Triac optocoupler for 600 V AC line switching
The TLP3052A(TP1,F) is a 1-channel triac-output optoisolator from Toshiba, designed for driving medium-power AC loads like solenoids, valves, and small motors from a logic-level control side. Its 600 V off-state voltage suits 240 VAC mains applications with margin, and the 5000 Vrms isolation meets reinforced insulation requirements for safety-agency approval (CQC, cUR, UR per). This is a non-zero-crossing (random-phase) part, meaning the triac can be triggered at any point in the AC cycle — essential for phase-angle dimming, soft-start, or applications where zero-crossing switching would cause timing errors.
2 kV/µs dV/dt immunity and trigger current
A minimum static dV/dt of 2 kV/µs (typical,) ensures the output triac does not false-trigger on fast voltage transients from inductive load switching or mains noise — a common failure point in industrial environments. The LED trigger current (Ift) is 10 mA max, with a forward voltage of 1.15 V typical. This is compatible with 3.3 V or 5 V logic outputs driving the LED through a current-limiting resistor; the 50 mA absolute-maximum forward current provides headroom for derating. On-state RMS current is rated at 100 mA max, and the holding current (Ih) is 600 µA typical — the minimum load current needed to keep the triac latched once triggered. Below this, the triac may drop out at the zero crossing, so the load must draw at least ~1 mA to stay on.
Active production in 6-SMD gull-wing package
Toshiba lists the TLP3052A(TP1,F) as Active and ROHS3 compliant. Cut Tape (CT) is also available for prototyping or low-volume builds. The package is a 6-SMD with 5 leads in gull-wing form, also referred to as 6-SO, 5 Lead. Surface-mount assembly with a standard reflow profile; no special MSL handling beyond typical moisture-sensitive device precautions.