1N4370AUR-1

Single Zener Diodes Overview

The Microchip Technology 1N4370AUR-1 is a silicon Zener diode in a DO-213AA MELF surface mount package. It provides a nominal voltage of 2.4 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features an internal metallurgical bond. Electrical characteristics include a maximum dynamic impedance of 30 Ohms at a test current of 155 mA, a reverse leakage current of 100 µA at 1 V, and a forward voltage of 1.1 V at 200 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed glass case with internal metallurgical bond for reliability
• Qualified per MIL-PRF-19500/127 standards for JAN, JANTX, and JANTXV levels
• Inherently radiation hard design suitable for harsh environments
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 method 1020

Single Zener Diodes Applications

• Voltage regulation over broad temperature and current ranges
• High density mounting using surface mount technology
• Radiation-hardened electronic systems

Single Zener Diodes Procurement Notes

Verify the specific qualification level required, as the part is available in JAN, JANTX, and JANTXV variants. Confirm RoHS compliance status if applicable, noting that commercial grade versions may differ from military qualified parts. Ensure the ordering suffix matches the desired tolerance and environmental rating specifications.

Single Zener Diodes Selection Notes

Select this component for applications requiring a low-voltage reference or regulator in a compact surface mount form factor. Consider the negative temperature coefficient of approximately -0.085 %/°C when designing circuits sensitive to thermal drift. Verify that the power dissipation requirements align with the derating curves provided for the operating environment.

Single Zener Diodes Part Context

This device belongs to the 1N4370AUR-1 through 1N4372AUR-1 series of 500 mW Zener diodes. These components are JEDEC registered equivalents to the 1N746 through 1N759A series. They serve as surface mount replacements for axial-leaded counterparts like the 1N4370A-1, maintaining similar electrical performance in a smaller footprint.

Single Zener Diodes Replacement Considerations

Commercial equivalents previously identified with CDLL or MLL prefixes are functionally similar but lack military qualification. Axial-leaded versions such as the 1N4370A-1 offer identical electrical parameters but require different mounting techniques.