JAN1N973B-1

Single Zener Diodes Overview

The JAN1N973B-1 is a silicon Zener diode with a nominal voltage of 33V and a 5% tolerance. It operates within a temperature range of -65°C to +175°C and features a hermetically sealed glass DO-35 package. The device provides a steady-state power dissipation of 0.5W at a lead temperature of +50°C, with a maximum DC Zener current of 12mA. Electrical characteristics include a test current of 3.8mA, a dynamic impedance of 58 Ohms, and a maximum reverse leakage current of 25µA.

Single Zener Diodes Feature Summary

• Hermetically sealed axial-lead glass construction with an internal metallurgical bond for high reliability.
• Qualified per MIL-PRF-19500/117 standards for JAN, JANTX, and JANTXV levels.
• Inherently radiation hard as described in Microsemi MicroNote 050.
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 method 1020.

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges.
• Reference voltage sources in military and aerospace circuits.
• Overvoltage protection in harsh environments.

Single Zener Diodes Procurement Notes

Verify the specific qualification level required, as JAN, JANTX, and JANTXV options exist for this part number series. Confirm RoHS compliance status, noting that commercial versions may differ from military qualified units. Ensure ordering suffixes match the desired tolerance and packaging configuration. Consult factory documentation for upscreening availability if necessary.

Single Zener Diodes Selection Notes

Select based on the required Zener voltage tolerance, where B indicates ±5%, C indicates ±2%, and D indicates ±1%. Consider the thermal resistance values when designing PCB layouts or heat sinking. Verify that the application current remains within the specified IZT and IZM limits to ensure stable breakdown characteristics and prevent overheating.

Single Zener Diodes Part Context

This component belongs to the 1N957B-1 through 1N992B-1 series of 0.5-watt Zener voltage regulators manufactured by Microchip Technology. The series offers a wide selection of voltages from 6.8V to 200V in standard axial-lead packages. These devices are designed for high-reliability applications requiring robust performance under extreme conditions.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other parts within the 1N957B-1 to 1N992B-1 series that share identical electrical parameters and package dimensions. Cross-reference specific tolerance suffixes (B, C, D) to ensure voltage accuracy matches the original design requirements.