CMLT3904EG TR PBFREE

Overview

The CMLT3904EG TR PBFREE is a dual NPN small-signal transistor housed in an SOT-563 package. It features a collector-base voltage of 60 V, a collector-emitter voltage of 40 V, and an emitter-base voltage of 6.0 V. The continuous collector current rating is 200 mA. Power dissipation varies by board type: 350 mW on ceramic/aluminum cores, 300 mW on FR-4 epoxy with 4.0 mm² pads, and 150 mW on FR-4 epoxy with 1.4 mm² pads. The transition frequency is 300 MHz, and the operating temperature range spans from -65 °C to +150 °C.

Feature Summary

• Dual NPN configuration within a compact SOT-563 surface-mount package
• Enhanced specifications including improved breakdown voltages and lower saturation voltage
• Halogen-free design compliant with environmental standards

Applications

• Small signal general purpose amplifier circuits
• High-speed switching applications
• Voltage clamping protection circuits
• DC/DC converters

Procurement Notes

Verify the exact ordering suffix against the manufacturer's official documentation before purchase. Confirm that the 'PBFREE' designation matches the required lead finish specification for your assembly process. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability.

Selection Notes

Select this component when space constraints require a dual NPN transistor in an SOT-563 footprint. Consider the enhanced electrical characteristics, such as the minimum 60 V BVCBO and reduced VCE(SAT), compared to standard equivalents. Evaluate thermal management requirements based on the specific PCB copper pad area available for heat dissipation.

Part Context

This device belongs to Central Semiconductor's complementary transistor series, which includes matching PNP (CMLT3906EG) and NPN/PNP pairs (CMLT3946EG). All variants share the same SOT-563 mechanical outline but differ in internal transistor polarity and specific electrical parameters tailored for different circuit configurations.

Replacement Considerations

Direct substitutes include other dual NPN transistors in the SOT-563 package with similar voltage and current ratings. Verify pinout compatibility, specifically the collector and base connections, as pin assignments may vary between manufacturers. Ensure replacement parts meet the required 300 MHz transition frequency and power dissipation limits.