The MA Replacement Trigger is a newly-manufactured, footprint-compatible, and functionally-compatible replacement trigger for use in the popular pump relay boxes for marine applications. Its design, components, and reliability are superior to the OEM originals. The MA Replacement Trigger is dual-voltage and therefore you only need one part to work in both 115V and 230V applications. Also, it uses a totally solid-state design. There is no mechanical relay to buzz or chatter, and possibly fail.