MM3Z27VT1G

The MM3Z27VT1G is a Zener voltage regulator diode from ON Semiconductor’s MM3ZxxxT1G series. It provides a nominal Zener voltage of 27V with a tolerance of ±5%, making it suitable for voltage regulation and protection in compact electronic designs. The device is rated for a maximum power dissipation of 300mW at 25°C ambient temperature on a standard FR-4 PCB, with a derating factor of 2.4 mW/°C above 25°C. Key electrical characteristics include a maximum impedance of 80 Ω at the Zener test current and a low reverse leakage current of 50 nA at 18.9V. The forward voltage is typically 900 mV at 10 mA.

Designed for surface mount assembly, the MM3Z27VT1G is packaged in a SOD-323 (SC-76) case with a small body outline of 1.7 mm x 1.25 mm and a low height of 0.9 mm. The package is Pb-free and has a UL 94 V-0 flammability rating. The device has an operating temperature range of -65°C to 150°C and a thermal resistance from junction to ambient of 416 °C/W. These features make it ideal for space-constrained applications such as cellular phones, handheld portables, and high-density PC boards.

The MM3Z27VT1G is also available in tape and reel packaging for automated assembly, though specific reel quantities are not verified. The device is part of a series covering Zener voltages from 2.4V to 75V, offering design flexibility. For automotive applications, the SZ-prefix variant is available with AEC-Q101 qualification. This standard version is suitable for general purpose voltage regulation and ESD protection.