PDTD143XUX

Overview

The PDTD143XUX is an NPN Resistor-Equipped Transistor (RET) from the PDTD1xxxU series, housed in a SOT323 (SC-70) plastic surface-mounted package. It features built-in bias resistors with R1 at 4.7 kΩ and R2 at 10 kΩ. The device supports a collector-emitter voltage of 50 V and an output current of 500 mA. Key electrical characteristics include a DC current gain (hFE) of 70 at 50 mA and 5 V, a collector-emitter saturation voltage of 100 mV at 50 mA and 2.5 mA base current, and a transition frequency of 225 MHz. Total power dissipation reaches 300 mW in free air and 425 mW on a standard FR4 PCB.

Feature Summary

• Built-in bias resistors simplify circuit design and reduce component count
• AEC-Q101 qualified for automotive applications
• High temperature operation up to 175 °C junction temperature
• ±10% resistor ratio tolerance

Applications

• IC inputs control
• Switching loads
• Cost-saving alternative to BC807 or BC817 series transistors in digital applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact resistor values and package variant. Confirm RoHS compliance status and ensure the selected part number matches the required marking code for manufacturing traceability. Cross-reference the latest datasheet revision to validate any updates to thermal or electrical specifications before finalizing procurement.

Selection Notes

Select this component when a compact NPN transistor with integrated biasing is required for space-constrained designs. Ensure the application operates within the 50 V collector-emitter voltage limit and 500 mA output current capability. Verify that the 4.7 kΩ input resistor and 10 kΩ base-emitter resistor align with the intended drive logic levels and switching requirements.

Part Context

The PDTD143XUX belongs to the PDTD1xxxU series, which includes various NPN RET configurations with different resistor ratios. All members share the same SOT323 package and core transistor characteristics, differing primarily in the internal R1 and R2 values. This family provides standardized solutions for general-purpose switching and amplification tasks.

Replacement Considerations

PDTB143XU is the documented PNP complement within the same series.