Isolation surge voltage, VISO, is an internal device dielectric breakdown rating. Motorola Optoelectronics Device Data. ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted). DIP photocoupler, triac driver output.
High repetitive peak off-state voltage VDRMin.
High critical rate of rise of off-state voltage.
The MOC301XM and MOC302XM series are optically isolated triac driver devices.
Operational temperature range from -° C to 1° C. V, 60mA, -40°C ~ 85°C, Surface Mount, 6-SM Gull Wing, 6-SM UL. OPTOISOLATOR 5KV TRIAC 6DIP, 19- Immediate, $0. Working with TYPICAL opto vin and typical drive current (ie most optimistic case). Standard 6-Terminal Plastic DIP.
Gate-limiting resistor calculation. Connecting the resistor between the microcontroller and the gate of the TRIAC is recommended. This will limit the maximum driving current coming from the microcontroller. The following TRIAC parameters (from the datasheet ) must be used to determine . Example: TA = –40°C, IFT = mA. LED Trigger Current versus PW (normalized).
Random Phase Triac drivers are designed to be phase controllable. They may be triggered at any phase angle with- in the AC sine wave . Opto-isolators prevent high voltages from affecting the system receiving the signal. Commercially available opto-isolators withstand . You need to add the RS and CS shown on the right there. Here is the schematic: Triac with opto coupler. Live is usually connected to MT(middle pin in BT136) and appliance is connected to MT2.
I am not sure whether this is actually required.
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