CDLL5943D

Single Zener Diodes Overview

The CDLL5943D is a surface-mountable 1.5 W Zener diode in the JEDEC DO-213AB package, equivalent to the 1N5943B series. It provides a nominal Zener voltage of 56 V with a test current of 6.7 mA and dynamic impedance of 0.25 Ohms. The device features a reverse current of 1.0 µA at 42.6 V and supports a maximum DC current of 26 mA. Operating temperatures range from -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass package with metallurgically enhanced internal contacts for high reliability.
• Leadless design suitable for high-density surface mounting applications.
• Inherently radiation hard construction.

Single Zener Diodes Applications

• Voltage regulation over broad ranges of operation current and temperature.
• High density circuit designs requiring low parasitic characteristics.
• High reliability applications subject to source control drawings or MIL-PRF-19500 screening.

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against the manufacturer's nomenclature guide to confirm tolerance levels (e.g., 'D' indicates 1% tolerance) and RoHS compliance status. Confirm whether the required variant includes MIL-PRF-19500 screening options if high-reliability standards are mandated for the project.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed, leadless surface-mount Zener diode is required for high-reliability environments. Ensure the 56 V breakdown voltage aligns with the circuit design requirements. Consider the thermal resistance values and power derating curves for proper heat dissipation on FR4 PCBs.

Single Zener Diodes Part Context

This part belongs to the 1N5913BUR-1 through 1N5956BUR-1 series, also identified as CDLL5913 through CDLL5956. These devices are available in various packages including DO-41 axial-leaded, SMB, SMAJ, and Powermite configurations, offering flexibility for different mounting and power handling needs within the same electrical family.

Single Zener Diodes Replacement Considerations

Direct equivalents include the 1N5943B and 1N5943BUR-1. Verify that substitute components match the DO-213AB MELF package dimensions and maintain the required 1% voltage tolerance specification.