EKM6DC-630 1500V DC Molded Case Circuit Breaker (400A-630A) for Renewable Energy Systems
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Technical Data
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| Product Family ID | OS-ETK-EKM6DC-630 |
|---|---|
| Variant SKU Count | 3 |
| Supplier | ETK |
| Supplier Model | EKM6DC-630 |
| Product Type | MCCB |
| Available Current Ratings | 400A / 500A / 630A |
| Available Voltage Ratings | 2P |
| Rated Voltage | 2P |
| Rated Current | 400A / 500A / 630A |
| Frame Current | 630A |
| Frame Size / Ways | 630A |
| Rated Current | 400,500,630A / 400A / 500A / 630A |
| Rated Insulation Voltage | 1500V |
| Standard | IEC60947-2 |
| Uimp | 12kV |
Product Overview
400A to 630A DC MCCB for main inverter protection in utility-scale PV where the DC current from multiple combiner strings aggregates at the inverter DC input terminal. Three variants (400A, 500A, 630A) cover the full current range of mid-to-large central inverters.
At 1MW inverter capacity and 1500V DC, the DC current approaches 667A — the 630A rated variant would be undersized. Share the inverter rated power and DC voltage and we calculate the required protection rating before quoting.
630A DC MCCBs serve as the main DC disconnect for large commercial or small utility-scale arrays where multiple combiner box outputs are aggregated at the inverter DC bus. The 630A frame requires dedicated bus bar connections — confirm the applicable IEC or UL listing requirement for the destination market before ordering.
Applications
PV string and array protection
Combiner box internal protection
Inverter DC input circuits
Utility and C&I solar BOS
Certifications & Compliance
Frequently Asked Questions
How do I size the DC MCCB for a central inverter?
Divide the inverter rated DC power by the minimum MPPT voltage to get maximum DC current. Add a 10-20% margin and select the next standard rating. For a 630kW inverter at 1000V: 630,000W ÷ 1000V = 630A — select the 630A variant with no margin, or size up to the next available rating.
What breaking capacity is available at 1500V DC?
DC breaking capacity at 1500V is confirmed from the datasheet — DC arc energy at high voltage significantly reduces the interruptible current compared to the continuous current rating. Share the prospective fault current at installation and we verify the breaker can safely interrupt it.
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