Greenheck 383557 Relay Base 340155-7026 check the model number on

check the model number on the unit’s data plate before installation

Designed as a universal HVAC replacement part

For high-performance commercial HVAC control systems

Industry Standard Performance: Handles high inrush currents typical of inductive motor starts without premature contact pitting

or a dirty secondary heat exchanger

Greenheck 383557 Relay Base 340155-7026 check the model number onThe Greenheck 383557 Relay Base is a critical electrical component designed for high reliability HVAC relay switching and circuit control within commercial and industrial ventilation systems. This SPDT relay base (Single Pole Double Throw) provides the essential interface for standard 5 pin relays, ensuring secure terminal connectivity and simplified HVAC control wiring. Engineered for a broad operational range of 30F to 110F, it is frequently