1N2828B

Overview

The Microchip Technology 1N2828B is a high-power Zener diode designed for demanding voltage regulation applications. It features a nominal Zener voltage of 45 V with a tolerance of ±5%. The component supports a maximum power dissipation of 50 W and operates within a temperature range of -65 °C to +200 °C. Packaged in the TO-204AD (TO-3) through-hole format, it exhibits a maximum reverse leakage current of 10 µA and a typical Zener impedance of 4.5 Ω at a test current of 280 mA.

Feature Summary

• High power handling capability rated at 50 W for robust voltage regulation
• Wide operating temperature range extending up to +200 °C
• Through-hole mounting configuration for secure mechanical attachment

Applications

• High-power voltage regulation circuits
• Industrial equipment requiring stable reference voltages
• Power supply protection stages

Procurement Notes

Verify the specific manufacturer source, as multiple entities list this part number. Confirm the package type matches the required TO-204AD footprint. Ensure the voltage rating aligns with system requirements. Check for RoHS compliance status if restricted substances are prohibited. Validate the supplier's authorization status before purchase.

Selection Notes

Select this component when high power dissipation is critical. The 45 V rating suits specific regulation needs. Consider the large TO-3 package size for thermal management. Verify lead compatibility with existing PCB layouts. Compare impedance characteristics against circuit sensitivity requirements.

Part Context

This device belongs to the JEDEC registered 1N28xxB series of high-power Zener diodes. These components are engineered for industrial environments where reliability under high stress is essential. The series offers standardized voltage ratings and power capabilities for consistent performance across various electronic designs.

Replacement Considerations

Cross-reference with other manufacturers offering equivalent 50 W, 45 V Zener diodes in TO-204AD packages. Verify electrical parameters such as impedance and leakage current match original specifications. Ensure thermal resistance characteristics are compatible with existing heat sinking solutions.