Why this part's trigger current and dV/dt matter for your AC load switch
The MOC3032SM is a 1-channel optoisolator with a Triac output from onsemi, designed to switch AC loads while providing galvanic isolation. The minimum static dV/dt of 1 kV/µs gives you a solid margin against false turn-on from line transients or motor noise, which is the failure mode that often takes out a board in the field.
Rated for 4170 Vrms isolation, this part meets reinforced insulation requirements for mains-connected equipment. The 250 V off-state voltage covers 120/230 VAC line switching with derating headroom. The built-in zero-crossing circuit fires the Triac near the AC zero voltage, which reduces inrush current into capacitive or inductive loads — a common source of early relay failure in heating or lighting controls.
The 6-SMD Gull Wing package is a surface-mount footprint that reflows easily with standard profiles. For rework, the gull-wing leads are inspectable and touch-up friendly with a fine iron tip — no hidden joints under the body.
onsemi lists the MOC3032SM as Active and ROHS3 compliant. That means no end-of-life notice on the horizon, and you can commit this to a production BOM with confidence. Sourced per RFQ — we confirm current availability and pricing against your line-item quantity at quote time.
The UL approval simplifies compliance for North American markets.