DTA143Z

Overview

The onsemi DTA143Z is a single PNP digital transistor featuring integrated biasing resistors, housed in an SOT-723 surface-mount package. It supports a maximum collector-emitter voltage of 50 V and a continuous collector current of 100 mA, with a power dissipation rating of 260 mW. The device incorporates a base resistor (R1) of 4.7 kOhms and an emitter-base resistor (R2) of 47 kOhms. DC current gain (hFE) is specified at a minimum of 80 when tested at Ic=5mA and Vce=10V. The saturation voltage (Vce(sat)) is limited to 250 mV under conditions of Ib=300µA and Ic=10mA, while the collector cutoff current remains below 500 nA.

Feature Summary

• Integrates internal biasing resistors to simplify circuit design by eliminating external components.
• Provides high-density packaging suitable for space-constrained surface-mount applications.
• Offers stable switching performance with defined saturation voltage characteristics.

Applications

• General-purpose switching circuits
• Interface logic level translation
• Driver stages for low-power loads

Procurement Notes

Verify the specific suffix against the manufacturer's official datasheet to confirm exact electrical tolerances and packaging options. Ensure the component meets required RoHS compliance standards for the target market. Cross-reference the full part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component for designs requiring a compact PNP switch with built-in pull-down and base resistance. Verify that the 50V voltage rating and 100mA current capacity align with the load requirements. Consider the SOT-723 footprint constraints during PCB layout planning to ensure adequate thermal dissipation for the 260 mW power rating.

Part Context

This device belongs to the DTA143 series of pre-biased transistors from onsemi. It serves as a discrete solution for replacing multiple discrete components, reducing board space and assembly costs. The SOT-723 package provides a small outline compared to traditional through-hole alternatives, facilitating automation in high-volume manufacturing processes.

Replacement Considerations

Compatible substitutes include the DTA143TM3T5G and DTA143ZE3HZG. Verify pinout compatibility and electrical parameter equivalence before substitution. Confirm that alternative packages meet the same thermal and mechanical constraints.