MMDT3946HE3-TP

Overview

The MMDT3946HE3-TP is a complementary NPN/PNP small signal surface mount transistor manufactured by Micro Commercial Components. It features an epitaxial planar die construction within a SOT-363 package. The device is AEC-Q101 qualified and RoHS compliant. Maximum ratings include a collector-emitter voltage of 40V, continuous collector current of 200mA, and power dissipation of 200mW. Thermal resistance junction-to-ambient is 625°C/W. Operating junction temperature ranges from -55°C to +150°C. DC current gain (hFE) varies from 40 to 300 depending on collector current conditions.

Feature Summary

• AEC-Q101 qualified for automotive reliability standards
• Complementary pair configuration combining NPN and PNP elements
• Halogen-free 'Green' device with UL 94 V-0 flammability rating epoxy
• Moisture Sensitivity Level 1 certification

Applications

• Low power amplification circuits
• General purpose switching applications
• Digital logic interface circuits

Procurement Notes

Verify the ordering suffix '-TP' indicates tape and reel packaging containing 3000 pieces per reel. Confirm the 'E3' suffix denotes lead-free finish and RoHS compliance as specified in the manufacturer's documentation. Ensure sourcing from authorized distributors to maintain traceability and quality standards defined by Micro Commercial Components Corp.

Selection Notes

Select this component for space-constrained designs requiring a dual transistor solution in a compact SOT-363 footprint. Consider the 200mA continuous current limit and 200mW power dissipation when designing thermal management strategies. Verify that the 40V breakdown voltage meets the circuit requirements for both NPN and PNP sections under maximum operating conditions.

Part Context

This part belongs to the MMDT3946 series of complementary small signal transistors. It serves as a surface-mount alternative to through-hole discrete pairs, integrating one 3904-type NPN and one 3906-type PNP transistor into a single package. The HE3 designation typically refers to Micro Commercial Components' specific environmental and lead-free product line.

Replacement Considerations

Direct functional equivalents include the standard MMDT3946 from Diodes Incorporated or other manufacturers offering the same electrical characteristics in a SOT-363 package. Verify pinout compatibility and thermal resistance values before substitution.