1N3344B

Single Zener Diodes Overview

The Microchip Technology 1N3344B 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 and a maximum dynamic impedance of 50 Ohms. The device features a hermetically sealed DO-5 (DO-203AB) metal and glass case with an 11/16 inch hexagonal stud. It operates within a junction 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 for environmental protection
• Internal solder bond design for mechanical reliability
• Standard polarity configuration with anode connected to the case
• Radiation hard characteristics suitable for harsh environments

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify the specific revision level and manufacturing origin when sourcing this component. Confirm that the supplier provides documentation regarding the hermetic seal integrity and internal solder bond quality. Ensure the procurement specifications align with the required military or commercial qualification levels if applicable to your system design constraints.

Single Zener Diodes Selection Notes

Select this component for applications requiring high power dissipation capabilities in a ruggedized package. Consider the thermal resistance of 2.0°C/W maximum when designing heat sinking solutions. Evaluate the need for reverse polarity variants by checking for the 'R' suffix designation if cathode-to-case connection is required for your circuit topology.

Single Zener Diodes Part Context

This part belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi, now part of Microchip Technology. These devices are designed for demanding applications where standard plastic packages cannot handle the thermal load. The series offers a broad voltage range from 3.9 V to 200 V in a standardized industry DO-5 package.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N4549B through 1N4556B series which share identical electrical characteristics and physical dimensions. Verify compatibility with JAN, JANTX, or JANTXV qualified versions if military screening standards are mandated for your specific application requirements.