DTB143EKFRAT146

Overview

The DTB143EKFRAT146 is a PNP digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors to simplify circuit design. It operates with a maximum collector-emitter voltage of -50 V and a continuous collector current of -500 mA. The device includes an internal base resistor (R1) of 4.7 kOhms and an emitter-base resistor (R2) of 4.7 kOhms, resulting in a typical resistance ratio of 1. Packaged in an SOT-346-3 (SMT3) surface-mount format, it supports a power dissipation of 200 mW and functions up to a maximum operating temperature of +150°C. The component holds AEC-Q101 automotive qualification but carries an NRND status.

Feature Summary

• Integrates dual bias resistors to eliminate external components for basic switching applications
• Automotive-grade reliability certified under the AEC-Q101 standard
• High thermal stability supporting operation at junction temperatures up to 150°C

Applications

• Automotive logic level shifting circuits
• General-purpose signal inversion stages
• Driver interfaces for low-power actuators

Procurement Notes

Verify current availability as the component is designated Not Recommended for New Designs. Confirm specific ordering suffixes match required packaging formats. Check for active replacement recommendations from the manufacturer before finalizing procurement plans.

Selection Notes

Select this part for PNP switching requirements within 50V limits. Ensure input drive currents align with the 4.7 kOhm base resistor value. Consider alternative NPN models if positive logic control is preferred over negative logic configurations.

Part Context

This component belongs to the DTB143EK series of pre-biased transistors. It shares the same core transistor characteristics with variants like DTB143EKT146, differing primarily in packaging or taping specifications. The FRAT suffix indicates specific reel handling requirements.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult official manufacturer channels for approved obsolescence alternatives.