ABB OTC100G3-4BS four-pole 100 A manual change-over switch with I-0-II operation, integrated screw terminals, DIN-rail mounting capability and a padlockable direct-mounted handle.
The ABB OTC100G3-4BS, product code 1SCA162748R1001, is a robust four-pole manual change-over switch designed for dependable transfer between two independent electrical power sources. As part of the advanced ABB OT Plus change-over switch series, it provides reliable source selection for industrial distribution systems, standby power installations and electrical control panels.
This front-operated change-over switch features a compact base-mounted design that is also suitable for DIN-rail installation. Its integrated screw terminals simplify wiring, while the supplied direct-mounted knob handle can be padlocked to help prevent accidental or unauthorised operation during maintenance and isolation procedures.
With a rated current of 100 A and a four-pole configuration, the OTC100G3-4BS can switch three phase conductors together with the neutral conductor. Its I-0-II operating arrangement provides a central OFF position, making it suitable for mains-to-generator transfer, alternative supply selection and other applications requiring controlled manual power switching.
Manual change-over switches provide a controlled method of selecting between two separate electrical supplies. The centre OFF position allows the connected load to be isolated before the alternative source is selected, helping prevent unintended connection between the two supplies.
The four-pole ABB OTC100G3-4BS switches the neutral conductor together with all three phases. This makes it particularly suitable for generator change-over panels and installations where the electrical design requires complete separation of both live and neutral conductors.
| Manufacturer | ABB |
|---|---|
| Series | OT Plus Change-Over Switches |
| Model | OTC100G3-4BS |
| Product ID | 1SCA162748R1001 |
| Product type | Manual change-over switch |
| Rated current | 100 A |
| Number of poles | 4 |
| Operating positions | I-0-II |
| Operation | Front operated |
| Mounting type | Base mounting / DIN-rail mounting |
| Frame size | G3 |
| Terminal type | Integrated screw terminals |
| Handle type | Direct-mounted knob handle |
| Handle security | Padlockable |
| External operation | Shaft can be fitted for door operation |
| Application | Manual power-source transfer and isolation |
| HS Code | 85365080 |
| Country of Manufacture | Finland |
The switch is used to manually transfer an electrical load between two independent power sources, such as a mains supply and a standby generator.
The ABB OTC100G3-4BS has a rated current of 100 A.
Its four-pole configuration allows all three phase conductors and the neutral conductor to be switched together, supporting complete source separation where required.
Yes. The supplied direct-mounted knob handle can be padlocked to help prevent unauthorised operation and support safer electrical isolation.
Yes. A shaft can be fitted to the switch for external operation through the door of a suitable electrical enclosure or switchboard.
ABB OT Plus change-over switches provide dependable manual source selection, flexible installation and secure isolation for industrial, commercial and infrastructure power-distribution systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...