The BZT52C27S is a Zener diode SOD-323 RoHS manufactured by Formosa. It is a small-size, two-terminal, surface mount component. It is designed for general purpose, low voltage operation and stable voltage regulation. It has an operating temperature range of -55°C to +150°C, and a maximum voltage rating of 27 V and a maximum power dissipation rating of 500 mW. It is RoHS (Restriction of Hazardous Substances) compliant, meaning it does not contain any hazardous or toxic materials.