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 Number of Poles Range Series Throw Configuration Mechanical Fuse Size Fuse Current Rating Auxiliary Contacts Available Maximum Current Electrical Phase Terminal Type Mounting Type Minimum Operating Temperature Maximum Operating Temperature
RS Stock No. 518-7130
Mfr. Part No.3LD2250-0TK13
BrandSiemens
$55.52
Each
units
- - - - - - 10A - 32 A - - Panel Mount - -
RS Stock No. 398-5235
Mfr. Part No.AAE003-251/Z038
BrandEICHOFF
$14.61
Each
units
- - - - - - - - - - - Panel Mount - -
RS Stock No. 443-845
Mfr. Part No.DTL250KIT
$308.47
Each
units
- 3P - - - NH - - 250 A 3 - Surface Mount - -
RS Stock No. 535-0912
Mfr. Part No.MGFA0633C
$539.87
Each
units
- 3P + N - - - A2, A3, BA063 - - 63 A - - - - -
RS Stock No. 443-839
Mfr. Part No.DTL160KIT
$207.38
Each
units
- 3P - - - C00/00, NH 160A - 160 A 3 - Surface Mount - -
RS Stock No. 710-0576
Mfr. Part No.1SCA114610R1001
BrandABB
$214.28
Each
units
- 4P - - - A2, A3 - Yes 32 A 3 Screw DIN Rail - -
RS Stock No. 762-2641
Mfr. Part No.1SCA022719R0250
BrandABB
$1,021.29
Each
units
- 3P - - - 0 → 2 500A Yes 400 A 3 - DIN Rail - -
RS Stock No. 762-2648
Mfr. Part No.1SCA022825R2830
BrandABB
$1,626.84
Each
units
- 3P - - - 3 800A Yes 630 A 3 - DIN Rail - -
RS Stock No. 238-4833
Mfr. Part No.0 058 22
BrandLegrand
$26.63
Each
units
- SP + N - - - 8.5 x 31.5 mm - - 20 A 1 Cage DIN rail -5°C +40°C
RS Stock No. 534-5112
Mfr. Part No.MGFA0201C
$186.66
Each
units
- SP + N - - - A1, A2, NITD20 - - 20 A - - - - -
RS Stock No. 676-3233
Mfr. Part No.GS2S3
$4,604.62
Each
units
- 3P - - - 3 - - 400 A dc, 630 A ac 3 - DIN rail -20°C +70°C
RS Stock No. 628-8098
Mfr. Part No.PN2-200
BrandEaton
$483.59
1 Box of 1
Box(es)
- 3P - PN2 - - 200A - 250 A - Screw Panel Mount - -
RS Stock No. 247-4065
Mfr. Part No.DTL400KIT
$638.75
Each
units
- 3P - - - NH02 - - 400 A 3 - Surface Mount - -
RS Stock No. 608-7558
Mfr. Part No.GK1ES
$177.97
Each
units
- 3P - - - 14 x 51 mm - Yes 50 A - Wire Lead DIN Rail -50°C +70°C
New
RS Stock No. 184-9103
Mfr. Part No.DD041MS
BrandContactum
$135.50
Each
units
- - - - - - - - 100 A - - - - -
RS Stock No. 608-7930
Mfr. Part No.GS1DD3
$252.75
Each
units
- 3P - - - 10 x 38 mm - - 20 A dc, 32 A ac 3 Screw DIN Rail - -
RS Stock No. 781-3787
Mfr. Part No.3631 4002
BrandSocomec
$154.16
Each
units
- 3P + N - - - 10 x 38 mm - Yes 25 A - Shroud DIN Rail - -
RS Stock No. 708-1744
Mfr. Part No.GS2GB3
$176.82
Each
units
- 3P - - - A2, A3 - Yes 40 A dc, 63 A ac 3 Wire Lead DIN Rail -20°C +70°C
RS Stock No. 781-3907
Mfr. Part No.3841 6039
BrandSocomec
$1,507.21
Each
units
- 4P - - - B1, B2, B3, B4 - Yes 400 A - Shroud DIN Rail - -
RS Stock No. 781-3796
Mfr. Part No.3631 5002
BrandSocomec
$144.25
Each
units
- 3P + N - - - 10 x 38 mm - Yes 25 A - Shroud DIN Rail - -
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