DTB123EKT146

Overview

The DTB123EKT146 is a PNP pre-biased digital transistor manufactured by ROHM Semiconductor. It integrates internal biasing resistors to simplify circuit design. The device features a collector continuous current of 500 mA and a maximum operating frequency of 200 MHz. Key electrical parameters include a DC current gain (hFE) minimum of 39 at 50 mA and 5 V, and a collector-emitter saturation voltage of 300 mV at 2.5 mA base current and 50 mA collector current. Power dissipation is rated at 200 mW. The component utilizes an SMT3 package, equivalent to TO-236-3 or SC-59, with built-in R1 and R2 resistors each valued at 2.2 kOhms.

Feature Summary

• Integrates dual biasing resistors (R1 and R2) to eliminate external resistor requirements for inverter circuits.
• Designed for surface-mount technology using the compact SMT3 package.
• Supports high-speed switching applications with a transition frequency of 200 MHz.

Applications

• Inverter circuits requiring simplified input stages.
• General-purpose switching applications in consumer electronics.
• Driver circuits for low-current loads.

Procurement Notes

Verify the specific suffix T146 corresponds to the required tape-and-reel packaging configuration. Confirm AEC-Q101 automotive qualification status if the application demands it, as standard variants may differ. Ensure the SMT3 footprint matches the PCB layout constraints. Cross-reference the manufacturer part number against official datasheets to confirm pinout compatibility before integration.

Selection Notes

Select this component when a PNP digital transistor with 500 mA capacity and 2.2 kOhm internal biasing is required. Compare hFE specifications against load requirements to ensure adequate drive capability. Verify that the 200 mW power dissipation rating suits the thermal environment. Consider the SMT3 package dimensions for space-constrained designs.

Part Context

This part belongs to the DTB123EK series of pre-biased transistors from ROHM. The series offers various resistor combinations and polarities. The DTB123EKT146 specifically denotes the PNP variant with 2.2 kOhm resistors in the SMT3 package. It serves as a direct replacement for discrete resistor-transistor networks in logic interfaces.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative PNP digital transistors having similar hFE, Vce(sat), and package dimensions before substitution.