ABB OTDC32UT4 DC switch disconnector with 32 A operational current, four-pole double circuit design and door mounting for photovoltaic and industrial DC isolation.
The ABB OTDC32UT4 (1SCA136705R1001) is a compact and highly reliable DC switch disconnector designed for photovoltaic (PV) systems and industrial DC power applications. As part of the trusted ABB OTDC switch disconnector range, it provides safe isolation of direct current circuits while delivering dependable performance in renewable energy installations and electrical control systems.
Featuring a 4-pole double circuit configuration with door mounting, the OTDC32UT4 is engineered for straightforward installation within PV combiner boxes and electrical enclosures. Its robust switching mechanism and compact design make it ideal for panel builders, OEMs and renewable energy installers requiring reliable DC isolation.
With a 32 A rated operational current, 50 A conventional thermal current and ratings up to 1000 V DC, the ABB OTDC32UT4 is suitable for photovoltaic arrays, battery storage systems, inverter installations and industrial DC distribution applications.
The ABB OTDC32UT4 provides safe isolation of photovoltaic strings and other DC electrical circuits during maintenance and emergency shutdown procedures. It is designed to meet the demanding requirements of renewable energy systems while ensuring dependable switching performance and long operational life.
Its compact door-mounted construction allows seamless integration into inverter cabinets, combiner boxes and industrial control panels where safe DC isolation is essential.
| Current | 50 A |
|---|---|
| Voltage | 000 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Manufacturer | ABB |
| Series | OTDC Switch Disconnectors |
| Model | OTDC32UT4 |
| Manufacturer Part Number | 1SCA136705R1001 |
| Product type | DC switch disconnector |
| Rated operational current | 32 A |
| Rated thermal current (Iu) | 50 A |
| Rated voltage | 600 V DC UL, 660 V DC IEC, 1000 V DC IEC (20 A) |
| Number of poles | 4 |
| Configuration | Double circuit |
| Mounting type | Door mounting |
| Connection type | Screw terminals |
| Protection rating | IP20 |
| Dimensions (H × W × D) | approx. 74 × 54.5 × 87 mm |
| Weight | approx. 0.18 kg |
| HS Code | 85365080 |
| Country of Manufacture | Estonia |
The OTDC32UT4 safely isolates direct current circuits in photovoltaic systems, battery storage installations and industrial DC applications.
The switch has a 32 A rated operational current and a 50 A conventional thermal current.
It is rated for 600 V DC UL, 660 V DC IEC and 1000 V DC IEC (20 A).
No. The operating handle and shaft must be ordered separately to complete the installation.
It is commonly installed in photovoltaic combiner boxes, inverter systems and industrial electrical enclosures requiring safe DC isolation.
ABB OTDC switch disconnectors are trusted worldwide by solar installers, electrical contractors and panel builders for providing safe and 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...