What the ratings mean for fit
The AQY212FG2SZ: Rated for 1.25 A continuous load current at 0 V to 60 V AC or DC — the 500 mOhm max on-state resistance sets the conduction loss: at 1.25 A, expect roughly 0.78 W dissipation inside the 4-SOP package, which governs the derating at elevated ambient temperatures. SPST-NO (1 Form A) output with AC/DC bipolar capability — the MOSFET output stage switches both polarities, so it works for load switching in signal paths, sensor power gating, or low-current actuator control where polarity reversal is possible.
Package and board integration
Housed in a 4-SOP (0.173", 4.40 mm body width) with Gull Wing terminations — the surface-mount footprint matches standard SOP-4 land patterns, and the 1.27 mm pin pitch is layout-friendly on two-layer boards. Supplied in Tape & Reel (TR) — compatible with pick-and-place assembly; the reel quantity is the standard packaging unit for this form factor.