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. Its max LED trigger current of 10 mA means a standard 5 V or 3.3 V logic output can drive it directly through a simple series resistor — no extra transistor buffer needed. 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.
Isolation, off-state voltage, and zero-crossing — what they mean for your BOM
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.
Package and mounting — what the repair bench sees
The 6-SMD Gull Wing package is a surface-mount footprint that reflows easily with standard profiles. The supplier device package is 6-SMD, and the part ships in a Tube. For rework, the gull-wing leads are inspectable and touch-up friendly with a fine iron tip — no hidden joints under the body.
Lifecycle and sourcing reality
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.
Temperature range and environment fit
Rated for -40°C to 85°C operating temperature, the MOC3032SM is suited for industrial control cabinets, outdoor telecom shelters, and HVAC equipment where the ambient stays inside that window. The UL approval simplifies compliance for North American markets.