The Isocom Components 2004 LTD Optoisolators - Transistor, Photovoltaic Output TLP521-4XSM provides isolation and protection for electrical signals. This module is designed for efficiency and allows for isolation of up to 5.3kV across four channels. With its 16SMD design, this device has excellent thermal dissipation and is suitable for the most demanding applications. It is also RoHS compliant and features high insulation, low forward voltage, and low on resistance values. This reliable optoisolator offers excellent noise immunity and is capable of working on both AC and DC voltages. It is suitable for various industrial devices and is easy to install, making it a great choice for anyone looking for a durable and effective optoisolator.