1N4691

Overview

The Microchip Technology 1N4691 is a low operating current Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 6.2 V with a standard tolerance of ±5%. The device operates at a test current of 50 µA and supports a maximum power dissipation of 500 mW at +50°C, with derating applied above this threshold. It utilizes a hermetically sealed glass DO-35 package with copper clad steel leads. The component functions within an operating temperature range of -65°C to +175°C.

Feature Summary

• Double plug construction for enhanced reliability
• Metallurgically bonded internal structure
• Hermetically sealed glass case design

Applications

• Voltage regulation circuits
• Low current reference applications
• Temperature compensation networks

Procurement Notes

Verify the specific manufacturer source, as the 1N4691 part number appears in datasheets from multiple semiconductor companies including Microsemi and Central Semiconductor. Confirm that the required electrical characteristics, such as the 50 µA test current and 500 mW power rating, align with the specific vendor's documentation before procurement. Ensure the package type matches the intended PCB layout requirements.

Selection Notes

Select this component when a stable voltage reference is needed with minimal quiescent current consumption. The wide operating temperature range makes it suitable for harsh environments. Consider the thermal resistance and derating curve if the application involves high ambient temperatures or limited airflow. Verify lead material compatibility if soldering constraints exist.

Part Context

This component belongs to the 1N4678 through 1N4717 series of low-level Zener diodes. These devices are characterized by their double plug construction and metallurgical bonding, which contribute to their stability and longevity. The series covers a range of Zener voltages from 1.8 V to 43 V, all sharing similar package and thermal characteristics.

Replacement Considerations

Cross-reference with other manufacturers' 1N4691 equivalents to ensure pinout and electrical parameter compatibility. Verify that substitute parts meet the same hermetic sealing standards and thermal performance specifications.