120 mA solid-state relay in a 4-SOP package
The AQY221N2S is a PhotoMOS™ AQY series solid-state relay from Panasonic Electric Works, configured as a single-pole single-throw normally-open (SPST-NO, 1 Form A) output. It switches AC or DC loads up to 120 mA across a 0 V to 40 V range, with a maximum on-state resistance of 12.5 Ohms. The output is rated for RF signal switching, meaning the relay can pass analog or small-signal RF without the distortion typical of mechanical contacts.
Housed in a 4-SOP (4.40 mm body width) surface-mount package with gull-wing leads, the AQY221N2S occupies a compact footprint suitable for dense PCB layouts. The supplier device package is also designated 4-SOP, and the termination style is gull wing for reliable solder-joint inspection. The relay is supplied in tube packaging, which is typical for low-volume prototyping and rework-friendly handling. For high-volume reels, the base product number AQY221 may have alternate packaging options — confirm the packing code suffix when ordering.