ABB OTHV125G04 4-pole 125A switch disconnector for 800 to 1000 V AC industrial electrical isolation and power distribution applications.
The ABB OTHV125G04 (1SCA162938R1001) is a heavy-duty 4-pole switch disconnector designed to provide safe and reliable manual isolation in industrial electrical installations. Engineered for operation on 800 to 1000 V AC systems, it is ideally suited to switchboards, renewable energy applications and industrial power distribution where dependable circuit isolation is essential.
As part of ABB's proven OTHV switch disconnector series, the OTHV125G04 combines robust construction with excellent switching performance and long mechanical life. Its front-operated, base-mounted design allows straightforward installation in control panels and distribution equipment. The operating handle and shaft are supplied separately, allowing flexibility when configuring installations.
With a 125 A conventional thermal current, four-pole switching capability and durable screw terminal connections, the OTHV125G04 provides dependable electrical isolation for commercial and industrial applications where safety and reliability are critical.
The ABB OTHV125G04 is designed to safely disconnect electrical circuits during maintenance and servicing, helping protect personnel and equipment. Its four-pole configuration enables complete isolation of multi-phase electrical systems where switching of all conductors is required.
Built for demanding industrial environments, the OTHV series delivers dependable performance, long service life and straightforward installation, making it a preferred solution for OEM machine builders, panel manufacturers and electrical contractors.
| Current | 125 A |
|---|---|
| Voltage | 800 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Manufacturer | ABB |
| Series | OTHV |
| Model | OTHV125G04 |
| Manufacturer Part Number | 1SCA162938R1001 |
| Product type | Switch disconnector |
| Number of poles | 4 |
| Rated operational voltage | 800 to 1000 V AC |
| Conventional thermal current (Ith) | 125 A |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Protection rating | IP20 |
| Connection type | Screw terminals |
| Mounting type | Base mounting |
| Operation | Front operated |
| Handle supplied | No (ordered separately) |
| HS Code | 85365080 |
| Country of Manufacture | Finland |
It provides safe manual isolation of electrical circuits in industrial and commercial power distribution systems.
The OTHV125G04 features a 4-pole switching configuration.
It is suitable for applications operating between 800 and 1000 V AC.
No. The operating handle and shaft are supplied separately to allow flexible installation configurations.
It is commonly installed in industrial switchboards, distribution panels and renewable energy systems requiring reliable manual isolation.
ABB OTHV switch disconnectors are trusted by electrical engineers, OEM manufacturers and panel builders for reliable isolation, long service life and dependable performance in demanding industrial applications.
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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...