1N4625-1

Overview

The Microchip Technology 1N4625-1 is a 500 mW metallurgically bonded glass Zener diode in an axial-lead DO-35 package. It provides a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse leakage current of 5 µA at 3 V. Electrical characteristics include a test current of 250 µA, a maximum dynamic impedance of 1500 Ohms, and a noise density of 3 µV/√Hz.

Feature Summary

• Internal metallurgical bond construction for high reliability
• Hermetically sealed glass DO-35 axial-lead package
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge

Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability applications requiring MIL-PRF-19500/435 qualification
• Radiation-hardened circuit designs

Procurement Notes

Verify the specific reliability level required, as the base part number corresponds to commercial grade while JAN, JANTX, JANTXV, and JANS levels require distinct ordering suffixes. Confirm RoHS compliance status, noting that compliant versions are available only on commercial grades. Ensure the correct tolerance suffix matches the design requirements.

Selection Notes

Select this component for circuits requiring stable voltage reference or regulation in harsh environments. The wide operating temperature range supports extreme conditions. Consider the low capacitance characteristic for high-frequency applications. Verify power derating curves if ambient temperatures exceed standard limits.

Part Context

This device belongs to the 1N4614-1 through 1N4627-1 series of 500 mZener voltage regulators. The series offers voltages from 1.8 to 100 V with various tolerance options. These diodes are constructed with internal metallurgical bonds and are qualified up to the JANS level for demanding applications.

Replacement Considerations

Equivalent parts include JAN1N4625D-1 (1% tolerance) and JANTX1N4625C-1 (2% tolerance). Surface mount alternatives in the same family include 1N4625UR-1 in the DO-213AA package.

FAQ

What is the maximum noise density for the 1N4625-1?

The maximum noise density is 3 µV/√Hz at the specified test current.

How is polarity indicated on the DO-35 package?

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