1N4372A

Single Zener Diodes Overview

The Fairchild Semiconductor 1N4372A is a silicon unidirectional Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 3V with a tolerance of 5%. The device is rated for a maximum power dissipation of 0.4W at ambient temperatures up to 75°C, with thermal derating required above this threshold. It utilizes a DO-7 glass axial leaded package, providing isolation between the component body and circuit ground. The unit contains a single diode element with two terminals, constructed from silicon material suitable for standard operating conditions.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation through controlled Zener breakdown characteristics in the reverse bias region.
• Utilizes a hermetically sealed glass axial package to ensure environmental protection and electrical isolation.
• Offers precise voltage referencing capabilities with defined tolerance levels for consistent performance.

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as the 1N4372A designation is widely used across multiple semiconductor producers including Microsemi and MACOM. Confirm that the supplied units match the Fairchild Semiconductor origin if brand specificity is required for your application. Check RoHS compliance status and packaging details against your assembly requirements. Ensure the part number suffix corresponds to the exact voltage tolerance and package variant needed for your design specifications.

Single Zener Diodes Selection Notes

Select this component when a 3V Zener reference is required in a DO-7 axial package. Consider the 0.4W power dissipation limit and ensure adequate thermal management or derating for operation above 75°C. Verify that the 5% voltage tolerance meets the precision requirements of the target circuit. Compare alternative manufacturers if supply chain diversity or specific compliance certifications are necessary for the project.

Single Zener Diodes Part Context

The 1N4372A belongs to the standard 1N437x series of Zener diodes, which covers a range of low-voltage references. This series is commonly utilized in general-purpose electronics for basic voltage clamping and regulation tasks. The DO-7 package is a traditional axial leaded form factor, often preferred for through-hole mounting in legacy or robust industrial designs. Similar parts in the series include the 1N4370A and 1N4371A, differing primarily in their nominal Zener voltages.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers' 1N4372A equivalents, such as those from Microsemi or MACOM, ensuring identical voltage, power rating, and package dimensions. Verify that any substitute maintains the same DO-7 glass axial configuration and electrical characteristics for direct pin-compatible replacement.