PhotoMOS solid-state relay — 80 V signal switching
The AQY225R2VY is a PhotoMOS AQY-series SPST-NO (1 Form A) solid-state relay in a 4-SSOP surface-mount package — the optically-coupled LED input drives the MOSFET output with no moving parts, eliminating contact bounce and wear mechanisms that limit mechanical relay life. Maximum load voltage is 80 V — this ceiling makes it suited for signal-level and low-power distribution rails rather than mains or motor-control paths. Load current is rated 120 mA, and the maximum on-state resistance sits at 15 Ω, which means the voltage drop across the relay under load is non-trivial for higher-current signal paths and must be accounted for in the insertion-loss budget. The LED input requires a minimum of 1.14 VDC to actuate — compatible with standard logic-level drivers; the output type is listed as AC, DC (RF), confirming it will pass both polarities on the load side without the forward-bias constraints of a single-MOSFET SSR.