DTD113EKT146

Overview

The DTD113EKT146 is a single NPN digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors for simplified circuit design. It supports a maximum collector current of 500 mA and a collector-emitter voltage of 50 V. The device incorporates thin-film resistors with R1 and R2 both set to 1 kOhm, yielding a resistor ratio of 1. Key electrical parameters include a minimum DC current gain (hFE) of 82 at 50 mA and 5 V, a transition frequency of 200 MHz, and a power dissipation rating of 200 mW. It operates within a temperature range up to +150°C and is housed in an SMT3 (SOT-23-3) surface-mount package.

Feature Summary

• Integrated bias resistors eliminate the need for external input components, enabling direct configuration of inverter circuits.
• Thin-film resistor construction provides complete isolation, allowing negative input biasing while minimizing parasitic effects.
• Simplified operation requires setting only on/off conditions, reducing complexity in circuit design.

Applications

• Switching circuits
• Inverter circuits
• Interface circuits
• Driver circuits

Procurement Notes

Verify the specific suffix KT146 to confirm the tape-and-reel packaging format and quantity. Ensure compatibility with RoHS standards if required by the target assembly process. Cross-reference the manufacturer datasheet for handling precautions related to the SMT3 package and thermal management during soldering.

Selection Notes

Select this component when a compact NPN solution with integrated biasing is required for high-speed switching applications. The 500 mA current capacity and 200 MHz frequency response suit interface and driver roles. Verify that the 1 kOhm internal resistance values align with the driving source impedance requirements.

Part Context

This part belongs to the DTD113EK series of digital transistors from ROHM. It serves as an NPN counterpart to PNP variants like the DTB113EK. The series is designed for space-constrained designs where external biasing resistors would otherwise increase board footprint and component count.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate other ROHM digital transistors with similar 50V/500mA ratings and SMT3 packaging for potential pin-compatible alternatives.