DDTC143EUA-7-F

Overview

The DDTC143EUA-7-F is an NPN pre-biased small signal surface mount transistor from Diodes Incorporated, housed in a SOT-323 package. It features built-in biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 4.7 kΩ. The device supports a supply voltage (VCC) of 50 V and a continuous collector current (IO) of 100 mA. Electrical characteristics include a minimum DC current gain (Gl) of 20 at IO = 10 mA and VO = 5 V, and a typical gain-bandwidth product (fT) of 250 MHz. Power dissipation is rated at 200 mW, with an operating temperature range spanning -55°C to +150°C.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated biasing resistors simplify circuit design
• Qualified to AEC-Q101 standards for high reliability
• Totally lead-free and fully RoHS compliant

Applications

• Switching applications requiring integrated base drive
• Automotive electronics systems
• General-purpose digital logic interfacing

Procurement Notes

Verify the component against the official Diodes Incorporated datasheet DS30321 Rev. 13-2 to confirm electrical parameters and physical dimensions. Ensure compliance with specific environmental requirements such as halogen-free status if mandated by the application. Cross-reference the marking code 'N08' on the SOT-323 package to authenticate the manufacturer and part identity before integration into production.

Selection Notes

Select this component when an NPN configuration with equal internal biasing resistors is required. The 4.7 kΩ resistor values are suitable for standard logic level driving. Consider the complementary PNP type (DDTA143EUA) if a matching pair is needed. Verify that the 100 mA output current and 50 V breakdown voltage meet the load requirements of the target circuit design.

Part Context

This part belongs to the DDTC (R1 = R2 SERIES) UA family of pre-biased transistors. It shares the same SOT-323 mechanical outline and epitaxial construction as other members like the DDTC123EUA and DDTC114EUA. The primary distinction lies in the specific resistance values of the integrated bias network, which determines the input current characteristics for different switching speeds and drive levels.

Replacement Considerations

Direct substitutes within the same series include DDTC123EUA-7-F and DDTC114EUA-7-F, provided their respective resistor values match the circuit requirements. Complementary PNP equivalents are available in the DDTA143EUA series.