DTA143E

Overview

The DTA143E is a PNP digital transistor manufactured by onsemi, featuring an integrated monolithic bias resistor network. It combines a single PNP silicon transistor with two internal resistors: a series base resistor (R1) and a base-emitter resistor (R2), both specified at 4.7 kOhms. The device supports a maximum collector current of 100 mA and a collector-emitter breakdown voltage of 50 V. With a power dissipation rating of 260 mW, it is designed for surface-mount applications in the SOT-723 package. The component offers a minimum DC current gain (hFE) of 15 at 5 mA and 10 V, ensuring reliable switching performance while reducing external component count.

Feature Summary

• Integrates a PNP transistor with dual bias resistors to replace discrete components
• Simplifies circuit design by eliminating external biasing network requirements
• Reduces printed circuit board space through compact surface-mount packaging

Applications

• General-purpose switching circuits requiring simplified biasing
• Interface logic level translation between microcontrollers and loads
• Driver stages for relays or small signal loads in consumer electronics

Procurement Notes

Verify the specific suffix (e.g., EM3T5G) against the required datasheet revision and RoHS compliance status. Confirm package availability matches the target PCB footprint. Ensure the supplier provides traceability documentation consistent with onsemi manufacturing standards. Check for automotive-grade variants if operating conditions exceed commercial specifications.

Selection Notes

Select this component when a PNP switching solution with fixed 4.7 kOhm bias resistors is required. Compare hFE and saturation voltage parameters against load requirements. Consider the SOT-723 thermal characteristics for power dissipation limits. Evaluate alternative packages like SOT-416 if higher reliability or different pinout compatibility is needed for the assembly process.

Part Context

The DTA143E belongs to onsemi's Bias Resistor Transistor (BRT) family, designed to simplify analog and digital switching designs. This series integrates passive components directly onto the semiconductor die, offering a compact alternative to discrete BJT configurations. The product line supports various packaging options to accommodate different manufacturing and spatial constraints in modern electronic assemblies.

Replacement Considerations

Direct substitutes include DTA143EET1G and DTA143EM3T5G from onsemi, which share identical electrical characteristics and pinouts. Automotive-grade alternatives such as DTA143EE3HZG are available for enhanced reliability requirements. Verify that any replacement maintains the same R1/R2 resistance values and polarity.