Compared to an electromechanical relay, this solid-state relay features no moving parts, which helps to offer fast response and long service life. It switches when an external voltage is applied across its control terminals. The solid-state design eliminates wear from moving parts, and it also does not feature arcing contacts that could potentially deteriorate. Solid State Relay, In 90 to 280VAC, 40 This product contains a chemical that is regulated under California Proposition 65. Warning: This product contains a chemical known to the State of California to cause cancer. Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. -