ABB OTDC16U4 4-pole DC switch disconnector rated at 16 A for 660 V DC and 10 A for 1000 V DC, designed for photovoltaic, battery storage and industrial DC isolation applications.
The ABB OTDC16U4 (1SCA134370R1001) is a compact and dependable DC switch disconnector designed to provide safe isolation for photovoltaic (PV), battery storage and industrial direct current applications. As part of the trusted ABB OTDC switch disconnector series, it delivers reliable switching performance while helping ensure safe maintenance and operation of DC electrical systems.
Designed for demanding renewable energy and industrial environments, the OTDC16U4 combines robust construction with a compact footprint, making it ideal for panel builders, OEMs and electrical contractors. Its four-pole, dual-circuit configuration offers flexible installation in DC combiner boxes, battery storage systems and industrial control panels.
With a 16 A operational rating at 660 V DC and 10 A at 1000 V DC, the ABB OTDC16U4 is suitable for dual-circuit DC isolation in photovoltaic arrays, energy storage systems and industrial DC power distribution. The switch is supplied with a terminal bolt kit, while the operating handle and shaft are ordered separately to suit the installation.
DC switch disconnectors provide a safe means of isolating direct current circuits during maintenance, inspection and servicing. The ABB OTDC range has been developed specifically for photovoltaic systems, battery energy storage systems and industrial DC installations where dependable isolation and long service life are essential.
The OTDC16U4 combines ABB's proven engineering with a durable compact design, providing reliable switching performance and straightforward installation in modern renewable energy and industrial applications.
| Current | 32 A |
|---|---|
| Voltage | 000 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Manufacturer | ABB |
| Series | OTDC Switch Disconnectors |
| Model | OTDC16U4 |
| MPN | 1SCA134370R1001 |
| Product type | DC switch disconnector |
| Rated operational current | 10 A at 1000 V DC |
| UL rating | 16 A at 600 V DC |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 8 kV |
| Number of poles | 4 |
| Number of circuits | 2 |
| Mounting type | Base or DIN rail mounting |
| 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 OTDC16U4 is a DC switch disconnector used to safely isolate direct current circuits in photovoltaic, battery storage and industrial DC applications.
The switch is rated at 16 A at 660 V DC, 10 A at 1000 V DC and 16 A at 600 V DC under UL standards.
The ABB OTDC16U4 features a 4-pole dual-circuit configuration for flexible DC switching applications.
No. The terminal bolt kit is supplied, while the operating handle and shaft are ordered separately to match the installation requirements.
It is commonly installed in photovoltaic systems, battery storage equipment, DC combiner boxes and industrial control panels requiring safe DC isolation.
ABB OTDC switch disconnectors are trusted by renewable energy engineers, panel builders and electrical contractors for delivering safe, reliable DC isolation across photovoltaic, battery storage and industrial power 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...