1N2994A

Overview

The 1N2994A is a silicon unidirectional Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 45 V and a maximum power dissipation of 10 W. The device is housed in the DO-213AA (DO-4) axial leaded package, designed for chassis or stud mounting applications. This component serves as a voltage regulator to maintain stable DC output levels within electronic circuits.

Feature Summary

• Provides precise voltage regulation with a fixed 45 V reference point
• Capable of handling high power dissipation up to 10 W
• Constructed using robust silicon technology for reliable operation

Applications

• DC voltage regulation in power supply circuits
• Voltage clamping and protection stages
• Reference voltage generation in analog systems

Procurement Notes

Verify the manufacturer designation matches Microchip Technology specifications. Confirm the package type is DO-213AA/DO-4 and the voltage rating is exactly 45 V. Ensure the power rating aligns with 10 W requirements before integration into designs.

Selection Notes

Select this component when a 45 V Zener reference is required with significant power handling capabilities. The DO-4 package allows for direct mounting to heat sinks via chassis or stud methods, making it suitable for high-power industrial environments where thermal management is critical.

Part Context

This part belongs to the standard 1N299x series of high-power Zener diodes. These components are widely used in legacy and modern industrial electronics requiring stable voltage references under high load conditions. The DO-4 package remains a common form factor for through-hole high-power semiconductor devices.

Replacement Considerations

Cross-reference with other manufacturers offering 1N2994A equivalents in the DO-4 package. Verify that substitute parts meet the same 45 V Zener voltage and 10 W power dissipation ratings to ensure circuit compatibility.