DTA124EKAT146

Overview

The DTA124EKAT146 is a single 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 -30 mA (rated up to -100 mA in some specifications). The device integrates an input resistor (R1) of 22 kΩ and an emitter-base resistor (R2) of 22 kΩ, resulting in a typical resistance ratio of approximately 1. Packaged in the SMT3 (SOT-23-3) surface-mount format, it offers a power dissipation capacity of 200 mW and a transition frequency of 250 MHz. The component supports a wide operating temperature range from -55°C to +150°C.

Feature Summary

• Integrates PNP transistor with dual internal resistors (R1 and R2) to eliminate external biasing components.
• Provides high-speed switching capability with a transition frequency of 250 MHz.
• Features low saturation voltage for efficient signal switching and drive applications.
• Designed for compact surface-mount layouts using the standard SMT3 package.

Applications

• Microcontroller I/O port interface and level shifting circuits.
• Driver circuits for relays, LEDs, and MOSFET gates.
• Digital signal processing and logic buffer applications.
• Portable electronic devices requiring space-saving power control solutions.

Procurement Notes

Verify the specific suffix T146 confirms the tape-and-reel packaging configuration intended for automated assembly processes. Ensure the order matches the required quantity multiples defined by the manufacturer's standard taping specifications. Confirm RoHS compliance status if environmental regulations apply to the final product assembly. Cross-reference the datasheet revision date to ensure compatibility with current design constraints.

Selection Notes

Select this component when a pre-biased PNP solution is required to reduce PCB footprint and simplify schematic design. The 22 kΩ internal resistor values are suitable for standard logic-level driving currents. Consider the -50 V rating and 200 mW power dissipation limits against the expected load conditions. Verify that the SMT3 package dimensions fit within the available board space constraints compared to larger packages like SOT-89.

Part Context

This part belongs to the DTA124 series of digital transistors from ROHM, which are designed as direct replacements for discrete transistor-resistor networks. The 'EKA' designation typically refers to the specific resistor combination and package type within the broader family. These devices are widely used in consumer electronics and industrial control systems where space efficiency and simplified manufacturing are prioritized over discrete component assembly.

Replacement Considerations

Compatible substitutes include other ROHM PNP digital transistors with similar 22 kΩ/22 kΩ resistor ratios and SOT-23 packaging, such as the DTA124XE series variants. Ensure any replacement maintains the same pinout configuration and electrical ratings, particularly the -50 V breakdown voltage and 200 mW power dissipation capabilities.