MMSZ5259BT1G

• 39V Zener Voltage with ±5% Tolerance
• 500mW Maximum Power Dissipation
• 80Ω Impedance at 10mA Zener Current
• 900mV Forward voltage, 100nA Maximum Reverse Leakage Current
• 2-Pin SOD-123 package, 2.69mm X 1.6mm, 1.12mm Height
• -55°C to 150°C Operating range, Lead free, RoHS compliant, Tape and Reel

The MMSZ5259BT1G is a single Zener Diode from onsemi with a 39V Zener voltage and ±5% tolerance, supplied in a 2-pin SOD-123 surface-mount package. It dissipates up to 500mW, has 80Ω impedance at a 10mA Zener current, and shows a 900mV forward voltage with 100nA maximum reverse leakage. The MMSZ5259BT1G is lead free, RoHS compliant, supplied on tape and reel, and rated from -55°C to 150°C.

Zener Diodes conduct in reverse at a defined breakdown voltage, which makes them the simplest way to establish a voltage reference, clamp a node or provide overvoltage protection on a rail. A 39V part with 500mW dissipation is aimed at higher-voltage housekeeping duties such as clamping a 24V or 36V industrial supply, protecting gate drives, or setting a bias point in a discrete circuit. The 5% tolerance suits protection and clamping rather than precision reference applications, where a dedicated reference IC would be used instead. It is a commodity part specified by industrial, power supply and automotive designers and bought in reel quantities.