CDLL821-829 series are double anode zener diodes with the rated zener voltage of 5.9V to 6.9V. The maximum operating temperature is 175°C and the maximum DC power dissipation is 500mW @ +50°C.
This document describes CDI's temperature‑compensated Zener diodes offered in the 1N821UR‑1 through 1N829UR‑1 series and the CDLL821 through CDLL829A series. The parts feature leadless surface‑mount packages and are designed for a wide operating temperature range.
Key electrical ratings include operating and storage temperatures of –65 °C to +175 °C, a maximum power dissipation of 500 mW at +50 °C, and a power‑derating slope of 4 mW/°C above +50 °C. Nominal Zener voltages are 6.2 V and 6.55 V, with low Zener impedance values (e.g., 0.01 Ω for CDLL821). Reverse leakage current is specified as 2 µA at 25 °C with a 3 V reverse bias.
| Operating Temperature | -65°C to +175°C |
|---|---|
| Storage Temperature | -65°C to +175°C |
| DC Power Dissipation | 500 mW @ +50°C |
| Power Derating | 4 mW/°C above +50°C |
| Reverse Leakage Current | 2 µA @ 25°C, Va = 3 V |
| Nominal Zener Voltage | 6.2 V and 6.55 V |
The diodes operate from –65 °C to +175 °C.
The maximum power dissipation is 500 mW at +50 °C.
Nominal Zener voltages are 6.2 V and 6.55 V.
Power derates at a rate of 4 mW per °C above +50 °C.