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Why use a solid state relay (SSR) and not a motor contactor?

April 26, 2017contactor motor Relay solid ssr State

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Why use a solid state relay (SSR) and not a motor contactor?

1 Answer

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10 Posted

The AC power switching is done via a solid-state relay. This type of relay is very reliable. It has a quiet state change, (meaning no clanking noise) relative to mechanical relays (which can be heard thru walls when opened or closed). Optical isolation from the power and the control is achieved with this relay, supplying the pump(s) with on/off power. Our SSR is rated for 40 amps, max load for the panel is 20 amps -safety factor of 2.