1N4742A G

Overview

The Microsemi Corporation 1N4742A G is a silicon Zener diode designed for voltage regulation applications. It features a hermetically sealed glass body construction within the DO-41 axial lead package. The device provides a nominal Zener voltage of 12V with a standard tolerance of 5%. Rated for a maximum power dissipation of 1W, it utilizes a void-free transfer molded thermosetting epoxy body meeting UL94V-O standards. The component is unidirectional and isolated.

Feature Summary

• Hermetically sealed glass body construction for high reliability
• Axial-lead mounting terminals for flexible installation
• Voltage stabilization over broad operating current and temperature ranges

Applications

• Voltage stabilization circuits
• Voltage regulation in high density designs
• High reliability applications requiring source control drawings

Procurement Notes

Verify the specific manufacturer designation as the part number appears associated with multiple entities including Microsemi and ETC2. Confirm RoHS compliance status, as some variants are marked non-compliant while others may differ. Ensure the package type matches the required DO-41 specification and check for discontinuation status before procurement.

Selection Notes

Select this component when a 12V Zener reference is needed in an axial package. The glass hermetic seal makes it suitable for environments where moisture resistance or strict reliability standards are required. Compare thermal resistance against plastic equivalents if heat dissipation is a primary constraint.

Part Context

This part belongs to the 1N47xx series of 1-watt Zener diodes. It serves as the surface mount equivalent to the 1N4728A through 1N4764A registration but utilizes the DO-41 outline instead of JEDEC surface mount outlines. The 'G' suffix typically denotes the glass encapsulation variant offering hermetic sealing qualities compared to plastic versions.