1N3030B-1/TR

Overview

The Microchip Technology 1N3030B-1/TR is a 1-watt glass case Zener diode with a nominal voltage of 27 volts and a 5% tolerance. It operates within a temperature range of -55°C to +175°C, featuring a maximum reverse leakage current of 10 µA at 20 volts and a dynamic impedance of 35 ohms at the test current of 9.5 mA. The device utilizes a hermetically sealed DO-41 package with tungsten slugs and metallurgically bonded terminals.

Feature Summary

• Hermetically sealed glass construction with tungsten slugs for high-reliability environments
• Metallurgically bonded terminals ensuring robust mechanical integrity
• Double plug construction designed for stable breakdown characteristics

Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability applications requiring radiation hardness
• Circuits demanding low reverse leakage currents

Procurement Notes

Verify that the specific ordering suffix matches the required RoHS compliance status, as commercial versions may differ from military qualifications. Confirm the tape and reel packaging aligns with standard EIA-296 specifications if automated assembly is intended. Ensure the procurement documentation references the correct MIL-PRF-19500/115 qualification level corresponding to the JAN or JANTX variant.

Selection Notes

Select this component when a 27-volt reference with 5% tolerance is required in a through-hole glass package. Consider the 1-watt power dissipation limit and the -55°C to +175°C operating range for thermal design. Evaluate the 35-ohm dynamic impedance against circuit sensitivity requirements. Verify compatibility with existing leaded mounting processes and soldering temperatures up to 260°C.

Part Context

This part belongs to the 1N3016B-1 through 1N3045B-1 series of 1-watt Zener diodes registered with JEDEC. The series provides a wide selection of voltages from 6.8 to 110 volts in the same DO-41 glass package. The 1N3030B-1 specifically addresses the 27-volt segment of this established lineup, offering consistent performance across the broader family.

Replacement Considerations

Direct replacements include other manufacturers' 1N3030 equivalents meeting the same electrical parameters. Cross-reference with 1N3030B variants for identical 5% tolerance. Ensure any substitute maintains the DO-41 package dimensions and hermetic sealing capabilities for equivalent reliability.