ABB OT125F3C 3-pole 125 A manual change-over switch for open transition transfer switching between low voltage power supplies in industrial panels and distribution systems.
£271.97
The ABB OT125F3C is a compact and reliable 3-pole manual change-over switch designed for safe transfer switching between two low voltage power sources. As part of the proven ABB OT Series, it provides dependable switching performance for industrial control panels, distribution boards, generator changeover systems and machinery applications.
This 125 A open transition change-over switch is engineered for applications where loads need to be manually transferred from one supply to another. Its robust non-fusible construction, compact design and flexible mounting options make it well suited to demanding industrial environments where reliability, safety and long service life are essential.
With a 125 A current rating, 3-pole configuration and suitability for low voltage transfer applications, the OT125F3C is ideal for standby supply selection, generator transfer panels and industrial distribution systems. The operating handle and shaft are supplied separately, allowing the installation to be configured to suit the enclosure depth and panel layout.
Change-over switches such as the ABB OT125F3C provide a dependable method of manually transferring a load between two power sources. This is commonly required where a main supply and an alternative supply, such as a generator or backup feed, must be selected safely and clearly.
The OT125F3C uses open transition operation, meaning the first supply is disconnected before the second supply is connected. This supports safe transfer switching in low voltage systems while helping protect equipment from unintended source overlap.
| Current | 125 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | OT Change-Over Switches |
| Model | OT125F3C |
| Product ID | 1SCA105037R1001 |
| EAN | 6417019391670 |
| Product type | Manual change-over switch / non-fusible transfer switch |
| Rated operational current | 125 A |
| Number of poles | 3 |
| Rated operational voltage | Up to 600 V AC |
| Transition type | Open transition |
| Operation | Manual front operation |
| Mounting type | DIN rail / panel mounting |
| Terminal type | Lugs / clamp terminals |
| Protection rating | IP20 |
| Standards | IEC 60947-3 / UL 98 |
| Handle and shaft | Not included |
| Suitable use | Change-over switching between two supplies |
| HS Code | 85365080 |
| Country of Manufacture | Finland |
The OT125F3C is used as a manual change-over switch to transfer a load between two low voltage power supplies, such as mains and standby power.
The ABB OT125F3C has a 3-pole configuration, making it suitable for three-phase change-over switching applications.
The OT125F3C has a rated operational current of 125 A.
Open transition means the first supply is disconnected before the second supply is connected, helping prevent the two sources from being connected at the same time.
No. The operating handle and shaft are not included and should be selected separately to suit the enclosure depth and installation requirements.
ABB OT Series change-over switches are widely used by electrical engineers, generator panel builders and industrial installers to provide reliable manual transfer switching, safe source selection and dependable performance in low voltage power 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...