The ST02D-170-7000 with Zener Diodes Power Zeners Power Clampers manufactured by Shindengen is an electronic part, specifically a Zener Diode Power Zeners and Power Clampers power supply module. It is a single-phase type module with a rated output current of 7A. It is designed to provide a regulated output of 170V DC. It is suitable for use in audio-visual, communication, office automation, and other applications requiring a reliable source of power. This module is UL approved, and features a built-in over-current and over-voltage protection circuit. It also features a short-circuit protection circuit with auto-reset. In the event of an unexpected voltage or current spike, the module will shut down automatically.