The IP-140-D provides industrial surge suppression and has been designed to protect sensitive process control equipment and instrumentation from proximity lightning strikes and other surge sources, this multi-stage design utilizes gas ionization-based technology as primary protection stage. A secondary stage incorporates a high-speed, transient voltage suppression (TVS) circuit. The final stage employs ultra-fast, thermal-based circuit breakers with auto-reset capability. This final stage not only supports the primary and secondary stage protection, but also provides equipment protection from mis-wiring or equipment failure, which may introduce high voltage or current onto the control loop. DIN rail mount. DIN rail clip supplied.