Regent Controls ER651-21-120 Relay

Regent Controls ER651-21-120 Relay is an all-solid-state relay engineered to switch AC loads in industrial control circuits. It is specified for 120V operation at 50/60 Hz and belongs to Regent’s ER651 family of solid-state relays that provide true isolation between the control input and the load circuit. Historically, Regent’s ER651 devices are described as compact, rugged solid-state relays that emphasize isolation of line, load, and control circuits to enhance safety and reliability in automation environments. The ER651-21-120 model is designed for quiet, maintenance-free switching of a 120Vac load in appropriate control architectures, offering fast switching and long-term performance without moving parts. This makes it a practical drop-in alternative to electromechanical relays in many applications where durability and reduced wear are important.