A Solid State Relay (SSR) is an electronic switching device that uses semiconductor components to perform the same function as traditional mechanical relays. Unlike mechanical relays, which rely on moving parts to open or close a circuit, SSRs use solid-state components, such as thyristors, triacs, or MOSFETs, to control electrical flow. This makes SSRs more durable, faster, and efficient, particularly in the demanding environments of New Energy Vehicles.

    The significance of SSRs in NEVs lies in their ability to manage high power and voltage with minimal physical wear and tear. NEVs, including electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs), rely on intricate power systems that require precise and rapid control. This includes managing the energy flow to and from the battery, controlling the electric motor, and ensuring the smooth operation of various auxiliary systems such as air conditioning and charging infrastructure. The reliability and speed of SSRs make them a critical component in these applications.