Solid-state coolerAlso known as Solid State Relays (also known as solid-state relays), the current English name is Solid State Relay, abbreviated as SSR.Solid-state heat sinkA relay-characteristic, non-contact switch device that replaces traditional electrical contacts with semiconductor devices as the switching element, specifically a single-phase SSR as a four-terminal active device. In this device, the two input control terminals and two output terminals are optically isolated from each other. Upon applying a DC or pulse signal to the input terminal and reaching a certain current value, the output terminal can potentially transition from the off-state to the on-state.

       Solid-state heat sinkReliable performance, long lifespan, noiseless, sparkless, and electromagnetic interference-free, with rapid switching speed and strong anti-interference capability. It's compact, shock and vibration-resistant, and explosion-proof, moisture-proof, and corrosion-resistant. It is compatible with logic circuits such as TTL, DTL, and HTL, and can directly drive high current loads with a minimal control signal. However, its main drawback is the forward voltage drop (requiring appropriate heat dissipation measures), leakage current in the off-state, non-compatibility with AC, limited number of contact groups, and lower achievable standards for overcurrent, overvoltage, voltage rise rate, and current rise rate.