JAN1N4121D-1/TR

Single Zener Diodes Overview

The JAN1N4121D-1/TR is a 500 mW metallurgically bonded glass Zener diode from the 1N4614–1N4627 series, qualified per MIL-PRF-19500/435. It features a nominal Zener voltage of 33 V with a tight ±1% tolerance (indicated by 'D'). The device operates in an axial-lead DO-35 package and includes a tape-and-reel option ('TR' suffix). Electrical characteristics include a maximum dynamic impedance of 0.01 Ohms at a test current of 250 µA, a maximum reverse leakage current of 25.1 µA at 22.8 V, and a noise density of 40 µV/√Hz.

Single Zener Diodes Feature Summary

• Hermetically sealed internal metallurgical bond for high reliability
• Qualified to JANS level for radiation-hardened applications
• Low noise density performance suitable for precision regulation
• Flexible axial-lead mounting terminals

Single Zener Diodes Applications

• Voltage regulation in military-grade electronic systems
• Precision reference circuits requiring low noise
• High-reliability aerospace power supplies
• Radiation-tolerant circuit protection

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required configuration: 'JAN' indicates the specific reliability level, 'D' confirms the 1% voltage tolerance, and 'TR' denotes the tape-and-reel packaging format. Confirm RoHS compliance status if applicable, as it varies by grade. Ensure the supplier provides documentation verifying the MIL-PRF-19500/435 qualification level before procurement.

Single Zener Diodes Selection Notes

Select this component when a 33 V Zener voltage with strict 1% tolerance is required in a through-hole axial package. The device is appropriate for designs needing radiation hardness or high thermal stability. Consider the 500 mW power dissipation limit and derating curves for thermal management. Verify that the 0.01 Ohm dynamic impedance meets the signal integrity requirements of the application.

Single Zener Diodes Part Context

This part belongs to the Microchip 1N4614–1N4627 series of 500 mW Zener diodes. These devices are available in various reliability levels including JAN, JANTX, JANTXV, and JANS. The series offers voltages ranging from 1.8 V to 100 V with tolerances of 5%, 2%, and 1%. They are constructed using metallurgically bonded glass technology in a DO-35 package.

Single Zener Diodes Replacement Considerations

Equivalent parts within the same series include JAN1N4121-1 (bulk) or JAN1N4121C-1 (2% tolerance). Cross-reference with other manufacturers' 1N4121 equivalents only if they meet the MIL-PRF-19500/435 specification and package dimensions.