DDTA143XE-7

Overview

The DDTA143XE-7-F is a PNP pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features an epitaxial planar die construction and integrates internal biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 10 kΩ. The device operates within a supply voltage range up to -50 V and supports a continuous collector current of -100 mA. Power dissipation is rated at 150 mW, with a thermal resistance (junction to ambient) of 833 °C/W. The unit is housed in a SOT523 package, weighs approximately 0.002 grams, and functions across an operating temperature range of -55°C to +150°C.

Feature Summary

• Integrates two distinct biasing resistors (R1 ≠ R2) to simplify circuit design and reduce component count.
• Constructed using epitaxial planar die technology for reliable performance.
• Compliant with AEC-Q101 standards for high reliability applications.
• Manufactured as a lead-free, halogen-free, and antimony-free 'Green' device.

Applications

• General-purpose switching circuits requiring integrated biasing.
• Driver stages for low-power loads in consumer electronics.
• Logic interface circuits converting microcontroller signals to higher current levels.
• Automotive electronic modules meeting AEC-Q101 qualification requirements.

Procurement Notes

Verify the specific ordering suffix '-7-F' against official Diodes Incorporated documentation to confirm packaging details, including reel size and tape width specifications. Ensure that the required marking code 'P09' aligns with your assembly tracking systems. Confirm RoHS compliance status directly with the manufacturer's latest quality declarations prior to procurement.

Selection Notes

Select this component when a PNP configuration with unequal biasing resistors (4.7kΩ input, 10kΩ base-emitter) is required. Verify that the -100 mA output current capability meets the load requirements. Consider the SOT523 package dimensions for PCB layout constraints. Ensure the operating environment stays within the specified -55°C to +150°C temperature range.

Part Context

This part belongs to the DDTA(R1≠R2 Series)E family of pre-biased transistors from Diodes Incorporated. It serves as the PNP counterpart to the DDTC series NPN devices. The 'XE' designation specifically identifies the 4.7kΩ/10kΩ resistor ratio variant within this product line.

Replacement Considerations

Direct substitutes include other DDTA143XE variants from different manufacturers if pinout and electrical characteristics match exactly. Complementary NPN equivalents are available in the DDTC143XE series. Verify thermal resistance and package compatibility before substitution.

FAQ

What are the nominal values of the built-in biasing resistors?

The DDTA143XE features an input resistor (R1) of 4.7 kΩ and a second resistor (R2) of 10 kΩ.

Is this component qualified for automotive applications?

Yes, the DDTA143XE is qualified to AEC-Q101 standards for high reliability.

What is the maximum power dissipation rating?

The maximum power dissipation is 150 mW when mounted on an FR4 PC board with minimum recommended pad layout.