ABB OTDC32US4 DC switch disconnector with 32 A operational current, 1000 V DC IEC rating and four-pole double circuit configuration for photovoltaic and industrial DC isolation.
The ABB OTDC32US4 (1SCA136704R1001) is a compact and highly reliable DC switch disconnector designed for photovoltaic (PV) installations and other demanding DC isolation applications. As part of the trusted ABB OTDC switch disconnector series, it provides safe and dependable isolation of DC circuits while supporting efficient installation in renewable energy and industrial electrical systems.
Designed with a robust four-pole double circuit configuration, the OTDC32US4 offers dependable performance for isolating photovoltaic strings and DC power systems. Its compact footprint allows installation on DIN rail or base mounting, while ABB's proven engineering ensures long service life and reliable operation in demanding environments.
With a 32 A rated operational current, a 1000 V DC IEC voltage rating and a 50 A conventional thermal current, the ABB OTDC32US4 is ideal for solar combiner boxes, PV string isolators, battery energy storage systems and industrial DC applications requiring safe circuit isolation.
DC switch disconnectors provide a safe means of isolating photovoltaic arrays and other direct current circuits for maintenance and emergency shutdown procedures. The ABB OTDC32US4 is engineered to deliver reliable switching performance while meeting recognised international standards for photovoltaic installations.
Its compact design, flexible mounting options and durable construction make it an excellent choice for solar installers, panel builders and electrical contractors requiring dependable DC isolation in renewable energy and industrial applications.
| Current | 50 A |
|---|---|
| Voltage | 000 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Manufacturer | ABB |
| Series | OTDC Switch Disconnectors |
| Model | OTDC32US4 |
| Manufacturer Part Number | 1SCA136704R1001 |
| Product type | DC switch disconnector |
| Rated operational current | 32 A |
| Rated thermal current (Iu) | 50 A |
| Rated voltage | 1000 V DC (IEC), 600 V DC (UL) |
| Number of poles | 4 |
| Configuration | Double circuit, US version |
| Mounting type | Base or DIN rail mounting |
| Connection type | Screw terminals |
| Protection rating | IP20 |
| Dimensions (H × W × D) | approx. 89 × 54.5 × 87 mm |
| Weight | approx. 0.15 kg |
| HS Code | 85365080 |
| Country of Manufacture | Estonia |
The OTDC32US4 is a DC switch disconnector designed to safely isolate photovoltaic arrays and other high-voltage DC electrical circuits.
The switch has a 32 A rated operational current and a 50 A conventional thermal current.
The OTDC32US4 is rated for 1000 V DC under IEC standards and 600 V DC under UL standards.
The switch can be installed using either base mounting or DIN rail mounting, providing flexibility for control panel and enclosure installations.
No. The operating handle and shaft are supplied separately and must be ordered independently to complete the installation.
ABB OTDC switch disconnectors are trusted worldwide by solar installers, panel builders and electrical engineers for delivering safe, reliable DC isolation in photovoltaic and industrial 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...