ABB OT Switch Disconnectors

Switch disconnectors provide safe, visible isolation for maintenance. The ABB OT range covers panel- and door-mounted isolators across a wide current span, with the handles, extension shafts, auxiliary contacts and terminal shrouds needed to complete an installation, plus OTM motorised transfer switches for changeover between mains and generator supplies.

OT Switch Disconnectors & Transfer Switches we supply

• ABB OA1G01AU — Switch Disconnector Accessory
• ABB OA1G01 — Switch Disconnector Accessory
• ABB OA1G10AU — Switch Disconnector Accessory
• ABB OA1G10 — Switch Disconnector Accessory
• ABB OA1L11 — Switch Disconnector Accessory
• ABB OA2G11 — Switch Disconnector Accessory
• ABB OA2L11 — Switch Disconnector Accessory
• ABB OA3G01AU — Switch Disconnector Accessory
• ABB OA3G01 — Switch Disconnector Accessory
• ABB OA3L11 — Switch Disconnector Accessory
• ABB OA8G01 — Switch Disconnector Accessory
• ABB OEZNP4 — Switch Disconnector Accessory
• ABB OHB125J12E20 — Switch Disconnector Accessory
• ABB OHB125J12 — Switch Disconnector Accessory
• ABB OHB125J12T — Switch Disconnector Accessory
• ABB OHB145J12E00S — Switch Disconnector Accessory
• ABB OHB145J12 — Switch Disconnector Accessory
• ABB OHB150J12PE20 — Switch Disconnector Accessory
• ABB OHB150J12P — Switch Disconnector Accessory
• ABB OHB200J12PE20 — Switch Disconnector Accessory
• ABB OHB200J12P — Switch Disconnector Accessory
• ABB OHB200J12PT — Switch Disconnector Accessory
• ABB OHB200L12P — Switch Disconnector Accessory
• ABB OHB274J12PE20 — Switch Disconnector Accessory
• ABB OHB274J12 — Switch Disconnector Accessory
• ABB OHB274J12T — Switch Disconnector Accessory
• ABB OHB330J12 — Switch Disconnector Accessory
• ABB OHB330J12T — Switch Disconnector Accessory
• ABB OHB45J6 — Switch Disconnector Accessory
• ABB OHB65J6E00S — Switch Disconnector Accessory
• ABB OHB65J6E20 — Switch Disconnector Accessory
• ABB OHB65J6 — Switch Disconnector Accessory
• ABB OHB65J6TE00S — Switch Disconnector Accessory
• ABB OHB65J6T — Switch Disconnector Accessory
• ABB OHB80J6 — Switch Disconnector Accessory
• ABB OHB95J12E20 — Switch Disconnector Accessory
• ABB OHB95J12 — Switch Disconnector Accessory
• ABB OHB95J12T — Switch Disconnector Accessory
• ABB OHB-G1M — Switch Disconnector Accessory
• ABB OHB-G1 — Switch Disconnector Accessory
• ABB OHB-G3M — Switch Disconnector Accessory
• ABB OHB-G3 — Switch Disconnector Accessory
• ABB OHBS11 — Switch Disconnector Accessory
• ABB OHBS12 — Switch Disconnector Accessory
• ABB OHBS13 — Switch Disconnector Accessory
• ABB OHBS14 — Switch Disconnector Accessory
• ABB OHBS16 — Switch Disconnector Accessory
• ABB OHBS1AH1 — Switch Disconnector Accessory

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What to check before ordering

• The switch body, the handle and the shaft are usually three separate part numbers — a body alone cannot be operated.
• Confirm door-mounted vs base-mounted operation and the required handle colour (black for isolation, red/yellow for emergency switching).
• Check the utilisation category (AC-21, AC-22, AC-23) against the load being switched.
• For transfer switches, confirm whether control is manual, motorised or fully automatic.

Frequently asked questions

Why did my OT switch arrive without a handle?

Because the handle and the operating shaft are separate references on most OT models — the same switch body serves door-mounted and direct-mounted arrangements.

What is the difference between AC-21 and AC-23 duty?

It is the switching duty the device is rated for. AC-21 is resistive-load switching, AC-22 is mixed resistive/inductive, and AC-23 covers motor loads. Isolating a motor circuit under load needs an AC-23 rated switch.

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