Mechanical Products Series 87 Enhanced
PRODUCT UPDATE: Mechanical Products Series 87 Enhanced
Now rated to 56VDC — the highest maximum voltage in its class.
The MP Series 87 is a heavy-duty, marine-rated switchable circuit breaker designed for high-amp DC power systems. It is a single-pole, thermal-type breaker with manual reset and on-off switch function, built for the demanding conditions of marine, commercial vehicle, RV, and related DC applications.
Mechanical Products has enhanced the Series 87 with an updated maximum voltage rating — a change that directly addresses the evolving demands of modern DC power architectures and positions the Series 87 as the highest-voltage-rated circuit breaker of its type available from any manufacturer worldwide.
| MP is the only manufacturer in the world that makes this style circuit breaker rated up to 56VDC today. |
The Key Enhancement:
56VDC Maximum Voltage
The Series 87 has been upgraded from a 48VDC maximum to 56VDC maximum for Type III ratings from 25A through 200A. For ratings above 200A (225A and 250A), the maximum voltage remains 48VDC.
| Amp Rating | MP Series 87 Max VDC | Traditional Competitive Max VDC |
| 25A – 200A | 56VDC | 48VDC |
| >200A (225A, 250A) | 48VDC | Not available |
This increase directly benefits systems operating at nominal 48V, where charging transients and system tolerances can push operating voltage above the 48VDC ceiling of traditional designs. With 56VDC headroom, the Series 87 provides a reliable margin of protection without requiring a design compromise or product substitution.
The Series 87 enhancement delivers a significant upgrade for high-amp DC circuit protection. With a maximum voltage rating of 56VDC, a full 25–250A amperage range, thermoplastic construction, centered stud design, standard hardware, and IP67 sealing, the Series 87 is built for demanding 48VDC and 56VDC applications where reliable switchable circuit protection matters most.
The Series 87 is available now across the full 25–250A range. For complete specifications, part number configuration, and supporting documentation, visit the Series 87 product page and resources section at mechprod.com.
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