DDTD123EU-7-F

Overview

The DDTB123EU-7-F is a pre-biased NPN transistor in an SOT-323 package. It integrates biasing resistors with nominal values of R1=2.2kΩ and R2=2.2kΩ. Key electrical parameters include a collector-emitter breakdown voltage (BVCEO) of 50V, a continuous collector current (IC) of 500mA, and a power dissipation (PD) of 250mW. The device features a minimum DC current gain (hFE) of 39 and operates within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates built-in biasing resistors for simplified circuit design
• Utilizes epitaxial planar die construction for reliability
• Surface-mount package optimized for automated assembly

Applications

• Switching applications requiring integrated base drive
• Driver circuits for low-power loads
• Logic interface buffering

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm availability status. Check for any recent product discontinuance notifications or lifecycle changes before finalizing procurement plans. Ensure compliance with RoHS and halogen-free requirements as specified in the datasheet.

Selection Notes

Select this component when a single NPN transistor with fixed 2.2kΩ biasing resistors is required. Confirm that the 50V collector-emitter voltage rating meets the application's maximum supply voltage. Verify that the 500mA continuous current capability aligns with the load requirements.

Part Context

This part belongs to the DDTB series of pre-biased transistors manufactured by Diodes Incorporated. It is designed to replace discrete resistor-transistor networks, reducing board space and assembly complexity. The SOT-323 package provides a compact footprint suitable for portable electronics.

Replacement Considerations

Check for active equivalents such as DDTB123YU-7-F or DDTB123TU-7-F if the EU variant is obsolete. Verify resistor ratios and hFE specifications match the original design requirements before substitution.