Reliance Electric 410403-9AB Electrical Relay Module

Reliance Electric 410403-9AB is a thyristor (SCR) power-switching module in the 410403 family, designed for high-current AC power control in industrial equipment. The 410403 family is documented as thyristor devices used for solid-state switching, with variants such as the 410403-24AC described as a 230A, 1200V thyristor, illustrating the range of ratings available within the line. The 9AB suffix identifies a distinct configuration within that family; reseller catalogs list 410403-9AB as a new Reliance Electric part and categorize it as an SCR device, suitable for replacement in legacy systems. Intended uses for this class of device include precise control of AC power in drives, converters, and lighting applications, where fast turn-on/turn-off of high-current loads is required. As an OEM part, it is commonly found in spare-parts catalogs and aftermarket inventories alongside related 410403 variants, reflecting its role in maintaining older Reliance Electric control assemblies and power electronics.