1N4109

Single Zener Diodes Overview

The Microchip Technology 1N4109 is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 15 V with a tight tolerance of ±5%. The device operates in the through-hole DO-35 axial package and supports a maximum DC power dissipation of 500 mW at +50°C. Key electrical characteristics include a maximum reverse leakage current of 50 nA, a Zener impedance of 100 Ohms, and a test current of 250 µA. It functions reliably across an extended temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation at a nominal 15 V level
• Features low reverse leakage current for precision circuit stability
• Constructed with metallurgically bonded silicon for durability
• Supports operation in high-temperature environments up to 175°C

Single Zener Diodes Applications

• Precision voltage reference circuits
• Overvoltage protection stages
• Low-noise signal conditioning systems

Single Zener Diodes Procurement Notes

Verify that the specific order suffix matches the required package style (DO-35) and tolerance grade. Confirm RoHS compliance status as standard versions may not meet environmental directives. Ensure the manufacturer designation aligns with Microchip Technology specifications rather than legacy Microsemi or other sources when sourcing replacement components.

Single Zener Diodes Selection Notes

Select this component when a 15 V regulation point is required with strict leakage limits. The DO-35 package suits through-hole designs requiring robust mechanical mounting. Consider the 100 Ohm impedance for noise-sensitive applications where lower dynamic resistance is unnecessary. Verify thermal derating requirements if ambient temperatures exceed 50°C.

Single Zener Diodes Part Context

This part belongs to the 1N4099 through 1N4135 series of low-current Zener diodes. These devices are characterized by low noise and low reverse leakage, making them suitable for sensitive analog front ends. The series is available in various military and commercial grades, including JAN and JANTX variants, adhering to MIL-PRF-19500/435 standards.

Single Zener Diodes Replacement Considerations

Direct substitutes include the 1N3522A and 1N5535B from Microchip Technology. Verify pinout compatibility and ensure the alternative meets the 15 V ±5% specification and 500 mW power rating.