DDTA143FE-7-F

Overview

The DDTA143FE-7-F is a PNP pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features an epitaxial planar die construction housed in a SOT523 package. The device integrates internal biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 22 kΩ. Key electrical specifications include a maximum supply voltage (VCC) of -50 V, a continuous collector current of -100 mA, and a power dissipation rating of 150 mW. The DC current gain (hFE) has a minimum value of 68 at IC = -10 mA. The component operates within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates two distinct biasing resistors (R1 ≠ R2) to simplify circuit design and reduce board space.
• Constructed using epitaxial planar die technology for reliable performance.
• Qualified to AEC-Q101 standards for high reliability applications.
• Compliant with RoHS directives and halogen/antimony-free green device requirements.

Applications

• Switching circuits requiring integrated base biasing.
• Driver stages for loads such as relays or LEDs.
• Logic interface circuits for level shifting or buffering.
• Automotive electronics systems meeting AEC-Q101 requirements.

Procurement Notes

Verify the specific ordering suffix '-7-F' corresponds to the AEC-Q101 qualified version with the P10 marking code. Confirm the reel size is 7 inches and tape width is 8 mm for standard surface mount processing. Ensure compliance with RoHS 3 and REACH regulations if required by your manufacturing environment. Check for moisture sensitivity level 1 status for storage and handling procedures.

Selection Notes

Select this component when a PNP configuration with unequal biasing resistors (4.7kΩ input, 22kΩ emitter) is required. The SOT523 package is suitable for high-density PCB layouts. Consider the -50V collector-emitter voltage and -100mA current limits for load compatibility. Verify thermal resistance constraints for ambient temperature operations up to 150°C.

Part Context

This part belongs to the DDTA(R1≠R2) Series E family from Diodes Incorporated. It is the PNP counterpart to the DDTC series NPN devices. The 'E' suffix indicates the epitaxial planar construction. Other variants in this series differ by resistor ratios and marking codes but share similar electrical characteristics and packaging.

Replacement Considerations

Direct functional substitutes within the same manufacturer's lineup include DDTA143XE-7-F (4.7kΩ/10kΩ) and DDTA143ZE-7-F (4.7kΩ/47kΩ). Cross-manufacturer equivalents should match the SOT523 package, PNP polarity, -50V VCEO, and -100mA IC ratings. Verify resistor tolerance and hFE min values before substitution.