The BZT52C12S is an SOD-323-packaged Zener diode manufactured by High Diode. It is RoHS compliant and has a low profile design for through-hole mounting. The breakdown voltage is 12 V, with a Zener voltage tolerance of ±5%. It has a power rating of 500 mW, a junction temperature of -55°C to +150°C, and a maximum reverse voltage of 12 V. The diode is suitable for use in a wide range of applications, from general purpose to high-powered, including in automotive electronics and industrial uses.