Isocom Components 2004 LTD’s Optoisolators - Transistor, Photovoltaic Output IS181GR is a mini-flat three-and-three-quarter kilovolt (3.75KV) transformer designed to provide ultra-high isolation between a photocoupled input and a transistor output. With a peak working voltage of up to two hundred and fifty volts (250V), this transformer offers superior performance in even the most demanding of applications. Other features include a wide working temperature range of -40°C to +85°C, excellent common mode transient immunity up to 25kV/μs, and a high breakdown voltage up to 4kV. Ideal for a variety of applications related to energy conservation, motor control and automation, the IS181GR offers the reliability and safety you need to protect against voltage spikes and overloads.