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. 781-3907
Mfr. Part No.3841 6039
BrandSocomec
SGD1,199.35
Each
units
- - 4P - - - - B1, B2, B3, B4 - Yes 400 A - Shroud DIN Rail
RS Stock No. 512-9471
Mfr. Part No.OS125B12
BrandABB
SGD489.75
Each
units
- - 3P - - - - A2, A3, A4 - Yes 125 A - Screw DIN Rail
RS Stock No. 443-845
Mfr. Part No.DTL250KIT
SGD301.15
Each
units
- - 3P - - - - NH - - 250 A 3 - Surface Mount
RS Stock No. 727-5807
Mfr. Part No.1SCA022750R6660
BrandABB
SGD879.91
Each
units
- - 3P - - - - B1-B3 - Yes 250 A 3 Screw DIN Rail
RS Stock No. 726-4911
Mfr. Part No.63GNC
BrandEaton
SGD923.09
Each
units
- - 3P + N - - - - SB3, SB4 - - 63 A 3 Tunnel -
RS Stock No. 710-0570
Mfr. Part No.1SCA115235R1001
BrandABB
SGD278.06
Each
units
- - 3P - - - - A2, A3 - Yes 63 A 3 Screw DIN Rail
New
RS Stock No. 203-9643
Mfr. Part No.5SG7113
BrandSiemens
SGD61.81
Each
units
- Fused 1 MINIZED Minized - - D02 63A - 63 A - - -
RS Stock No. 815-3691
Mfr. Part No.GS1DDU3
SGD340.78
Each
units
- - 3 - - - - CC - - 30 A - - DIN Rail
RS Stock No. 513-5713
Mfr. Part No.3841 3016
BrandSocomec
SGD324.03
Each
units
- - 3P - - - - - 10A - 160 A 3 - -
New
RS Stock No. 203-9645
Mfr. Part No.5SG7163
BrandSiemens
SGD161.21
Each
units
- Fused 4 MINIZED Minized - - D02 63A - 63 A - - -
RS Stock No. 608-7558
Mfr. Part No.GK1ES
SGD211.46
Each
units
- - 3P - - - - 14 x 51 mm - Yes 50 A - Wire Lead DIN Rail
New
RS Stock No. 204-1585
Mfr. Part No.T0-2-8900/SE1/SVB
BrandEaton
SGD251.48
Each
units
4 NO Fused 3Poles + N Main Switch, Maintenance Switch, Switch Disconnector T0 - Enclosed - 20A - 6 kA - - -
RS Stock No. 726-4740
Mfr. Part No.104GC
BrandEaton
SGD1,339.21
Each
units
- - 3P + N - - - - SB3, SB4, SD5, SO - - 100 A 3 Tunnel -
RS Stock No. 762-2622
Mfr. Part No.1SCA115882R1001
BrandABB
SGD697.04
Each
units
- - 4P - - - - 000, 00 160A Yes 160 A 3 - DIN Rail
RS Stock No. 710-0573
Mfr. Part No.1SCA115259R1001
BrandABB
SGD174.22
Each
units
- - 3P - - - - A2, A3 - Yes 32 A 3 Screw DIN Rail
RS Stock No. 708-1750
Mfr. Part No.GS2JB4
SGD380.74
Each
units
- - 4P - - - - A4 - Yes 100 A dc, 100 A ac 3 Wire Lead DIN Rail
RS Stock No. 762-2648
Mfr. Part No.1SCA022825R2830
BrandABB
SGD2,062.01
Each
units
- - 3P - - - - 3 800A Yes 630 A 3 - DIN Rail
New
RS Stock No. 202-7126
Mfr. Part No.5SG7611-0KK16
BrandSiemens
SGD26.268
Each (In a Pack of 12)
units
- Fused 1 MINIZED 5SG7611 - - D01 16A - 16 A - - -
RS Stock No. 710-0592
Mfr. Part No.1SCA115413R1001
BrandABB
SGD505.26
Each
units
- - 3P - - - - A2, A3, A4 - Yes 160 A 3 - DIN Rail
RS Stock No. 534-5178
Mfr. Part No.MGFA1003C
SGD905.28
Each
units
- - 3P + N - - - - A2, A3, A4, CEO100 - - 100 A - - -
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