1N2825A

Overview

The Microchip Technology 1N2825A is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 36 V with a tolerance of ±10%. The device is rated for a maximum power dissipation of 50 W and operates with a test current of 350 mA. It exhibits a dynamic impedance of 3.5 Ohms at the specified test conditions. The component utilizes a TO-204AD (TO-3) through-hole package, suitable for high-power thermal management requirements in industrial and commercial electronic circuits.

Feature Summary

• High power dissipation capability of 50 W for robust voltage regulation
• Precision Zener voltage tolerance of ±10% at 36 V
• Low dynamic impedance of 3.5 Ohms for stable output
• Durable TO-204AD (TO-3) metal case construction

Applications

• High-power voltage reference circuits
• Overvoltage protection systems
• Industrial power supply regulation

Procurement Notes

Verify the specific manufacturer source, as Microsemi Corporation was acquired by Microchip Technology. Confirm RoHS compliance status, as historical data indicates non-compliance for this legacy part number. Ensure the package matches the required TO-204AD footprint and pin configuration for your design integration.

Selection Notes

Select this component when a 36 V regulated voltage is required with significant power handling capabilities. The TO-3 package necessitates appropriate heatsinking solutions due to the 50 W rating. Consider the ±10% voltage tolerance against circuit sensitivity requirements before finalizing the design choice.

Part Context

This part belongs to the standard 1N series Zener diode family, widely used in discrete semiconductor applications. Microchip Technology continues production of these legacy parts following its acquisition of Microsemi Corporation. The 1N2825A represents a high-power variant within the series, distinguished by its metal TO-3 packaging compared to smaller plastic packages.

Replacement Considerations

JAN1N2825B is a documented equivalent offering tighter 5% voltage tolerance. Verify pinout compatibility and thermal resistance differences when substituting. Ensure the replacement meets the same 50 W power dissipation rating for direct interchangeability.