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

177 / 999+
Lovato ModuLo P1MB MCB, 4P, 32A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-5933
  • Mfr. Part No. P1MB4PB32
Each
MYR646.32
Better World
Siemens, 0AA0 MCCB 4P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 211-5971
  • Mfr. Part No. 3VA1110-4EF46-0AA0
Each
MYR3,261.15
Better World
ABB System Pro M Compact S200 MCB, 1P, 20A Curve K, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 514-0153
  • Mfr. Part No. 2CDS251001R0487 S201-K20
Each
MYR162.30
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 3 kA
  • RS Stock No. 245-214
  • Mfr. Part No. 3VA6225-6HN31-0AA0
Each
MYR11,352.46
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 189-5333
  • Mfr. Part No. P1062705 / CMC101
Each
MYR33.83
Hager Hager NEN Circuit Breaker, 1P, 16A Curve B, 230 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 599-898
  • Mfr. Part No. NEN116
Each
MYR264.66
Panasonic SMD Non Resettable Fuse 2A, 32V dc
  • RS Stock No. 759-4785
  • Mfr. Part No. ERBRE2R00V
Each (In a Pack of 10)
MYR1.284
Eaton 63A Rail Mount Fuse Holder for A3 Fuse, 1P, 690V ac
  • RS Stock No. 413-923
  • Mfr. Part No. RS63H
Each
MYR160.28
Littelfuse 0.2A Resettable Fuse, 72V
  • RS Stock No. 517-6584P
  • Mfr. Part No. RXEF020
Each (Supplied in a Bag)
MYR1.604
Better World
Siemens SENTRON 5SL4 MCB, 3P, 4A Curve B, 400V AC, 72V DC
  • RS Stock No. 209-7454
  • Mfr. Part No. 5SL4304-6
Each
MYR534.05
Eaton 100A NH Fuse, NH00, 690V
  • RS Stock No. 181-8772
  • Mfr. Part No. 100NHG00B-690
Each
MYR41.59
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 654-738
  • Mfr. Part No. A9DH3620
Each
MYR1,441.16
Allen Bradley 140G Cover Frame for use with MCCBs
  • RS Stock No. 255-1643
  • Mfr. Part No. 140G-G-RVM21B
Each
MYR668.51
Better World
ABB System Pro M Compact S200M MCB, 2P, 13A Curve B, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-100
  • Mfr. Part No. 2CDS272001R0135 S202M-B13
Each
MYR336.39
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 3+N, 6A Curve C, 400V AC
  • RS Stock No. 238-3376
  • Mfr. Part No. A9P24706
Each
MYR1,068.37
ETA Thermal Circuit Breaker - 2-5700 Single Pole 250V Voltage Rating Panel Mount, 25A Current Rating
  • RS Stock No. 406-9491
  • Mfr. Part No. 2-5700-IG1-P10-DD-000040-25A
Each
MYR159.27
RS PRO Earthing Strap Steel
  • RS Stock No. 122-080
1 Set
MYR12.98
SIBA 1.6A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 736-1425
  • Mfr. Part No. 70-172-40/1.6A
Each
MYR28.35
ABB System Pro M Compact S200M MCB, 1P, 63A Curve C, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4217
  • Mfr. Part No. 2CDS271001R0634 S201M-C63
Each
MYR172.00
Allen Bradley MCCB Molded Case Circuit Breaker 3P 160A
  • RS Stock No. 255-1649
  • Mfr. Part No. 140G-H2F3-D16
Each
MYR2,974.59
1
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