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1SCA134578R1001 ABB OTDC25UST2 2 Pole 1000VDC 40A Switch Disconnector
ABB OTDC25UST2 2-pole single-circuit US door-mounted PV disconnect switch rated at 25 A for 600 V DC UL and 660 V DC IEC applications.
Why Choose the ABB OTDC25UST2 PV Disconnect Switch?
The ABB OTDC25UST2 (1SCA134578R1001) 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 OTDC25UST2 features a 2-pole single-circuit US door-mounted configuration with a factory-fitted jumper, making it ideal for photovoltaic combiner boxes and renewable energy systems. Its compact footprint, touch-safe IP20 terminals and flexible installation simplify panel assembly while ensuring dependable long-term performance.
With a 25 A operational rating at 600 V DC (UL) and 25 A at 660 V DC (IEC), the ABB OTDC25UST2 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.
Key Advantages
- Compact DC PV disconnect switch for safe circuit isolation.
- 25 A switching capacity for higher current photovoltaic installations.
- 2-pole single-circuit US door-mounted configuration.
- Factory-fitted jumper for simplified installation.
- Touch-safe IP20 protected terminal clamps.
- Reliable ABB switching technology for demanding industrial environments.
Key Features
- ABB OTDC switch disconnector series.
- Model: OTDC25UST2.
- Manufacturer part number: 1SCA134578R1001.
- 25 A at 600 V DC (UL).
- 25 A at 660 V DC (IEC).
- 2-pole single-circuit US configuration.
- Door-mounted version.
- Factory-fitted jumper included.
- Terminal bolt kit included.
- Handles and shafts available separately.
Reliable DC Isolation for Solar Energy Systems
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 OTDC25UST2 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.
Typical Applications
- Solar photovoltaic systems.
- PV combiner boxes.
- Battery energy storage systems.
- Industrial DC distribution panels.
- Renewable energy installations.
- OEM electrical control equipment.
Technical Specifications
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| Voltage | 1000 V | |
|---|---|---|
| Mounting Type | Door / front mounting | |
| Device Type | Switch Disconnector | |
| Supply Type | DC | |
| Product Series | ABB OTDC | |
| Current | 40 A | |
| IP Rating | IP20 | |
| Poles | 2-pole | |
| Manufacturer | ABB | |
| Series | OTDC Switch Disconnectors | |
| Model | OTDC25UST2 | |
| MPN | 1SCA134578R1001 | |
| Product type | DC PV disconnect switch | |
| Rated operational current (UL) | 25 A at 600 V DC | |
| Rated operational current (IEC) | 25 A at 660 V DC | |
| Rated insulation voltage (Ui) | 1000 V | |
| Rated impulse withstand voltage (Uimp) | 8 kV | |
| Number of poles | 2 | |
| Configuration | Single circuit (US type) | |
| Protection rating | IP20 | |
| Mounting type | Door mounting | |
| Terminal capacity | 2.5 to 16 mm² (12 to 6 AWG) | |
| Dimensions (H × W × D) | 74 × 54.5 × 64 mm | |
| Weight | Approx. 0.15 kg | |
| Supplied with | Factory-fitted jumper and terminal bolt kit | |
| HS Code | 85365080 | |
| Country of Manufacture | Estonia |
Frequently Asked Questions
What is the ABB OTDC25UST2 used for?
The OTDC25UST2 is a DC PV disconnect switch designed to safely isolate photovoltaic strings and other direct current circuits during maintenance and servicing.
What are the voltage and current ratings?
The switch is rated at 25 A at 600 V DC (UL) and 25 A at 660 V DC (IEC).
Does the OTDC25UST2 include a factory-fitted jumper?
Yes. The OTDC25UST2 is supplied with a factory-fitted jumper for simplified installation.
Does the switch include an operating handle?
No. The switch includes a terminal bolt kit, while compatible operating handles and shafts are supplied separately.
Where is the OTDC25UST2 typically installed?
It is commonly installed in photovoltaic combiner boxes, battery energy storage systems and industrial DC control panels requiring safe circuit isolation.
Trusted by Renewable Energy Professionals Worldwide
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.
