DDTA143ZUA-7-F

Overview

The DDTA143ZUA-7-F is a PNP pre-biased small signal surface mount transistor from Diodes Incorporated, housed in an SOT-323 package. It integrates built-in biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 47 kΩ. The device supports a supply voltage (VCC) of -50 V and a continuous output current (IC) of -100 mA. Power dissipation is rated at 200 mW, with a junction-to-ambient thermal resistance of 625 °C/W. Operating and storage temperatures range from -55°C to +150°C.

Feature Summary

• Integrates two distinct biasing resistors within a single compact surface-mount package
• Utilizes epitaxial planar die construction for reliable performance
• Designed as a complementary type to the DDTC NPN series

Applications

• General-purpose switching applications
• Driver circuits for logic interfaces
• High-density PCB designs requiring integrated biasing

Procurement Notes

Verify component authenticity by checking the marking code 'P11' on the SOT-323 casing against official documentation. Confirm RoHS compliance status and manufacturing date codes to ensure adherence to environmental standards. Review datasheet revision history for any updates to electrical characteristics or mechanical dimensions prior to final procurement.

Selection Notes

Select this component when a PNP configuration with specific 4.7 kΩ input and 47 kΩ emitter resistor ratios is required. Ensure the design accommodates the -50 V maximum supply voltage and -100 mA current limits. Consider the SOT-323 footprint constraints and thermal dissipation requirements relative to the application's ambient temperature conditions.

Part Context

This part belongs to the DDTA(R1≠R2) Series UA family, which offers various combinations of internal resistors. The 'UA' suffix indicates the SOT-323 case style. Other members include DDTA143XUA and DDTA144VUA, differing primarily in resistor values. This specific model provides a standard ratio suitable for general digital switching tasks.

Replacement Considerations

Direct substitutes within the same manufacturer family include DDTA143XUA and DDTA143FUA, provided their respective resistor values match the circuit requirements. Cross-manufacturer replacements must be verified for pin compatibility, voltage ratings, and thermal characteristics.