DDTD142TC-7-F

Overview

The DDTD142TC-7-F is an NPN pre-biased surface-mount transistor manufactured by Diodes Incorporated. It features epitaxial planar die construction and integrates built-in biasing resistors within a compact SOT-23 package. The device supports a maximum collector current of 500 mA and a supply voltage of 50 V. Electrical characteristics include a DC current transfer ratio (hFE) ranging from 100 to 600 at IC = 5mA, and a gain-bandwidth product (fT) of 200 MHz. Thermal performance specifies a power dissipation of 250 mW with a junction-to-ambient thermal resistance of 500 °C/W. Operating temperatures range from -55°C to +150°C.

Feature Summary

• Epitaxial planar die construction for reliable semiconductor performance
• Integrated biasing resistors simplify circuit design and reduce component count
• Totally lead-free and fully RoHS compliant manufacturing process
• Halogen and antimony free "Green" device classification

Applications

• General-purpose switching applications in consumer electronics
• Driver circuits for low-power loads requiring integrated biasing
• Automotive electronic modules requiring specific change control protocols

Procurement Notes

Verify the exact ordering suffix against the manufacturer's official documentation before procurement. Confirm that the requested part number matches the active status and packaging specifications listed in the latest datasheet revision. Ensure compliance with environmental directives such as RoHS 3 and REACH requirements applicable to your region. Cross-reference the date code key to validate production timelines if necessary.

Selection Notes

Select this component when a single NPN transistor with integrated base biasing is required for space-constrained designs. Verify that the 500 mA continuous collector current meets the load requirements. Check the input voltage limits to ensure compatibility with the driving logic levels. Consider the thermal resistance values for adequate heat dissipation on the FR4 PCB layout.

Part Context

This part belongs to the DDTD series of NPN pre-biased transistors from Diodes Incorporated. It is designed as a complementary counterpart to PNP types within the same family. The series utilizes a standardized SOT-23 surface-mount package to facilitate automated assembly processes. It serves as a direct replacement for discrete resistor-transistor networks in various digital logic interfaces.

Replacement Considerations

Check for availability of alternative part numbers within the DDTD series, such as DDTD122TC-7-F, which may offer different resistor ratios. Verify pinout compatibility and electrical parameter overlaps before substituting. Consult the manufacturer's obsolescence notices for any discontinued variants in the lineup.