This document describes the features and characteristics of the Silicon 5 Watt Zener Diodes produced by Microsemi Scottsdale Division, including the voltage regulation range, tolerances, moisture classification, etc.
The 1N5333B‑1N5388B series are JEDEC‑registered axial‑lead 5 W Zener diodes offered by Microsemi. They cover a voltage range of 3.3 V to 200 V and are available with tolerance designations B (±5 %), A (±10 %), C (±2 %) and D (±1 %). The devices are packaged in plastic, classified as Level 1 moisture resistant, and can be ordered with military screening prefixes.
Key electrical characteristics include a power dissipation of 5 W at 25 °C, an operating temperature range of –65 °C to +150 °C, and a thermal resistance of 25 °C/W (junction‑to‑lead). Maximum regulator current reaches up to 5 A for the B‑suffix devices, and the diodes feature low voltage regulation (ΔVZ) and high surge current capability.
| Voltage range | 3.3 V to 200 V |
|---|---|
| Power dissipation (25 °C) | 5.0 W |
| Operating temperature | -65 °C to +150 °C |
| Thermal resistance | 25 °C/W junction‑to‑lead |
| Standard voltage tolerance (B suffix) | ±5 % |
They are available with Zener voltages from 3.3 V up to 200 V.
Each device can dissipate 5.0 W at a case temperature of 25 °C.
The suffix letter on the part number defines tolerance: B = ±5 %, A = ±10 %, C = ±2 %, D = ±1 %.