1N4624-1/TR

Overview

The Microchip Technology 1N4624-1/TR is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 4.7 V with a standard tolerance of ±5%. The device operates at a test current of 250 µA, featuring a maximum dynamic impedance of 1550 Ohms and a maximum reverse leakage current of 5 µA at 3 V. It supports an operating temperature range from -65 °C to +175 °C.

Feature Summary

• Hermetically sealed construction using internal metallurgical bonding for high reliability.
• Qualified per MIL-PRF-19500/435 standards for JAN, JANTX, JANTXV, and JANS levels.
• Low noise density performance suitable for sensitive signal applications.
• Inherently radiation hard design compliant with Microsemi MicroNote 050.

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required qualification level and packaging format. Confirm RoHS compliance status as it varies by grade. Ensure the component meets the necessary environmental specifications for the intended application environment before finalizing procurement.

Selection Notes

Select this component when a hermetically sealed, low-current Zener regulator is required. The 4.7 V rating and ±5% tolerance suit general precision regulation tasks. Consider the 500 mW power dissipation limit and thermal derating requirements for the specific mounting conditions.

Part Context

This part belongs to the 1N4614-1 through 1N4627-1 series of 500 mW Zener diodes. These devices are JEDEC registered and offer voltages ranging from 1.8 V to 100 V. They are available in various tolerance grades and reliability levels, including commercial and military specifications.

Replacement Considerations

Equivalent parts within the same series include 1N4623-1 and 1N4625-1. Verify that any substitute maintains the required Zener voltage, power rating, and package compatibility.

FAQ

What is the maximum noise density for this device?

The maximum noise density is specified at 3.0 µV/√Hz at the test current of 250 µA.

How is polarity indicated on the package?

Polarity is indicated by a band on the cathode end of the glass body.