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

255 / 999+
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 690 V ac → 1kV ac/dc
  • RS Stock No. 189-5339
  • Mfr. Part No. D1062718 / CUS102
Each
MYR123.10
In Stock
Murrelektronik Limited Electronic Circuit Breaker
  • RS Stock No. 123-6689
  • Mfr. Part No. 9000-41034-0100600
Each
MYR1,420.81
Temporarily out of stock
ABB F200 RCCB, 100A, 2 Pole, 30mA, Type A, 277V ac
  • RS Stock No. 177-5055
  • Mfr. Part No. 2CSF202401R1900 F202 A-100/0,03 AP-R
Each
MYR1,720.17
In Stock
Better World
Schneider Electric Acti 9 A9N1 MCB, 2P, 80A Curve B
  • RS Stock No. 221-0880
  • Mfr. Part No. A9N18413
Each
MYR1,665.61
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 16A Curve D, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9664
  • Mfr. Part No. A9F75216
Each
MYR648.72
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 150A, Fixed Mount
  • RS Stock No. 260-7886
  • Mfr. Part No. C25F3MA150
Each
MYR6,622.95
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 4P, 20A Curve K, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 204-291
  • Mfr. Part No. 2CDS384001R0487
Each
MYR2,585.13
In Stock
Schneider Electric Distribution Block for use with Compact, Kaedra, Pragma, Prisma-G, Prisma-P, Prisma-Pack, Prisma-PH,
  • RS Stock No. 822-7953
  • Mfr. Part No. LGY412548
Each
MYR302.91
Temporarily out of stock
Eaton 100A Fuse Holder for 126 x 62 x 36mm Fuse, 1P, 690V
  • RS Stock No. 263-152
  • Mfr. Part No. CM100FW
1 Pack of 5
MYR1,766.08
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-322
  • Mfr. Part No. 3VA6460-7HN31-0AA0
Each
MYR22,270.38
In Stock
ABB RCBO, 32A Current Rating, 3P Poles, Type B
  • RS Stock No. 237-5069
  • Mfr. Part No. 2CSR253001R1325
Each
MYR1,714.15
In Stock
Littelfuse 6.25A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0114
  • Mfr. Part No. 03136.25HXP
Each (In a Pack of 5)
MYR5.326
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-138
  • Mfr. Part No. KV 8448 M
Each
MYR1,280.94
In Stock
ABB System Pro M Compact S200M MCB, 1P, 6A Curve B, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-5973
  • Mfr. Part No. 2CDS271001R0065 S201M-B6
Each
MYR127.76
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
Siemens 200A Bolted Tag Fuse, NH000, 690V
  • RS Stock No. 210-6983
  • Mfr. Part No. 3NE8725-1
Each (In a Pack of 10)
MYR297.447
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
HENSEL ENYBOARD Distribution Board, 101 A
  • RS Stock No. 117-682
  • Mfr. Part No. FC N 10
Each
MYR56.33
In Stock
Better World
Schneider Electric Shunt trip for use with Multi 9 C60 C60BP, Multi 9 C60 C60BPR, Multi 9 C60 C60SP, Multi 9 C60H-DC,
  • RS Stock No. 220-1341
  • Mfr. Part No. M9A26946
Each
MYR652.23
In Stock
Schurter PC Board Non Resettable Fuse, Radial 40mA, 250V ac
  • RS Stock No. 866-8402
  • Mfr. Part No. 0034.6000
Each (In a Pack of 100)
MYR3.416
1
255
2329
Results per page

Related links