DDTA143FUA-7-F

Overview

The DDTA143FUA-7-F is a PNP pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features an epitaxial planar die construction housed in a SOT-323 package. The device integrates internal biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 22 kΩ. Key electrical specifications include a maximum supply voltage (VCC) of -50 V, a continuous output current (IC) of -100 mA, and a power dissipation (Pd) of 200 mW at 25°C ambient temperature. The DC current gain (hFE) has a minimum value of -68. The component operates within a junction and storage temperature range of -55°C to +150°C.

Feature Summary

• Integrates two distinct biasing resistors (R1 ≠ R2) for simplified circuit design
• Utilizes epitaxial planar die construction for reliable performance
• Available in a compact SOT-323 surface mount case

Applications

• General-purpose switching applications
• Driver circuits for logic interfaces
• Inverter circuits requiring integrated biasing

Procurement Notes

Verify the specific ordering suffix '-7-F' corresponds to the tape and reel packaging configuration containing 3000 units per reel. Confirm that the 'Green' molding compound designation applies to products manufactured with date codes 0627 or newer, as earlier production runs may utilize different materials. Ensure compliance with RoHS requirements for the intended market.

Selection Notes

Select this component when a PNP digital transistor with unequal biasing resistors (4.7kΩ input, 22kΩ base-emitter) is required. Verify that the -100 mA collector current rating meets the load requirements. Consider the SOT-323 package dimensions for PCB layout constraints. Compare against complementary NPN types if both polarities are needed in the design.

Part Context

This part belongs to the DDTA series of PNP pre-biased transistors from Diodes Incorporated. It is specifically designed for applications where external biasing components would otherwise increase board space and assembly costs. The 'UA' suffix indicates the SOT-323 package style. It serves as a direct replacement for discrete resistor-transistor networks in similar form factors.

Replacement Considerations

Direct functional substitutes within the same family include DDTA143XUA-7-F and DDTA143ZUA-7-F, which share the SOT-323 package but feature different resistor ratios. For complementary NPN applications, consider the DDTC series. Verify pinout compatibility and thermal resistance characteristics before substitution.