-5EF42-0AA0
Each
MYR6,597.06
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 4P 250A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 211-6044
  • Mfr. Part No. 3VA1225-4GF42-0AA0
Each
MYR5,993.50
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 200mA, 125V ac/dc
  • RS Stock No. 878-1271
  • Mfr. Part No. 0273.200V
Each
MYR61.15
In Stock
RS PRO 25A Cartridge Fuse, 13 x 29mm
  • RS Stock No. 413-844
Each (In a Pack of 10)
MYR25.331
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 50A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7618
  • Mfr. Part No. 2CDS253001R0505 S203-B50
Each
MYR420.11
In Stock
Better World
Siemens SENTRON 5SY6 MCB, 1P, 2A Curve B, 230 V, 440 V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 203-2183
  • Mfr. Part No. 5SY6102-6
Each
MYR119.19
Limited stock
Better World
Siemens Sentron 5SY6 MCB, 1P, 1A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 521-4917
  • Mfr. Part No. 5SY6101-7
Each
MYR125.15
1
314
2329
Results per page

Related links