1N2828A

Overview

The 1N2828A is a 50 W silicon Zener diode designed for voltage regulation in through-hole applications. It features a nominal Zener voltage of 45 V with a tolerance of ±10%. The device operates within a maximum reverse current of 280 µA and exhibits a maximum Zener impedance of 4.5 Ω at the test current. Packaged in the TO-204AD (TO-3) case, it supports high-power dissipation capabilities suitable for robust industrial environments.

Feature Summary

• High power handling capability of 50 watts for stable voltage regulation under significant load conditions
• Robust TO-204AD through-hole package construction ensuring reliable thermal management and mechanical stability
• Silicon junction technology providing consistent unidirectional voltage clamping characteristics

Applications

• High-power voltage reference circuits requiring stable 45 V regulation
• Industrial power supply protection stages utilizing through-hole mounting
• Overvoltage protection networks in heavy-duty electronic equipment

Procurement Notes

Verify the manufacturer marking against Microchip Technology specifications to ensure authenticity. Confirm the package type matches the required TO-204AD footprint on the target PCB. Check datasheet revisions for any updates to electrical limits or thermal resistance values before finalizing the design integration.

Selection Notes

Select this component when a 45 V Zener voltage with 50 W power rating is required. Ensure the circuit design accommodates the TO-204AD package dimensions and thermal requirements. Compare the ±10% tolerance against system voltage accuracy needs. Verify that the 4.5 Ω impedance meets the dynamic regulation performance criteria for the specific application load.

Part Context

This part belongs to the standard Zener diode family manufactured by Microchip Technology. It utilizes established silicon planar technology for reliable operation. The TO-204AD package is a legacy form factor commonly used in high-power discrete semiconductor applications where robust mechanical mounting is essential.

Replacement Considerations

Cross-reference with other manufacturers offering equivalent 45 V, 50 W Zener diodes in TO-204AD packages. Verify pinout compatibility and thermal resistance parameters before substitution. Ensure replacement parts meet the same ±10% voltage tolerance and impedance specifications.