DTB143TKT146

Overview

The DTB143TKT146 is a PNP digital transistor manufactured by Rohm Semiconductor, belonging to the DTB143EK series. It integrates a single PNP bipolar junction transistor with built-in bias resistors (R1 and R2) in an SMT3 surface-mount package. Key electrical parameters include a collector-emitter voltage of -50 V, a continuous collector current of -500 mA, and a maximum power dissipation of 200 mW. The device features a typical base resistance of 4.7 kOhms, a DC current gain (hFE) minimum of 47 at 50 mA and 5 V, and a transition frequency of 200 MHz.

Feature Summary

• Integrates a PNP transistor with dual internal bias resistors for simplified circuit design
• Provides high-speed switching capability with a 200 MHz transition frequency
• Supports moderate load currents up to 500 mA in a compact surface-mount footprint

Applications

• General-purpose switching applications requiring integrated biasing
• Driver circuits for small-signal loads in consumer electronics
• Logic interface buffering between microcontrollers and peripheral devices

Procurement Notes

Verify the exact suffix against official Rohm documentation to confirm resistor values and packaging specifications. Confirm availability status as distribution data may vary. Ensure the component meets required automotive or industrial qualification standards if applicable to the target application environment.

Selection Notes

Select this component when a PNP configuration with 4.7 kOhm bias resistors is required. Compare against NPN alternatives like DTD143EKT146 if polarity differs. Consider the SMT3 package constraints for PCB layout and thermal management relative to the 200 mW power dissipation limit.

Part Context

This part belongs to the DTB143EK family of digital transistors from Rohm Semiconductor. The series offers various configurations with different resistor ratios and polarities. The DTB143 variant specifically denotes a PNP type with standard 4.7 kOhm bias resistors, distinguishing it from other variants in the same physical package family.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with equivalent PNP digital transistors having matching voltage, current, and resistor specifications before substitution.