Active production, zero-crossing triac driver
The MOC3163M is an onsemi optoisolator with a triac output and an integrated zero-crossing circuit — it triggers the output triac only near the AC load voltage zero, reducing inrush current and EMI when switching resistive or lightly inductive loads. The part is listed as Active, so it remains a current BOM line without an imminent end-of-life watch.
Isolation, off-state voltage, and dV/dt immunity
Rated for 4170 Vrms isolation between the LED input and the triac output, this part suits applications requiring reinforced insulation per UL. The off-state voltage is 600 V, which covers 240 VAC mains with margin. Static dV/dt immunity is a minimum of 1 kV/µs — this prevents the triac from falsely triggering on fast voltage transients from motor contactors or relay switching.
Package, temperature range, and drive current
Housed in a 6-DIP through-hole package with a 0.300-inch (7.62 mm) body width, the MOC3163M operates over -40°C to 85°C, covering most industrial and appliance environments. The LED forward voltage is 1.3 V typical, and the maximum LED trigger current is 5 mA — compatible with 3.3 V or 5 V logic outputs through a current-limiting resistor. Hold current is 500 µA typical, so the triac latches once triggered and turns off at the load current zero crossing.