1N3344A

Single Zener Diodes Overview

The Microchip Technology 1N3344A is a high-power 50 W Zener diode from the JEDEC registered 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 130 V at a test current of 95 mA. The device features a maximum dynamic impedance of 50 Ohms and a maximum reverse current of 10 µA. It operates within a junction and storage temperature range of -65°C to +175°C, dissipating up to 50 watts at a case temperature below 75°C.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction with internal solder bond for reliability
• Standard polarity connects anode to case; reverse polarity available via suffix designation
• Inherently radiation hard as described in Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• High power voltage regulation circuits
• Military and aerospace electronic systems
• Industrial equipment requiring robust thermal performance

Single Zener Diodes Procurement Notes

Verify the specific tolerance suffix required for your design, as the 'B' suffix indicates a 5% Zener voltage tolerance while other suffixes denote different tolerances or reverse polarity configurations. Confirm that the application environment supports the DO-5 package mounting requirements and adequate heat sinking to manage the 50-watt power dissipation rating effectively.

Single Zener Diodes Selection Notes

Select this component when designing circuits that require high power handling capabilities and strict voltage regulation stability under varying thermal conditions. Ensure the system layout accommodates the hexagonal stud mounting hardware and verify that the operating current remains within the specified limits to maintain the rated power dissipation without exceeding thermal constraints.

Single Zener Diodes Part Context

This part belongs to the 1N3305 through 1N3350B series of 50-watt Zener diodes manufactured by Microchip Technology's Scottsdale Division. These devices are designed for demanding applications where high power dissipation and long-term reliability are critical. The series offers a broad selection of voltages ranging from 3.9 V to 200 V.

Single Zener Diodes Replacement Considerations

Equivalent parts include JAN1N3344B and JANTX1N3344B, which offer military qualifications per MIL-PRF-19500/358. Verify compatibility regarding polarity configuration and mechanical mounting dimensions before substitution.