# CDI Zener Diodes (CDLL3821 - CDLL3828A) & 1N3821AUR-1 thru 1N3828AUR-1

## General Description

️· Hermetically sealed glass case (MELF, LL41)
️· Lead Finish: Tin / Lead
️· Double plug construction
️· Metallurgically bonded
️· Available in JAN, JANTX, and JANTXV per MIL-PRF-19500/115
️· Leadless package for surface mount

## Physical Characteristics

️· Case: DO-213AB
️· Dimensions (millimeters/inches):
- D: 2.39 - 2.66 / 0.094 - 0.105
- F: 0.41 - 0.55 / 0.016 - 0.022
- G: 4.80 - 5.20 / 0.189 - 0.205
- G1: 4.11 REF. / 0.159 REF.
- S: 0.03 MIN. / 0.001 MIN.

## Electrical Characteristics

️· Operating Temperature: -65°C to +175°C
️· Storage Temperature: -65°C to +175°C
️· DC Power Dissipation: 1 watt @ +TEC = 125°C
️· Power Derating: 20 mW / °C above TEC = 125°C
️· Forward Voltage @ 200mA: 1.2 volts maximum
️· Polarity: Banded (cathode) end positive

## Zener Voltage and Impedance (typical values for CDLL3821 - CDLL3828A)

Zener Voltage (V)	Zener Impedance (Ohms)
3.3	10
3.6	10
3.9	9
4.3	9
4.7	8
5.1	7
5.6	5
6.2	2

️· Tolerance:
- Standard: +10%
- Suffix "A": +5%
- Suffix "C": +2%
- Suffix "D": +1%

## Mounting Considerations

️· Coefficient of expansion: +6PPM/°C. Mounting surface should be selected to match.

## Contact Information

️· 22 Corey Street, Melrose, MA 02176
️· Phone: (781) 665-1071
️· Website: http://www.cdi-diodes.com