1N4111

Single Zener Diodes Overview

The Microchip Technology 1N4111 is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 package. It provides a nominal Zener voltage of 17 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65 °C to +175 °C. Electrical characteristics include a maximum reverse current of 13 µA at 15.3 V, a dynamic impedance of 100 Ohms, and a noise density of 40 µV/√Hz. Maximum regulator current is rated at 22 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed construction utilizing an internal metallurgical bond for high reliability.
• Qualified per MIL-PRF-19500/435 standards across JAN, JANTX, JANTXV, and JANS 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 ranges of current and temperature
• High reliability applications requiring MIL-qualified components
• Radiation-hardened electronic systems

Single Zener Diodes Procurement Notes

Verify the specific reliability level required (JAN, JANTX, JANTXV, or JANS) when ordering, as this affects qualification status. Confirm RoHS compliance requirements, noting that commercial versions may differ from military-grade specifications. Ensure the correct suffix is selected if tape and reel packaging is needed instead of bulk. Validate lead plating options against solderability standards.

Single Zener Diodes Selection Notes

Select the 1N4111 for applications requiring a precise 17 V reference with low dynamic impedance. Consider the negative temperature coefficient for voltages below 6.8 V and positive coefficients above. Evaluate power derating curves for ambient temperatures exceeding 25 °C. Verify that the DO-35 package dimensions fit the mechanical constraints of the target assembly.

Single Zener Diodes Part Context

The 1N4111 belongs to the JEDEC registered 1N4099 through 1N4135 series of 500 mZener diodes. These devices are manufactured by Microchip Technology (formerly Microsemi) and are designed for robust performance in demanding environments. The series offers extensive voltage selection from 1.8 V to 100 V with various tolerance options.

Single Zener Diodes Replacement Considerations

Equivalent parts include JAN1N4111D-1 and 1N5537D. Verify compatibility regarding package style, voltage tolerance, and qualification level before substitution.

Single Zener Diodes FAQ

What is the temperature coefficient of the 1N4111?

The temperature coefficient of the 1N4111 is +0.090 %/°C.

How is the polarity indicated on the 1N4111?

Polarity is indicated by a band on the cathode end. The diode must be operated with the banded end positive with respect to the opposite end for Zener regulation.