1N3319BE3

Overview

The Microchip Technology 1N3319BE3 is a high-power 50 W Zener diode belonging to the JEDEC registered 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 20 V at a test current of 630 mA. The device features a maximum dynamic impedance of 2.4 ohms and a typical temperature coefficient of +0.075 %/°C. 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.

Feature Summary

• Hermetically sealed welded metal and glass construction for durability
• Internal solder bond design ensuring robust electrical connections
• Standard polarity configuration with anode connected to the case
• Inherently radiation hard characteristics suitable for harsh environments

Applications

• Voltage regulation in power supplies requiring broad operating ranges
• Protection circuits in aerospace and defense systems
• Industrial control applications utilizing high power dissipation capabilities

Procurement Notes

Verify the specific suffix requirements when ordering, as the 'E' designation indicates environmental screening beyond standard commercial specifications. Confirm that the required tolerance aligns with the 'B' suffix, which denotes a +/- 5% Zener voltage tolerance. Ensure mounting hardware supports the DO-5 package hexagonal stud dimensions for proper thermal management and mechanical stability during installation.

Selection Notes

Select this component for applications demanding high power handling and strict voltage regulation under varying thermal conditions. The 20 V nominal rating and low dynamic impedance make it suitable for stable reference applications. Consider the positive temperature coefficient for designs where voltage increases with heat. Verify that the system can accommodate the physical size and mounting requirements of the DO-5 package.

Part Context

This part belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These devices are designed for high-reliability applications and are also available in JAN, JANTX, and JANTXV military qualifications. The series covers a wide voltage range from 3.9 V to 200 V, offering versatile options for various power regulation needs across different industries.

Replacement Considerations

Direct substitutes include other parts within the 1N3305-1N3350B series or the equivalent 1N4549B-1N4556B series. Military qualified versions such as JAN1N3319B or JANTX1N3319B offer enhanced screening but maintain identical electrical characteristics. Ensure any replacement matches the DO-5 package and polarity configuration.