This document describes the features and applications of the Silicon 500 mW Zener Diodes product series manufactured by Microsemi Scottsdale Division. The product series includes models 1N746 to 1N759A and 1N4370 to 1N4372A, which regulate voltage over a broad operating current and temperature range. It offers various specifications and certification options.
The Microsemi 1N746‑1N759A and 1N4370‑1N4372A series are 0.5 W glass axial‑lead Zener diodes in a DO‑35 (DO‑204AH) package. They provide selectable Zener voltages from 2.4 V to 12 V with standard 5 % or 10 % tolerances, and tighter tolerances using suffix letters.
These devices operate over a wide temperature range (‑65 °C to +175 °C) and include options such as internal metallurgical bond (‑1 suffix) and military‑grade screening (JAN, JANTX, JANTXV). Electrical characteristics, mechanical dimensions, and packaging details are provided for design and reliability assessment.
| Power rating | 0.5 W |
|---|---|
| Voltage range | 2.4 V – 12 V |
| Voltage tolerance | ±5 % (standard), ±10 % (no suffix), ±2 % (C suffix), ±1 % (D suffix) |
| Operating temperature | -65 °C to +175 °C |
| Thermal resistance | 250 °C·W⁻¹ (junction‑to‑lead) |
| Forward voltage @200 mA | 1.1 V |
| Maximum solder temperature | 260 °C for 10 s |
| Package type | DO‑35 (DO‑204AH) axial‑lead glass |
| Weight | 0.2 g |
Each diode is rated for 0.5 W steady‑state power dissipation.
They operate from –65 °C up to +175 °C.
Suffix letters C and D on the part number denote ±2 % and ±1 % tolerances respectively.
They are supplied in a hermetically sealed axial‑lead glass DO‑35 (DO‑204AH) package.