Staff Answer
May 11, 2026 - 11:04 AM
When comparing the 187-Series and 285-Series DC circuit breakers from PKYS, the primary distinction is between a "heavy-duty" model and a "lighter-duty" model. While both are marine-rated, ignition-protected, and weatherproof, they differ significantly in their capacity to handle high-current systems.
Note: Both series are available in Surface Mount (wires connect to the front) and Panel Mount (wires connect to the back) configurations. If you are replacing an existing breaker, ensure you match the mounting style to avoid needing to drill new holes or rewire your panel.
| Feature | 187-Series (Heavy-Duty) | 285-Series (Medium-Duty) |
| Max Amp Rating | Up to 200 Amps | Up to 150 Amps |
| Terminal Stud Size | 5/16" (M8) | 1/4" (M6) |
| Interrupt Rating | 5,000 Amps (@ 12V DC) | 3,000 Amps (@ 12V DC) |
| Best For | Large battery banks, Inverters | Windlasses, smaller sub-panels |
| Price Point | Premium | Budget-friendly |
