1SMA5934BT3

The 1SMA5934BT3 is a 24V Zener diode from On Semiconductor, part of the 1SMA59xxBT3G series of 1.5 Watt plastic surface mount Zener voltage regulators. It offers a nominal Zener voltage of 24V with a tolerance of ±5%, making it suitable for voltage regulation and clamping applications.

Electrically, the device has a maximum Zener impedance of 19Ω at the test current. It features a low reverse leakage current of 500 nA at 18.2V. The forward voltage is 1.2V maximum at 200mA (per datasheet). The device is ESD rated to Class 3 (>16 kV) per Human Body Model, providing robust protection.

The diode is packaged in a DO-214AC (SMA) case, designed for surface mount assembly. It is supplied in tape and reel packaging with a standard quantity of 5000 pieces per reel. The power dissipation is 1.5W at a lead temperature of 75°C (zero lead length) and derates above that temperature at 20 mW/°C. At ambient temperature of 25°C on FR-4 board, dissipation is 0.5W with derating of 4 mW/°C. The junction-to-lead thermal resistance is 50°C/W, and junction-to-ambient is 250°C/W.

The operating and storage temperature range is -65°C to 150°C. The device is Pb-free and RoHS3 compliant (though RoHS status is unverified from existing database). The case material has a flammability rating of UL 94 V-0. This diode is suitable for use in voltage regulation, overvoltage protection, and reference voltage circuits.