EKM6DC-315 1500V DC Molded Case Circuit Breaker (280A-315A) for Renewable Energy Systems
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| Product Family ID | OS-ETK-EKM6DC-315 |
|---|---|
| Variant SKU Count | 3 |
| Supplier | ETK |
| Supplier Model | EKM6DC-315 |
| Product Type | MCCB |
| Available Current Ratings | 280A / 300A / 315A |
| Available Voltage Ratings | 2P |
| Rated Voltage | 2P |
| Rated Current | 280A / 300A / 315A |
| Frame Current | 315A |
| Frame Size / Ways | 315A |
| Rated Current | 280,300,315A / 280A / 300A / 315A |
| Rated Insulation Voltage | 1500V |
| Standard | IEC60947-2 |
| Uimp | 12kV |
Product Overview
Covers 280A, 300A, and 315A in 1500V DC format for large combiner outputs where the 250A ceiling of EKM6DC-250 is exceeded. Fine graduation across three current ratings allows close matching to the calculated output current without over-sizing the protection device.
This current range typically covers combiners serving 20 to 26 strings at 12-14A Isc per string in a 1500V architecture. Confirm the exact string count and Isc value to determine whether 280A, 300A, or 315A is the appropriate rating.
315A frame covers the main DC disconnect for 100–250kW commercial systems. As connected capacity approaches the upper end of the current rating, confirm the MCCB breaking capacity has not been exceeded — large arrays may require current-limiting fuses in series with the MCCB to limit let-through energy during a close-in fault.
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
What size combiner requires a 280-315A DC MCCB?
A combiner with 22-24 strings at approximately 12A Isc produces 264-288A combined output — this falls in the 280-315A range. Confirm your exact string count and Isc value to select the closest standard rating with adequate margin.
Is the mounting footprint compatible with EKM6DC-250?
Both families share similar MCCB frame dimensions. Terminal sizes and mounting bolt spacing should be confirmed against your switchboard cutout before substituting — confirm frame dimensions at RFQ.
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