Search Mechanical Products Website


Mechanical Products Blog

Press Release - Series 87

Switchable Heavy Duty Marine Rated

LOMBARD, IL – Mechanical Products (MP) Announces release of S87 - Heavy Duty CB / Marine Rated Circuit Breaker (MRCB)

Available in ratings from 25 to 250 Amps, the NEW Series 87 offers a resettable single lever breaker in a comparable mounting footprint in both panel and surface mount configurations.  MP completed a comprehensive review of the needs required in current and future demanding harsh applications that have increased amperage requirements.  The expansion of amperage rating from 200A up to 250A is significant in this style and package offering.  

MP designed the new 87 Series with two sets of cadmium free contacts for improved performance over the competition and to meet the requirements for environmental factors in the elimination of cadmium.  They have a standard 5/16” and optional 3/8” threaded termination.  Type III have a rated voltage of 48VDC Max.   All models have an Interrupt Capacity of 5000A at 14VDC and a dielectric strength of 1500VAC.  They comply with SAE Standard J553 & J1171, are IP66 rated and are ROHS compliant.

The MP Series 87 is designed for various applications and used in: Trucks, Buses, RV’s & Motorhomes, Electric Vehicles, Boats & Yachts and more!  The NEW Series 87 MRCB Circuit Breakers are an excellent complement to MP’s existing transportation product lineup including Series 17, 18, & 19 circuit breakers, also designed for harsh environments and available up to 300 Amps.  The MP Series 87 is an upgraded solution to the Bussmann 187 and Blue Seas 187 Series Circuit Breakers (MRCB).

The Series 87 is available through MP’s authorized distribution partners.


Click to view the S87 Datasheet

About Mechanical Products

As a leading developer and manufacturer of high quality circuit protection devices, Mechanical Products is well known for providing vehicle manufacturers across the globe with solutions that protect against the hazards of electrical overcurrent, especially in harsh environments. Count on it.

MP has been a leading supplier of thermal circuit protection since 1943. MP circuit breakers are used in thousands of critical & commercial applications ranging from construction & electrical generation, marine, medical, military vehicles, power management & battery backup, recreation vehicles, residential & appliance, specialty vehicles and battery chargers. MP has been management owned since 1998 and maintains manufacturing capabilities in the US and overseas with US facilities in Jackson, Michigan and Lombard, Illinois.

Get Fresh Blog Updates


Product Catalog

Download Catalog

Mechanical ProductsResources

Download the Circuit Breaker Selection Guide.  Covering ratings of 0.5 – 300 amps, the selection guide is a summary overview of the Series of circuit breakers made by MP.  For further details, the individual Series Data Sheets may be downloaded.

View Resources

Latest MP Articles

View All MP Articles