DTA114YKAT146

Overview

The DTA114YKAT146 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 -100 mA. The device integrates an input resistor (R1) of 10 kΩ and an emitter-base resistor (R2) of 4.7 kΩ, resulting in a typical resistance ratio of approximately 4.7. Packaged in the compact SOT-346 (TO-236AB) surface-mount format, it supports a maximum power dissipation of 200 mW and functions reliably within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates PNP transistor with dual internal resistors for simplified biasing
• Eliminates external discrete components to reduce PCB footprint
• Provides stable switching performance with high thermal stability

Applications

• Digital signal interface circuits and level shifting
• Microcontroller I/O port driving and protection
• Low-power switching applications for LEDs or relays

Procurement Notes

Verify the specific suffix KAT146 against official ROHM documentation to confirm tape-and-reel packaging quantities and RoHS compliance status. Ensure the ordering code matches the required resistance values and package type before procurement. Cross-reference distributor part numbers with manufacturer datasheets to avoid substitution errors.

Selection Notes

Select this component when a PNP digital transistor with a 10 kΩ input resistor and 4.7 kΩ emitter-base resistor is required. The SOT-346 package suits space-constrained designs. Verify that the -50 V voltage rating and -100 mA current capacity meet the load requirements. Confirm compatibility with the target operating temperature range up to +150°C.

Part Context

This part belongs to the DTA114 series of pre-biased transistors from ROHM. The series offers various resistance combinations and packages. The DTA114Y variant specifically denotes the PNP polarity with defined internal resistor ratios, distinguishing it from other series members like DTA114E or DTA114T which may have different configurations.

Replacement Considerations

Check ROHM's official replacement list for discontinued or obsolete variants. Compatible substitutes must match the PNP polarity, -50 V rating, -100 mA current, and similar internal resistor values (10 kΩ / 4.7 kΩ). Verify pinout compatibility in the SOT-346 package before substitution.