DDTA143EUA-7-F

Overview

The DDTA143EUA-7-F is a PNP pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features an epitaxial planar die construction in a SOT-323 case. The device integrates built-in biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 10 kΩ. Key electrical ratings include a supply voltage (VCC) of -50 V, output current (IO) of -100 mA, and power dissipation (Pd) of 200 mW. The DC current gain (Gl) has a minimum value of -68 at VO = -5 V and IO = -10 mA. The transition frequency (fT) is typically 250 MHz. Operating and storage temperature ranges extend from -55 °C to +150 °C.

Feature Summary

• Integrates two distinct biasing resistors (R1 ≠ R2) within a single compact package to simplify circuit design.
• Utilizes epitaxial planar die construction for reliable performance in surface mount applications.
• Provides complementary NPN types available within the DDTC series.

Applications

• General-purpose switching circuits requiring integrated base biasing.
• Driver stages for low-power loads where resistor count reduction is beneficial.
• Digital logic interface applications utilizing pre-biased configurations.

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status and manufacturing date codes against specific project requirements. Ensure proper handling procedures are followed due to surface mount packaging specifications. Review datasheet revision history for any updates to electrical characteristics or mechanical dimensions prior to final procurement decisions.

Selection Notes

Select this component when a PNP configuration with unequal biasing resistors is required. The 4.7 kΩ input resistor and 10 kΩ emitter-base resistor define the specific drive characteristics. Consider the -50 V collector-emitter breakdown voltage and 200 mW power dissipation limits for thermal management. Verify that the SOT-323 footprint matches the PCB layout constraints.

Part Context

This part belongs to the DDTA (R1≠R2 Series) UA family from Diodes Incorporated. It is specifically designated as DDTA143EUA-7-F, indicating the SOT-323 package and tape & reel shipping format. The 'EUA' suffix corresponds to the specific resistor combination of 4.7 kΩ and 10 kΩ within the broader DDTA143 product line.

Replacement Considerations

Direct substitutes within the same manufacturer's lineup include other DDTA143 variants such as DDTA143XUA-7-F or DDTA143FUA-7-F, provided their specific resistor ratios match the circuit requirements. Cross-manufacturer replacements must be evaluated based on pinout compatibility, voltage ratings, and thermal resistance parameters.