1N2838B

Overview

The Microchip Technology 1N2838B is a high-power Zener diode designed for robust voltage regulation applications. It utilizes the TO-204AD (TO-3) through-hole package to facilitate efficient thermal dissipation. The device provides a nominal Zener voltage of 100 V with a tolerance of ±5%. It supports a maximum power dissipation of 50 W, ensuring stability under significant load conditions. Key electrical characteristics include a reverse leakage current of 10 µA at 76 V and a forward voltage drop of 1.5 V at 10 A. The unit exhibits a maximum impedance of 20 Ohms and operates within a junction temperature range of -65°C to 175°C.

Feature Summary

• High power handling capability with 50 W maximum dissipation rating
• Robust TO-204AD (TO-3) through-hole package construction
• Wide operating temperature range extending up to 175°C

Applications

• High-power voltage regulation circuits
• Industrial power supply protection
• Overvoltage clamping in heavy-duty equipment

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm RoHS compliance status as this specific part may not meet current environmental directives. Ensure the TO-204AD package dimensions match your PCB or chassis mounting requirements before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring stable 100 V reference points under high current loads. The TO-3 package necessitates adequate heatsinking infrastructure due to the 50 W power rating. Evaluate thermal management strategies carefully to maintain junction temperatures within the specified -65°C to 175°C operational window during continuous operation.

Part Context

This device belongs to Microchip's legacy discrete semiconductor portfolio, specifically within the Zener diode category. It serves as a rugged solution for industrial environments where standard surface-mount components lack sufficient power handling capacity. The TO-204AD package represents a traditional axial leaded form factor widely used in established hardware designs.

Replacement Considerations

Consult official Microchip documentation for verified cross-reference part numbers. Ensure any substitute maintains identical 100 V Zener voltage, 50 W power rating, and TO-204AD physical footprint to guarantee mechanical and electrical compatibility without redesigning the host circuit board.