DDTA143XCA-7

Overview

The DDTA143XCA-7 is a single PNP pre-biased transistor manufactured by Diodes Incorporated, housed in an SOT23 surface-mount package. It integrates internal biasing resistors with values of R1 = 4.7 kΩ and R2 = 10 kΩ. The device supports a maximum 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 30 at Ic = -10 mA and a transition frequency (fT) of 250 MHz. Thermal performance specifies a power dissipation of 200 mW and a junction-to-ambient thermal resistance of 625 °C/W. Operating temperature ranges from -55°C to +150°C.

Feature Summary

• Epitaxial planar die construction for reliable switching performance
• Integrated base and emitter biasing resistors simplify circuit design
• Surface-mount SOT23 package optimized for automated assembly processes

Applications

• General-purpose switching applications requiring integrated biasing
• Driver circuits for low-power loads
• Logic interface buffering between microcontrollers and peripheral devices

Procurement Notes

Verify the specific ordering suffix against official documentation before procurement. The provided datasheet lists DDTA143XCA-7-F as the standard orderable part number with a 3,000-unit reel quantity. Confirm that the component meets RoHS and halogen-free requirements if mandated by project specifications. Ensure compatibility with the intended manufacturing process regarding moisture sensitivity levels.

Selection Notes

Select this component when a compact PNP solution with fixed internal biasing is required. The 4.7 kΩ input resistor value determines the drive current needed from the control logic. Verify that the -100 mA output current capability aligns with the load requirements. Consider the 200 mW power dissipation limit and ensure adequate thermal management on the PCB layout to maintain operation within the specified temperature range.

Part Context

This component belongs to the DDTA(R1≠R2) Series CA family of 50V PNP pre-biased transistors. It is the complementary counterpart to the DDTC NPN series. The 'CA' designation indicates the specific pinout and electrical characteristics defined for the SOT23 package variant. Other members of this series feature different resistor ratios to accommodate various logic drive voltages and current requirements.

Replacement Considerations

Direct replacements must match the PNP polarity, SOT23 package, and similar electrical ratings. Equivalent parts from other manufacturers should be verified for compatible R1/R2 values and hFE characteristics. Ensure any substitute maintains the same thermal resistance and operating temperature range.