1N4122-1

Single Zener Diodes Overview

The Microchip Technology 1N4122-1 is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 36 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and features a maximum dynamic impedance of 200 Ohms at a test current of 250 µA.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using an internal metallurgical bond for high reliability.
• Qualified per MIL-PRF-19500/435 standards for JAN, JANTX, JANTXV, and JANS levels.
• Capable of regulating voltage across broad ranges of current and temperature variations.

Single Zener Diodes Applications

• High-reliability voltage regulation circuits
• Military and aerospace electronic systems
• Precision reference voltage generation

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required qualification level, as commercial versions differ from military grades. Confirm RoHS compliance status if environmental regulations apply, noting that compliant options are available only on commercial grade parts. Ensure the component meets the necessary MIL-PRF-19500/435 requirements for your application environment.

Single Zener Diodes Selection Notes

Select this component when a stable 36 V reference is needed in harsh environments. The DO-35 package supports through-hole mounting. Consider the power derating curve for thermal management above 50°C. Verify that the ±5% tolerance aligns with circuit precision requirements before finalizing the design.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mW Zener diodes manufactured by Microchip Technology. These devices share common packaging and manufacturing processes but vary in nominal voltage ratings from 1.8 V to 100 V. The series is designed for applications requiring robust performance under extreme conditions.

Single Zener Diodes Replacement Considerations

JAN1N4122C-1 serves as a parameter-equivalent substitute offering tighter ±2% voltage tolerance.

Single Zener Diodes FAQ

What is the maximum noise density specification for this device?

The maximum noise density is specified as 40 μV/√Hz for Zener voltages of 6.8 V and higher.

How does the power dissipation rating change with temperature?

The rated average power dissipation of 0.5 W must be linearly derated starting at a lead temperature of 50°C, reaching zero at 175°C.