420E2 series

      The 420E2 series is designed to have a two stage transient voltage protector providing primary and secondary protection against lightning, inductive switching and electrostatic discharge (ESD) transient threats.The first stage would divert the transient current through the ground terminal return path and then the second stage would clamp the voltage to a safe level without interruption of service. 420E2 series is designed to protect 4-20mA analog control loops from differential and common mode transients.A transient voltage suppressor is also internally connected across each line pair for differential mode protection.Each line pair would be referenced to ground.This 420E2 series can also be used on signal/data lines,telephone, security timing and control interface circuits.

      This 420E2 series have six features.The first one is that it is designed for 4-20mA current loops.The second one is that its automatic reset which user do not interrupt service.The third one is that 420E2 series would have permanent two-stage line pair protection.The fourth one is that it would have a common mode and also a differential mode protection.The fifth one is that it would have subnanosecond response time and would be very quick.The last one is that 420E2 series has effective against lightning, inductive switching and ESD.That are all the features.It also has four applications.The first is security alarm systems.The second one is industrial control & monitoring systems.The third one is remote tech site station.The last application is process control loops.

      Some maximum ratings of the 420E2 series,which is tested @ 25°C(unless otherwise specified),have been concluded into several points.The first one is about its operating line current which would be 100 mA.The second one is about its operating temperature which would be from -55 to 100 °C.The third one is about the storage temperature of 420E2 series which would also be from -55 to 100 °C.The fourth one is about its transient source voltage which would be 6 kV.The last one is about the transient current (8/20s) per line of 420E2 series which would be 10 kA.