Three-phase solid state relays in the Sight-Pac series:

• New, highly efficient back-to-back thyristors with TMS technology are used in all three-phase solid-state relays to provide large surge currents and a long lifespan.
• Intended to regulate loads linked in star or delta configurations (if balanced without neutral) using three wires and three phases.
• The SSR switches two of the three phases, with the third being connected directly.

Three-phase, two-leg SMB series solid state relay:

• Made to regulate three-phase loads that are coupled in a delta or star configuration (if balanced).
• The SSR switches two of the three phases, with the third phase being connected directly.
• Zero Cross solid-state relay in three phases with a single direct connected phase.
• Intended to support resistive loads.