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

119 / 999+
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 25A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-295
  • Mfr. Part No. 3VA5125-4EC31-0AA0
Each
MYR1,990.24
In Stock
Siemens 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 3P, 690V ac
  • RS Stock No. 396-005
  • Mfr. Part No. 3NC1493
Each (In a Pack of 2)
MYR1,091.29
Limited stock
Limitor Thermal Fuse +130°C 2.5 A, 250V ac
  • RS Stock No. 204-7477
  • Mfr. Part No. Q82 A 130 05 100
Each
MYR31.21
Temporarily out of stock
ABB S800C MCB, 2P, 32A Curve C, 240V AC, 25 kA Breaking Capacity
  • RS Stock No. 140-941
  • Mfr. Part No. 2CCS882001R0324
Each
MYR523.58
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 16A Curve D, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3473
  • Mfr. Part No. A9F55116
Each
MYR262.95
In Stock
Schurter 50mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7601
  • Mfr. Part No. 0034.1529
Each (In a Pack of 10)
MYR9.681
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 232-0091
  • Mfr. Part No. 1SDA054405R1 T5S630 FF PR221-I 630A
Each
MYR13,438.41
In Stock
ABB 12 Way Plastic Consumer Unit, 63A, IP65 Mistral65
  • RS Stock No. 183-3758
  • Mfr. Part No. 1SLM006500A2212
Each
MYR228.65
In Stock
Better World
Siemens SENTRON 5SL4 MCB, 1P, 10A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6453
  • Mfr. Part No. 5SL4110-8
Each
MYR167.94
Temporarily out of stock
Siemens SENTRON 1 Phase Busbar, 27mm Pitch
  • RS Stock No. 202-7113
  • Mfr. Part No. 5ST3714
Each
MYR771.80
In Stock
Eaton 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1638
  • Mfr. Part No. S506-250-R
Each (In a Pack of 10)
MYR2.587
In Stock
ABB Tmax T Shunt Opening Release for use with MCCB
  • RS Stock No. 232-0105
  • Mfr. Part No. 1SDA054863R1 24VAC/DC T4-6
Each
MYR815.23
In Stock
Littelfuse Non-Resettable Wire Ended Fuse 5A, 125V ac/dc
  • RS Stock No. 738-3009
  • Mfr. Part No. 0473005.MRT1L
Each (In a Pack of 10)
MYR8.153
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3521
  • Mfr. Part No. A9F55216
Each
MYR419.73
In Stock
Better World
Schneider Electric Acti 9 Rotary Handle for use with iC60 MCB, iDPN Vigi, ilD MCB, iSW-NA
  • RS Stock No. 791-3032
  • Mfr. Part No. A9A27006
Each
MYR535.56
In Stock
Better World
ABB Compact Home SH200 MCB, 3P, 32A Curve B, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 539-8318
  • Mfr. Part No. 2CDS213001R0325 SH203-B32
Each
MYR322.70
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 63A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9270
  • Mfr. Part No. A9F77363
Each
MYR2,352.23
In Stock
Siemens Sentron Copper Rod for use with Busbar
  • RS Stock No. 228-8264
  • Mfr. Part No. 8WC5126
Each
MYR505.30
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 1P, 16A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 191-6121
  • Mfr. Part No. A9P34616
Each
MYR694.31
In Stock
Eaton 2A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1436
  • Mfr. Part No. S501-2-R
Each (In a Pack of 10)
MYR1.635
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