ABB OTDC32U4 4-pole double-circuit PV disconnect switch rated at 32 A for 600 V DC UL, 660 V DC IEC and 20 A at 1000 V DC IEC applications.
The ABB OTDC32U4 (1SCA136703R1001) is a compact and dependable 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 reliable switching performance while complying with IEC 60947-3 and UL 508i standards for renewable energy installations.
Designed for OEMs, panel builders and electrical contractors, the OTDC32U4 features a 4-pole double-circuit configuration with base or DIN rail mounting, making it ideal for isolating multiple photovoltaic strings. Its compact footprint, touch-safe IP20 terminals and flexible installation simplify panel assembly while ensuring dependable long-term performance.
With a 32 A operational rating at 600 V DC (UL), 32 A at 660 V DC (IEC) and 20 A at 1000 V DC (IEC), the ABB OTDC32U4 provides dependable DC isolation for solar installations and industrial DC applications. A terminal bolt kit is included, while compatible operating handles and shafts are supplied separately.
DC disconnect switches provide a safe means of isolating photovoltaic strings 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 OTDC32U4 combines ABB's proven engineering with compact construction, enabling straightforward integration into photovoltaic arrays, battery energy storage systems and industrial DC installations while maintaining high levels of safety and reliability.
| Current | 50 A |
|---|---|
| Voltage | 000 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Manufacturer | ABB |
| Series | OTDC Switch Disconnectors |
| Model | OTDC32U4 |
| MPN | 1SCA136703R1001 |
| Product type | DC PV disconnect switch |
| Rated operational current (UL) | 32 A at 600 V DC |
| Rated operational current (IEC) | 20 A at 1000 V DC |
| Rated operational voltage | 1000 V DC |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 8 kV |
| Rated conditional short-circuit current (Inc) | 10 kA at 1000 V DC |
| Number of poles | 4 |
| Configuration | Double circuit |
| Protection rating | IP20 |
| Mounting type | Base or DIN rail mounting |
| Terminal capacity | 2.5 to 16 mm² (12 to 6 AWG) |
| Dimensions (H × W × D) | 89 × 54.5 × 87 mm |
| Weight | Approx. 0.15 kg |
| HS Code | 85365080 |
| Country of Manufacture | Estonia |
The OTDC32U4 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 32 A at 600 V DC (UL), 32 A at 660 V DC (IEC) and 20 A at 1000 V DC (IEC).
The OTDC32U4 features a 4-pole double-circuit configuration for isolating multiple PV strings.
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 energy 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...