ABB OTDC16UST4 4-pole double-circuit PV disconnect switch rated at 16 A for 600 V DC UL and 660 V DC IEC applications, designed for photovoltaic systems and industrial DC isolation.
The ABB OTDC16UST4 (1SCA134582R1001) is a compact and reliable DC PV disconnect switch engineered to provide safe isolation for photovoltaic (PV), battery energy storage and industrial direct current applications. As part of the trusted ABB OTDC switch disconnector series, it delivers dependable switching performance while complying with recognised IEC and UL standards for renewable energy installations.
Designed for OEMs, panel builders and electrical contractors, the OTDC16UST4 features a 4-pole double-circuit US configuration, making it ideal for isolating multiple photovoltaic strings. Its compact design, touch-safe terminals and flexible door mounting arrangement provide straightforward installation and dependable long-term operation in demanding environments.
With a 16 A operational rating at 600 V DC (UL), 16 A at 660 V DC (IEC) and a double-circuit US configuration, the ABB OTDC16UST4 is ideally suited to photovoltaic systems, battery storage installations and industrial DC applications. The switch is supplied with a terminal bolt kit, while compatible operating handles and shafts are ordered separately.
DC disconnect switches provide a safe means of isolating photovoltaic strings and other direct current circuits during installation, maintenance and servicing. The ABB OTDC range has been specifically developed for renewable energy applications, delivering dependable switching performance and long service life in demanding operating environments.
The OTDC16UST4 combines ABB's proven engineering with compact construction, enabling straightforward integration into photovoltaic arrays, battery storage systems and industrial DC installations while maintaining high levels of safety and reliability.
| Current | 32 A |
|---|---|
| Voltage | 000 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Manufacturer | ABB |
| Series | OTDC Switch Disconnectors |
| Model | OTDC16UST4 |
| MPN | 1SCA134582R1001 |
| Product type | DC PV disconnect switch |
| Rated operational current (UL) | 16 A at 600 V DC |
| Rated operational current (IEC) | 16 A at 660 V DC |
| Number of poles | 4 |
| Configuration | Double circuit (US type) |
| Protection rating | IP20 |
| Mounting type | Door mounting |
| Dimensions (H × W × D) | approx. 74 × 54.5 × 87 mm |
| Weight | approx. 0.15 kg |
| Supplied with | Terminal bolt kit |
| HS Code | 85365080 |
| Country of Manufacture | Estonia |
The OTDC16UST4 is a DC PV disconnect switch designed to safely isolate photovoltaic strings and other direct current circuits during maintenance and servicing.
The switch is rated at 16 A at 600 V DC (UL) and 16 A at 660 V DC (IEC).
The OTDC16UST4 features a 4-pole double-circuit US configuration for photovoltaic applications.
No. The switch includes a terminal bolt kit, while compatible operating handles and shafts are supplied separately.
It is commonly installed in photovoltaic combiner boxes, battery storage systems and industrial DC control panels requiring safe circuit isolation.
ABB OTDC disconnect switches are trusted by solar installers, electrical contractors and panel builders for delivering dependable DC isolation across photovoltaic and industrial renewable energy 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...