PDTD123YUX

Overview

The Nexperia PDTD123YUX is an NPN Resistor-Equipped Transistor (RET) housed in a SOT323 (SC-70) surface-mount package. It features built-in bias resistors with R1 at 2.2 kΩ and R2 at 10 kΩ, providing a resistor ratio of 4.55. The device supports a collector-emitter voltage (VCEO) of 50 V and a continuous output current (IO) of 500 mA. Key electrical characteristics include a DC current gain (hFE) of 70 at 50 mA, a transition frequency (fT) of 225 MHz, and a maximum junction temperature of 175 °C. It is AEC-Q101 qualified for automotive environments.

Feature Summary

• Built-in bias resistors simplify circuit design and reduce component count
• High temperature capability up to 175 °C for demanding applications
• AEC-Q101 qualified for automotive reliability standards
• ±10% resistor ratio tolerance ensures consistent performance

Applications

• Digital applications in automotive and industrial segments
• Controlling IC inputs
• 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 latest documentation to confirm packaging configuration and manufacturing site codes. Ensure compatibility with standard SOT323 footprints during PCB layout. Confirm that the selected variant meets the required AEC-Q101 qualification levels if deployed in automotive systems. Cross-reference marking codes to validate authenticity upon receipt.

Selection Notes

Select this component when a compact NPN solution with integrated biasing is required for space-constrained designs. The 2.2 kΩ input resistor suits moderate drive currents, while the 10 kΩ base-emitter resistor aids in leakage suppression. Consider the 175 °C junction rating for high-thermal environments. Verify that the 500 mA output current meets load requirements without exceeding power dissipation limits on the target PCB.

Part Context

The PDTD123YUX belongs to the PDTD1xxxU series of NPN resistor-equipped transistors from Nexperia. This family shares the SOT323 package but varies in internal resistor values to suit different logic interface needs. The 'Y' designation specifically indicates the 2.2 kΩ input and 10 kΩ base-emitter resistor combination within this standardized product line.

Replacement Considerations

The PDTB123YU serves as the direct PNP complement within the same series. For pin-compatible replacements, verify equivalent resistor ratios and current ratings in other RET families.