1N4623-TP

Overview

The 1N4623-TP is a discontinued single Zener diode manufactured by Micro Commercial Components (MCC). It features a nominal Zener voltage of 4.3 V with a tolerance of ±5%. The device is rated for a maximum steady-state power dissipation of 500 mW and operates within a junction temperature range up to 175°C. It utilizes a hermetically sealed glass DO-35 axial package with double slug construction. Electrical characteristics include a maximum forward voltage of 1.1 V at 200 mA, a reverse leakage current of 4 µA at 2 V, and a maximum Zener impedance of 1600 Ohms.

Feature Summary

• Double slug type construction with metallurgical bonding for enhanced reliability
• Hermetically sealed glass DO-35 package designed for through-hole mounting
• Lead-free finish compliant with RoHS directives

Applications

• Voltage regulation in low-power electronic circuits
• Reference voltage generation for analog signal processing
• Overvoltage protection for sensitive semiconductor components

Procurement Notes

This component has been officially declared obsolete and is no longer in manufacturing. Procurement must rely on existing surplus stock or authorized distributors holding legacy inventory. Verify part authenticity carefully due to the high risk of counterfeiting associated with discontinued items. Ensure that any available units match the original MCC specifications before integration into designs.

Selection Notes

Designers should transition to active replacement parts as this component is not recommended for new designs. Evaluate alternatives based on matching electrical parameters such as Zener voltage, power rating, and package dimensions. Consider surface mount equivalents if board space allows, or verify leaded replacements from other manufacturers that maintain the same JEDEC registration standards.

Part Context

The 1N4623-TP belongs to the standard 1N462x series of 500mW silicon Zener diodes produced by Micro Commercial Components. This series covers a wide voltage range from 1.8V to 47V. The 'TP' suffix indicates the device is supplied in tape and reel packaging. These diodes are characterized by low noise and stable performance, making them suitable for general-purpose regulation tasks in commercial electronics.

Replacement Considerations

Direct substitutes include the 1N4623-1E3 from Microchip Technology and the 1N749A from Central Semiconductor Corp. Both alternatives offer identical 4.3V Zener voltage and 500mW power ratings in compatible packages.