Fuses | Circuit Breakers | Circuit Safety | RS
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    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
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    Earth & Lightning Protection
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    Fuse Holders & Accessories
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    Fuses

    44703 Products showing for Fuses & Circuit Breakers

    1 / 999+
    ABB Emax2 Electronic Circuit Breaker 4kA Ekip Hi-Touch LSI, 3 channels
    • RS Stock No. 259-3332
    • Mfr. Part No. 1SDA071238R1
    Each
    MYR127,989.26
    Schneider Electric, ComPacT New generation MCCB 4P 100A, Breaking Capacity 440 V, Fixed Mount
    • RS Stock No. 205-204
    • Mfr. Part No. C16B47E100
    Each
    MYR29,984.44
    Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
    • RS Stock No. 260-8223
    • Mfr. Part No. C63N32D630
    Each
    MYR27,250.41
    Better World
    Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 3 channels
    • RS Stock No. 155-858
    • Mfr. Part No. 3VA2440-7JQ32-0AA0
    Each
    MYR23,149.13
    Eaton 250A Cartridge Fuse, 76 x 403mm
    • RS Stock No. 229-088
    • Mfr. Part No. 7.2WKNHO250
    1 Pack of 3
    MYR20,373.03
    Eaton 250A Tag Fuse, 76 x 254mm, 3.6kV
    • RS Stock No. 228-960
    • Mfr. Part No. 3.6WKFHO250
    1 Pack of 3
    MYR18,476.84
    Better World
    ABB, XT4L MCCB 4P 250A, Fixed Mount
    • RS Stock No. 236-6840
    • Mfr. Part No. 1SDA068590R1 XT4L 250 Ekip LSIG 250A FF
    Each
    MYR19,754.08
    Better World
    Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 3 channels
    • RS Stock No. 156-691
    • Mfr. Part No. 3VA2340-7JQ32-0AA0
    Each
    MYR19,616.99
    Better World
    ABB, XT4L MCCB 4P 63A, Fixed Mount
    • RS Stock No. 236-6837
    • Mfr. Part No. 1SDA068587R1 XT4L 160 Ekip LSIG 63A FF
    Each
    MYR17,415.19
    Better World
    Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 3 channels
    • RS Stock No. 156-742
    • Mfr. Part No. 3VA2340-5KQ32-0AA0
    Each
    MYR18,367.16
    Schneider Electric, NSX MCCB 4P 100A, Breaking Capacity 36 kA, Fixed Mount
    • RS Stock No. 219-8394
    • Mfr. Part No. LV433835
    Each
    MYR15,691.61
    Better World
    Siemens SENTRON Electronic Circuit Breaker 500A 3VA, 3 channels
    • RS Stock No. 155-833
    • Mfr. Part No. 3VA2440-0MS32-0AA0
    Each
    MYR16,302.22
    Schneider Electric, ComPacT NSX Circuit breaker 3P 160A, Breaking Capacity 50 KA, Fixed Mount
    • RS Stock No. 119-401
    • Mfr. Part No. C12B34V160B
    Each
    MYR13,586.18
    Schneider Electric, ComPacT NSX Circuit breaker 3P 100A, Breaking Capacity 16 KA, Fixed Mount
    • RS Stock No. 119-282
    • Mfr. Part No. C11E34V100B
    Each
    MYR10,595.32
    Better World
    ABB, XT4S MCCB 4P 160A, Fixed Mount
    • RS Stock No. 236-6779
    • Mfr. Part No. 1SDA068504R1 XT4S 160 Ekip LSI 160A FF
    Each
    MYR10,320.81
    Better World
    ABB, XT4L MCCB 3P 160A, Fixed Mount
    • RS Stock No. 236-6820
    • Mfr. Part No. 1SDA068569R1 XT4L 160 Ekip LSIG 160A FF
    Each
    MYR11,340.61
    Better World
    ABB, Tmax XT MCCB 4P 160A, Fixed Mount
    • RS Stock No. 236-6620
    • Mfr. Part No. 1SDA068156R1 XT4N 160 Ekip LSI 160A FF
    Each
    MYR10,139.83
    Better World
    ABB, XT4L MCCB 4P 160A, Fixed Mount
    • RS Stock No. 236-6824
    • Mfr. Part No. 1SDA068574R1 XT4L 160 Ekip LS/I 160A FF
    Each
    MYR8,551.31
    Better World
    ABB, Tmax XT MCCB 4P 10A, Fixed Mount
    • RS Stock No. 236-7556
    • Mfr. Part No. 1SDA067908R1 XT2H 160 Ekip LSIG 10A FF
    Each
    MYR9,369.63
    ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 800A, Fixed Mount
    • RS Stock No. 232-0136
    • Mfr. Part No. 1SDA060278R1 T6S800 FF PR221-LS/I 800A
    Each
    MYR10,101.65
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