1N4113UR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4113UR-1/TR is a 500 mW metallurgically bonded glass surface mount Zener diode in the DO-213AA package. Qualified per MIL-PRF-19500/435, it offers a nominal Zener voltage of 18 V at a test current of 250 µA. The device features a maximum dynamic impedance of 0.05 Ω and a reverse leakage current of 13.7 µA. It operates within a junction temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA MELF package with internal metallurgical bond
• Qualified for JAN, JANTX, JANTXV, and JANS reliability levels
• Low noise density performance suitable for precision regulation
• Inherently radiation hard design

Single Zener Diodes Applications

• Voltage regulation over broad current and temperature ranges
• High-reliability military and aerospace circuits
• Radiation-hardened electronic systems

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as the base part number covers multiple qualification grades. Confirm RoHS compliance status if applicable, noting that compliant versions are commercially graded only. Ensure the TR suffix indicates tape and reel packaging per EIA-481-1-A standards before ordering.

Single Zener Diodes Selection Notes

Select this component for applications requiring hermetic sealing and high thermal stability in a surface-mount form factor. Consider the positive temperature coefficient of 0.090 %/°C for circuit compensation needs. Evaluate the low dynamic impedance for stable regulation under varying load conditions compared to standard commercial equivalents.

Single Zener Diodes Part Context

This device belongs to the 1N4099UR-1 through 1N4135UR-1 series of 500 mZener diodes. It serves as the surface-mount equivalent to the axial-leaded 1N4113-1 in the DO-35 package. The series provides extensive voltage selection from 1.8 V to 100 V with various tolerance options.

Single Zener Diodes Replacement Considerations

The CDLL4113-1 is the commercial designation for this device family. For axial leaded replacements, consider the 1N4113-1. Verify that any substitute matches the DO-213AA footprint and MIL-PRF-19500/435 qualification requirements.

Single Zener Diodes FAQ

What is the polarity marking on the 1N4113UR-1?

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

How does the power dissipation derate?

The 0.5 W rating linearly derates starting at an end-cap temperature of 125°C and goes to zero at 175°C.