PDTC124TS,126

Overview

The PDTC124TS,126 is a small signal NPN digital transistor manufactured by Nexperia. It integrates a single NPN bipolar junction transistor with built-in bias resistors in a compact SOT-323 (SC-70) surface-mount package. The device features a collector-emitter voltage rating of 50 V and a maximum continuous collector current of 100 mA. It includes an internal base resistor of 10 kΩ and an emitter resistor of 47 kΩ, providing a fixed DC current gain (hFE) of at least 100. The component is RoHS compliant, lead-free, and operates within a standard temperature range suitable for general-purpose switching applications.

Feature Summary

• Integrates NPN transistor with built-in base and emitter bias resistors to reduce external component count
• Designed for high-speed switching operations with low input capacitance characteristics
• Utilizes a compact three-terminal surface-mount package optimized for automated assembly

Applications

• General-purpose logic level shifting and interface circuits
• Switching applications in portable battery-powered devices
• Driver stages for LEDs and small loads in consumer electronics

Procurement Notes

Verify the specific ordering code suffix to confirm the tape-and-reel packaging configuration, as the '126' suffix typically denotes reel packaging rather than cut tape. Ensure the procurement documentation explicitly references the Nexperia manufacturer origin, as this component is part of their extensive portfolio despite the initial brand query. Confirm RoHS compliance status through the official datasheet before finalizing supply chain agreements.

Selection Notes

Select this component when a compact NPN switch with integrated biasing is required to simplify PCB layout. The 50V rating makes it suitable for low-voltage logic interfaces, while the 100mA current capability supports moderate load driving. Consider the SOT-323 footprint constraints during mechanical design to ensure adequate thermal dissipation and solder joint reliability under operational conditions.

Part Context

This component belongs to the PDTC1xx series of NPN digital transistors from Nexperia. These devices are engineered to replace discrete resistor-transistor networks, offering space savings and improved consistency in mass production. The series is widely utilized in consumer electronics and industrial control systems where reliable switching performance and minimal bill-of-materials complexity are critical design priorities.

Replacement Considerations

Compatible substitutes include the BC847DQ and the DTC124EU, provided they match the SOT-323 package and electrical ratings. Verify that alternative components maintain the same internal resistor values (10kΩ/47kΩ) to ensure circuit compatibility without redesign.