CMLT3946EG TR PBFREE

Overview

The CMLT3946EG TR PBFREE is a surface-mount silicon complementary transistor array manufactured by Central Semiconductor Corp. It integrates one NPN and one PNP transistor within a space-saving SOT-563 package, designed for small signal general purpose amplifier and switching applications. The device features enhanced specifications including a collector-base voltage of 60V minimum and a collector-emitter voltage of 40V minimum. Continuous collector current is rated at 200mA with power dissipation capabilities ranging from 150mW to 350mW depending on the PCB mounting pad area. Operating junction temperature spans from -65°C to +150°C.

Feature Summary

• Complementary dual configuration integrating NPN and PNP transistors in a single compact SOT-563 package
• Enhanced electrical specifications providing improved breakdown voltages and lower saturation characteristics compared to standard variants
• Halogen-free design compliant with environmental regulations

Applications

• Small signal general purpose amplification circuits
• High-speed switching applications
• Digital logic interface stages

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm plating options and packaging type. Ensure the procurement request explicitly states the required lead finish, such as PBFREE or TIN/LEAD, if applicable. Confirm that the requested quantity aligns with the manufacturer's standard reel packaging requirements to avoid fulfillment delays.

Selection Notes

Select this component when a compact footprint is required for complementary NPN/PNP pairs in low-power designs. Consider the thermal resistance and power dissipation limits relative to the target PCB copper pad area. Verify that the 40V collector-emitter voltage rating meets the circuit's maximum operating conditions and that the 200mA current capability is sufficient for the load requirements.

Part Context

This part belongs to the CMLT39xxE series of enhanced specification complementary transistors from Central Semiconductor. It serves as the paired counterpart to single-transistor variants like the CMLT3904EG and CMLT3906EG. The 'EG' suffix denotes the enhanced specification variant, while 'TR PBFREE' indicates tape-and-reel packaging with lead-free plating.

Replacement Considerations

Direct replacements include the standard specification CMLT3946E TR PBFREE, noting differences in breakdown voltage and saturation parameters. Other compatible arrays in the same SOT-563 package should be evaluated for pin compatibility and electrical margin.