1. Device/Product Information

️· Products Covered: This document covers a variety of Zener diodes:
- 1N5518BUR-1 through 1N5546BUR-1
- CDLL5518 through CDLL5546D
️· Manufacturer: Microsemi
️· Location: 6 Lake Street, Lawrence, Massachusetts 01841
️· Website: http://www.microsemi.com

2. Specifications & Performance Characteristics

️· Zener Voltage (VZ): This is the breakdown voltage of the diode. It's the voltage at which the diode begins to conduct significantly. Tolerances depend on suffix:
- No Suffix: +20%
- "A" Suffix: +10%
- "B" Suffix: +5.0%
- "C" Suffix: +2.0%
- "D" Suffix: +1.0%
️· Reverse Leakage Current (lR): This is the small current that flows in the reverse direction. The values are specified in a table for various part numbers.
️· Forward Voltage (VF): Not explicitly detailed, but implied to be part of the "six parameters" for which "B," "C," and "D" suffixes provide limits.
️· Zener Impedance: Derived by superimposing a 60Hz a.c. current equal to 10% of the Zener current (IZT). Specific impedance values are presented in a graph labeled “Zener Impedance vs. Operating Current”.
️· Operating Current (IZT): Specified in a graph, it ranges from approximately 0.1mA to 100mA
️· Power Derating: A graph illustrates how the maximum power dissipation varies with junction temperature.

3. Physical Dimensions

The following table outlines the physical dimensions in both millimeters and inches.

DIM	MIN (mm)	MAX (mm)	MIN (inch)	MAX (inch)
D	1.60	1.70	0.063	0.067
F	0.41	0.55	0.016	0.022
G	3.30	3.70	0.130	0.146
G1	2.54 REF	2.54 REF	0.100 REF	0.100 REF
S	0.03 MIN	0.03 MIN	0.001 MIN	0.001 MIN

4. Important Notes & Definitions

️· ΔVZ: The maximum difference between VZ at IZT and VZ at IZL. (Defines a range in Zener voltage depending on the current level.)
️· REF: "Reference" dimension - a dimension that is typically controlled.
️· MIN/MAX: Minimum and Maximum dimensions
️· IZT: Zener current
️· IZL: Low Zener current

5. Graphs/Diagrams

The document includes the following graphs/diagrams:

️· Power Derating Curve: Illustrates how maximum power dissipation varies with junction temperature.
️· Zener Impedance vs. Operating Current: A graph showing the impedance of the Zener diodes at various operating currents.

This summary provides a comprehensive understanding of the information contained within the provided text.