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1SCA134379R1001 ABB OTDC25US4 4 Pole 1000VDC 40A Switch Disconnector
ABB OTDC25US4 4-pole double-circuit US PV disconnect switch rated at 25 A for 600 V DC UL and 660 V DC IEC applications, designed for photovoltaic systems and industrial DC isolation.
Why Choose the ABB OTDC25US4 PV Disconnect Switch?
The ABB OTDC25US4 (1SCA134379R1001) 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 OTDC25US4 features a 4-pole double-circuit US configuration, making it ideal for isolating multiple photovoltaic strings. Its compact footprint, touch-safe IP20 terminals and flexible base or DIN rail mounting simplify installation 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 OTDC25US4 provides dependable DC isolation for solar installations and other demanding direct current applications. The switch is supplied with a terminal bolt kit, while compatible operating handles and shafts are ordered separately.
Key Advantages
- Compact DC PV disconnect switch for safe circuit isolation.
- 25 A switching capacity for higher current photovoltaic installations.
- 4-pole double-circuit US configuration for multiple PV strings.
- Suitable for base or DIN rail mounting.
- Touch-safe IP20 protected terminal clamps.
- Reliable ABB switching technology for demanding industrial environments.
Key Features
- ABB OTDC switch disconnector series.
- Model: OTDC25US4.
- Manufacturer part number: 1SCA134379R1001.
- 25 A at 600 V DC (UL).
- 25 A at 660 V DC (IEC).
- 4-pole double-circuit US configuration.
- Base or DIN rail mounting.
- Terminal bolt kit included.
- Handles and shafts available separately.
- Designed specifically for photovoltaic and renewable energy applications.
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 OTDC25US4 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 | DIN rail | |
| Device Type | Switch Disconnector | |
| Supply Type | DC | |
| Product Series | ABB OTDC | |
| Current | 40 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 4-pole | |
| Manufacturer | ABB | |
| Series | OTDC Switch Disconnectors | |
| Model | OTDC25US4 | |
| MPN | 1SCA134379R1001 | |
| 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 | 4 | |
| Configuration | Double circuit (US type) | |
| 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 | |
| Supplied with | Terminal bolt kit | |
| HS Code | 85365080 | |
| Country of Manufacture | Estonia |
Frequently Asked Questions
What is the ABB OTDC25US4 used for?
The OTDC25US4 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).
What configuration does the OTDC25US4 use?
The OTDC25US4 features a 4-pole double-circuit US configuration for isolating multiple PV strings.
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 OTDC25US4 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.
