EKM1-63DC Polarity PV DC Circuit Breaker | 1000V DC 6kA Breaking Capacity
Why Quality Matters?
Grouped by product family for cleaner RFQ selection: one page shows the available variant SKUs and key specification choices without creating duplicate product pages.
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Procurement Snapshot
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RFQ checklist
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Technical Data
Specification values for buyer review and RFQ matching
| Product Family ID | OS-ETK-EKM1-63DC |
|---|---|
| Variant SKU Count | 3 |
| Supplier | ETK |
| Supplier Model | EKM1-63DC |
| Product Type | DC MCB |
| Available Voltage Ratings | 1P(250VDC), 2P(500VDC), 4P(1000VDC) |
| Available Poles | 1P / 2P / 4P |
| Rated Voltage | 1P 250VDC; 2P 500VDC; 4P 1000VDC |
| Rated Current | 6~63A |
| Protection Degree | IP20 |
| Operating Temperature | -5°C to +40°C, Max. 95% humidity |
| Poles | 1P, 2P, 4P / 1P / 2P / 4P |
| Protection Degree | IP20 |
| Rated Current | 6~63A |
| Rated Voltage | 1P 250VDC; 2P 500VDC; 4P 1000VDC |
| Standard | IEC60947-2 |
| System Voltage | 1P(250VDC), 2P(500VDC), 4P(1000VDC) |
| Uimp | 4kV |
Procurement & BOM Notes
How EKM1-63DC Polarity PV DC Circuit Breaker | 1000V DC 6kA Breaking Capacity is sourced
OmniSol sources EKM1-63DC Polarity PV DC Circuit Breaker | 1000V DC 6kA Breaking Capacity factory-direct as part of the DC MCB family, quoted against your project quantity, destination port and product family id (OS-ETK-EKM1-63DC). Pricing and lead time are confirmed by SKU and order size at the RFQ stage, and OmniSol can propose a current-equivalent option if the exact variant is unavailable, so the line stays on schedule.
BOM fit
EKM1-63DC Polarity PV DC Circuit Breaker | 1000V DC 6kA Breaking Capacity sits between the array and the inverter, so it is specified with the string count, system voltage and protection layout of the project. It ships consolidated with cable, connectors and the rest of the electrical BOS, under one QC report and one document set.
Certification check
Confirm the EKM1-63DC Polarity PV DC Circuit Breaker | 1000V DC 6kA Breaking Capacity certificates — IEC60947-2 — the breaking capacity and any market-specific listing before ordering. OmniSol supplies the datasheet, component brand list and inspection photos.
Product Overview
Polarity-sensitive DC MCB with 6kA breaking capacity and 1P/2P/4P options for PV string and combiner circuits rated up to 1000V DC. The polarity-sensitive design requires correct positive/negative terminal assignment — reversed installation reduces arc extinction performance.
Six to 63A current range covers individual string protection, combiner branch circuits, and inverter auxiliary DC protection. For non-polarity-sensitive applications in the same current range, see ETM1-63DC.
At 63A, the EKM1-63DC is typically used on combiner box main outputs or inverter string inputs in medium commercial arrays. The DC-specific arc extinguisher design prevents contact welding under the sustained fault current that characterises PV DC circuits, where current continues to flow as long as the panels are illuminated.
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 does polarity-sensitive mean for this DC circuit breaker?
A polarity-sensitive MCB requires the positive terminal connected to the marked terminal. Reversed installation reduces breaking capacity because the arc suppression design depends on the current direction. Always follow the wiring diagram — the positive terminal is marked on the device.
Is 6kA breaking capacity sufficient for PV string circuits?
For residential and small commercial strings, 6kA is generally adequate. For large combiner outputs or strings close to a large inverter, calculate the prospective fault current at the installation point and verify it is below 6kA before specifying this device.
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