2N6271

Overview

The Microchip Technology 2N6271 is a silicon NPN power transistor designed for high-voltage and high-current applications. It features a maximum collector-emitter voltage of 100V and a continuous collector current rating of 30A. The device is housed in a hermetic steel TO-3 (TO-204AA) package, providing robust mechanical strength and high sealing class suitable for demanding environments. Key electrical characteristics include a DC current gain (hFE) range typically between 20 and 100 at specified operating conditions. The component supports through-hole mounting and is rated for operation within standard junction temperature limits, ensuring reliable performance in power switching and amplification circuits.

Feature Summary

• Hermetic steel TO-3 package construction ensures high mechanical strength and environmental sealing
• Silicon NPN bipolar junction transistor technology optimized for power applications
• Capable of handling high collector current up to 30A with 100V breakdown voltage

Applications

• High-power switching circuits requiring robust isolation
• Industrial motor control systems
• Power amplification stages in audio or RF equipment

Procurement Notes

Verify the manufacturer marking on the TO-3 package header to confirm Microchip Technology origin, as multiple vendors historically produced this military-grade part number. Ensure the specific lot code matches your quality assurance requirements. Check for any ordering suffixes that may indicate radiation hardening or specific binning if required by your design specifications. Confirm lead times with authorized distributors due to potential supply chain variations for legacy components.

Selection Notes

Select the 2N6271 when a hermetically sealed NPN power transistor is required for high-reliability applications. Consider its 30A current capacity and 100V voltage rating against thermal management constraints inherent to the TO-3 package. Evaluate the need for radiation hardness if operating in aerospace or nuclear environments, as some variants offer this qualification. Compare thermal resistance values against your heat sink capabilities to ensure safe junction temperatures under peak load conditions.

Part Context

The 2N6271 belongs to a family of silicon NPN power transistors originally standardized for military and aerospace use. It shares the TO-3 hermetic package form factor with other high-power devices like the 2N3055 but offers distinct electrical parameters tailored for specific voltage and current thresholds. Microchip Technology continues to support this legacy part number, maintaining compatibility with original equipment designs while adhering to modern manufacturing standards for reliability and consistency.

Replacement Considerations

Publicly confirmed substitute part numbers are not explicitly listed in the provided source material. Engineers should consult official Microchip Technology cross-reference documents or authorized distributor databases for verified equivalents. Generic replacements must match the TO-3 package, NPN configuration, and minimum 100V/30A ratings to ensure functional compatibility without redesign.