OSNY3134B-T is an optocoupler manufactured by Optosupply. It is a photosensitive AC or DC isolated triac output optocoupler, which provides overall improved performance with very low input signal current. The device features a 4-pin dual-in-line package, a 5mm plastic case, and a wide operating temperature range of -40 to +85 °C. It has a coupler transistor output, with a Vdrm/Vrrm of 400V, and a Igt of 8mA. This device is suitable for applications that require higher isolation, such as in medical equipment, office automation, and automotive systems.