Reliance 78777-2RC Thyristor Assembly Rectifier Rack

78177-2RC Thyristor Assembly Rectifier Rack from Reliance Electric is a high-power rectifier stack used to convert AC to DC in legacy Reliance Electric drive systems. This thyristor assembly employs a copper/selenium oxide plate stack construction and functions as a phase rectifier module suitable for three-phase power applications. The 78177-2RC is a discontinued part that was marketed under Reliance Electric, and brands associated with its era—such as ASEA BROWN BOVERI—reflect its historical lineage; today, new surplus or reconditioned units are offered by third-party suppliers. Buyers source this module for legacy drive systems that require matching rectifier stack components; distributors such as AX Control, IMS Supply, and Machinio list 78177-2RC as a Reliance Electric thyristor assembly rectifier rack.