The SST Series Signal Line Surge Protection Device is designed for discrete signalling 4-20mA protocols. Units provide protection against any Transient Voltage that exceeds the nominal signalling voltage. Each line is protected against surge current impulses up to 10kA. The SST Series is configured to work in series or parallel with the measurement/control lines being protected, diverting harmful transient energies while maintaining a tight clamp at the peak voltage. SST Signalling units protect 1 circuit consisting of 2 wires (1 pair) plus ground. Units are designed to operate in a wide temperature range and are ideal for the protection of 4-20mA current loop transducers, and similar instrument/control applications. Consult the factory with any special package and circuit performance requirements.
