Isolator & Switch Disconnectors

Fused switch disconnectors are devices used to ensure that a circuit is completely powered down in order for it to be serviced or maintained. They isolate a given part of the circuit by cutting off its electrical supply, making it safe for service or maintenance.

Fused switch disconnectors contain multiple fuses inside the same enclosure, so that it is easy to select and isolate a particular part of the circuit. For example an isolator switch can be used in a substation to physically disconnect any circuit when repairs are being carried out.

What are fused switch disconnectors used for?

Fused switch disconnectors protect workers performing maintenance on part of an electrical circuit, as well as preventing damage to the circuit itself. The advantage of using a fused switch disconnector over a non-fused switch disconnector one is that it can provide a higher level of safety compared with unfused disconnectors, as the fuse blows in the event of breaches such as short circuits or overcurrent. This makes it certain that that part of the circuit cannot have current flowing through it while being worked on.

Types of fused switch disconnectors

Fused switch disconnectors mainly differ depending on the type of fuses they house, the number of poles they have, and the terminal type.

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Description Price Normal State Configuration Fused/Non-Fused Number of Poles Range Series Throw Configuration Enclosed/Not Enclosed Mechanical Fuse Size Fuse Current Rating Auxiliary Contacts Available Maximum Current Electrical Phase Terminal Type Mounting Type
RS Stock No. 781-3894
Mfr. Part No.3841 3032
BrandSocomec
$939.81
Each
units
- - 3P - - - - B1, B2, B3 - Yes 315 A - Shroud DIN Rail
RS Stock No. 781-3806
Mfr. Part No.3631 3004
BrandSocomec
$182.67
Each
units
- - 3P - - - - 14 x 51 mm - Yes 32 A - Shroud DIN Rail
RS Stock No. 179-9657
Mfr. Part No.57025014
BrandSocomec
$126.15
Each
units
3P+N - 3 RMS - - - 14 x 51 mm 50A Yes 50 A - - -
RS Stock No. 182-8454
Mfr. Part No.36153024
BrandSocomec
$2,155.26
Each
units
- - - - - - - - - - - - - -
RS Stock No. 781-3884
Mfr. Part No.3841 6010
BrandSocomec
$419.77
Each
units
- - 4P - - - - A4 - Yes 100 A - Shroud DIN Rail
RS Stock No. 781-3822
Mfr. Part No.3831 3010
BrandSocomec
$329.58
Each
units
- - 3P - - - - 22 x 58 mm - Yes 100 A - Shroud DIN Rail
RS Stock No. 781-3897
Mfr. Part No.38416021
BrandSocomec
$639.71
Each
units
- - 4P - - - - B1, B2 - Yes 200 A - Shroud DIN Rail
RS Stock No. 781-3878
Mfr. Part No.3641 4001
BrandSocomec
$162.50
Each
units
- - 3P + N - - - - A1 - Yes 32 A - Shroud DIN Rail
RS Stock No. 781-3825
Mfr. Part No.3831 3006
BrandSocomec
$216.37
Each
units
- - 3P - - - - 00C - Yes 63 A - Shroud DIN Rail
RS Stock No. 781-3847
Mfr. Part No.3831 3012
BrandSocomec
$471.39
Each
units
- - 3P - - - - 00 - Yes 125 A - Shroud DIN Rail
RS Stock No. 781-3856
Mfr. Part No.3831 3024
BrandSocomec
$897.70
Each
units
- - 3P - - - - 1 mm - Yes 250 A - Shroud DIN Rail
RS Stock No. 179-9648
Mfr. Part No.38313016
BrandSocomec
$778.44
Each
units
3P - 3 FUSERBLOC - - - - 160A Yes 160 A - - DIN Rail
RS Stock No. 179-9647
Mfr. Part No.36153010
BrandSocomec
$451.98
Each
units
3P - 3 FUSERBLOC - - - 22 x 58 mm 100A Yes 100 A - - DIN Rail
RS Stock No. 781-3840
Mfr. Part No.3831 6012
BrandSocomec
$609.19
Each
units
- - 4P - - - - 00 - Yes 125 A - Shroud DIN Rail
RS Stock No. 781-3907
Mfr. Part No.3841 6039
BrandSocomec
$1,352.19
Each
units
- - 4P - - - - B1, B2, B3, B4 - Yes 400 A - Shroud DIN Rail
RS Stock No. 172-3018
Mfr. Part No.36153016
BrandSocomec
$559.88
Each
units
2NO/2NC, NO/NC - 3 FUSERBLOC - - - 00 160A Yes 160 A 3 Cage DIN Rail
RS Stock No. 781-3812
Mfr. Part No.3831 3005
BrandSocomec
$212.24
Each
units
- - 3P - - - - 14 x 51 mm - Yes 50 A - Shroud DIN Rail
RS Stock No. 513-5729
Mfr. Part No.3841 3021
BrandSocomec
$575.30
Each
units
- - 3P - - - - B1-B2 200A - 200 A 3 - -
RS Stock No. 781-3816
Mfr. Part No.3831 6005
BrandSocomec
$257.49
Each
units
- - 4P - - - - 14 x 51 mm - Yes 50 A - Shroud DIN Rail
RS Stock No. 513-5735
Mfr. Part No.3841 3024
BrandSocomec
$848.81
Each
units
- - 3P - - - - - 10A - 250 A 3 - -