DDTA115ECA-7

Overview

The DDTA115ECA-7-F is a PNP pre-biased small signal surface mount transistor from the DDTA (R1 = R2 series) CA family, manufactured by Diodes Incorporated. It features an epitaxial planar die construction in a SOT-23 package. The device integrates two equal biasing resistors with a nominal value of 100 kΩ each. Key electrical specifications include a maximum supply voltage (VCC) of -50 V, a continuous collector current (IC) of -100 mA, and a power dissipation (PD) of 200 mW at +25°C ambient temperature. The junction-to-ambient thermal resistance is 625 °C/W. The transition frequency (fT) is typically 250 MHz. Operating and storage temperatures range from -55°C to +150°C.

Feature Summary

• Integrates dual internal biasing resistors where R1 equals R2 for simplified circuit design.
• Qualified to AEC-Q101 standards for high reliability applications.
• Utilizes epitaxial planar die construction within a molded plastic SOT-23 case.
• Compliant with RoHS 3 directives and defined as halogen and antimony free.

Applications

• Automotive electronic circuits requiring AEC-Q101 qualified components.
• General-purpose switching applications utilizing integrated base biasing.
• Surface mount assembly processes compatible with standard SOT-23 footprints.

Procurement Notes

Verify the complete part number includes the suffix -7-F to confirm active status and specific packaging configuration. Confirm compliance requirements such as PPAP capability if intended for automotive production lines. Check the manufacturer's official documentation for the most recent environmental declarations and lead-free definitions prior to procurement.

Selection Notes

Select this component when a PNP digital transistor with matched internal resistors is required. Ensure the 100 kΩ resistor value aligns with the target input drive conditions. Verify that the -50 V supply voltage rating meets the system's maximum operating limits. Consider the 200 mW power dissipation limit relative to the expected thermal environment on the PCB.

Part Context

This component belongs to the DDTA115 series within the broader DDTA CA product line. It serves as the PNP counterpart to the DDTC115ECA NPN type. The 'CA' designation indicates the specific resistor matching and package style. Other variants in this series differ primarily in the nominal resistance values of the integrated biasing network.

Replacement Considerations

Direct functional equivalents within the same series include other DDTA1xxECA variants with different resistance values. For NPN polarity requirements, the DDTC115ECA provides a complementary option. Automotive-specific versions may carry the Q suffix, though standard and automotive parts are electrically identical unless specified otherwise.

FAQ

What is the relationship between the internal resistors R1 and R2?

In the DDTA115ECA variant, the internal resistors R1 and R2 are designed to be equal, with a nominal value of 100 kΩ each.

Is this component suitable for automotive applications?

Yes, the DDTA115ECA-7-F is qualified to AEC-Q101 standards and is PPAP capable, making it suitable for automotive electronics.

What is the maximum collector current rating?

The absolute maximum continuous collector current (IC) is rated at -100 mA.