DDTC143ECA-7-F

Overview

The DDTC143ECA-7-F is an NPN pre-biased small signal surface mount transistor from Diodes Incorporated, housed in a SOT23 package. It features built-in biasing resistors where R1 equals R2, with a nominal resistance of 4.7 kΩ. The device supports a supply voltage (VCC) of 50 V and a continuous collector current (IC) of 100 mA. Electrical characteristics include a minimum DC current gain (hFE) of 20 at IO = 10 mA, an input voltage threshold (VI(on)) typified at 1.9 V, and an output saturation voltage (VO(on)) of 0.3 V maximum. 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
• Built-in biasing resistors simplify circuit design by reducing component count
• Qualified to AEC-Q101 standards for high reliability applications
• Totally lead-free and fully RoHS compliant

Applications

• Automotive electronics requiring AEC-Q101 qualified components
• General-purpose switching circuits utilizing pre-biased configurations
• Interface drivers where simplified biasing networks are required

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging quantity and compliance status. Confirm that the selected variant matches the required automotive or standard grade specifications. Cross-reference the date code and marking information to validate production authenticity and traceability before finalizing procurement orders.

Selection Notes

Select this component when a single NPN transistor with integrated equal-value biasing resistors is needed. Ensure the 4.7 kΩ resistor value aligns with the target drive current requirements. Verify that the 100 mA collector current rating meets the load demands. Check thermal constraints to ensure power dissipation remains within the 200 mW limit under expected ambient conditions.

Part Context

This part belongs to the DDTC143ECA series, which includes variants with different resistor values such as 2.2 kΩ, 10 kΩ, 22 kΩ, 47 kΩ, and 100 kΩ. All members share the same NPN pre-biased architecture and SOT23 packaging. The 'CA' designation indicates the R1=R2 configuration, distinguishing it from other series combinations.

Replacement Considerations

Direct electrical equivalents may exist within the same family, such as the DDTC143ECAQ-7-F for automotive-specific PPAP requirements. Verify pinout compatibility and thermal resistance parameters when substituting with similar pre-biased transistors from other manufacturers.