This document describes the features and characteristics of Vishay Semiconductors' 1N4728A to 1N4764A series silicon planar power zener diodes, which are used in stabilizing and clipping circuits with high power ratings.
The Vishay 1N4728A to 1N4764A series are silicon planar power Zener diodes intended for voltage stabilization and clipping applications. The datasheet provides electrical, thermal, and mechanical specifications, as well as packaging options and compliance information.
Key features include a standard Zener voltage tolerance of ±5 %, lead‑free construction, and RoHS/WEEE compliance. The series is supplied in DO‑41 glass cases, with typical weight of about 310 mg per device, and is available on reels or ammo packs for automated assembly.
| Case type | DO‑41 glass case |
|---|---|
| Weight | approx. 310 mg |
| Maximum power dissipation | 1.31 W |
| Thermal resistance (junction‑to‑ambient) | 410 K/W |
| Maximum junction temperature | 175 °C |
| Storage temperature range | -65 °C to +175 °C |
| Typical Zener voltage (example part 1N4728A) | 3.3 V |
| Typical Zener voltage (example part 1N4764A) | 100 V |
They are supplied in a DO‑41 glass case.
The maximum power dissipation is 1.31 W.
Yes, they are lead‑free and comply with RoHS 2002/95/EC and WEEE 2002/96/EC.
The typical Zener voltage for 1N4730A is 3.9 V.