MMSZ5230BT1G

The MMSZ5230BT1G is a Zener voltage regulator diode from ON Semiconductor's MMSZ52xxxT1G series. It provides a nominal zener voltage of 4.7V with a tolerance of ±5% and is capable of dissipating up to 500mW of power on FR-5 board when the lead temperature is maintained at 75°C. The device features a maximum forward voltage of 900mV at 10mA test current and a maximum reverse leakage current of 5µA at 2V. Its maximum zener impedance is 19Ω.

The diode is housed in a compact surface-mount SOD-123 package designed for automated board assembly. It operates over a junction temperature range of -55°C to 150°C, with a thermal resistance junction-to-ambient of 340°C/W and junction-to-lead of 150°C/W. The device carries an ESD rating of Class 3 (>16kV) per the Human Body Model, making it suitable for environments with electrostatic discharge concerns. The case material is UL 94 V-0 rated for flammability.

This component is appropriate for general-purpose voltage regulation, overvoltage protection, and reference voltage generation in low-power circuits. The SOD-123 footprint allows for high-density mounting on printed circuit boards. The series also includes automotive-qualified SZ-prefix variants.