DDTC144TCA-7-F

Overview

The DDTC144TCA-7-F is an NPN pre-biased transistor from Diodes Incorporated, housed in a SOT23 package. It features a built-in base resistor (R1) of 47 kΩ with a tolerance of ±30%. The device supports a maximum collector current of 100 mA and withstands collector-emitter voltages up to 50 V. Power dissipation is rated at 200 mW, with a thermal resistance of 625 °C/W. The DC current transfer ratio (hFE) ranges from 100 to 600 at IC = 1 mA, VCE = 5 V. The transition frequency (fT) is typically 250 MHz. Operating temperatures span from -55°C to +150°C.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated single biasing resistor simplifies circuit design
• Totally lead-free and fully RoHS compliant
• Halogen and antimony free "Green" device

Applications

• Switching applications requiring simplified bias networks
• Driver circuits for low-power loads
• General-purpose digital logic interfacing

Procurement Notes

Verify the specific ordering suffix against official documentation to ensure correct packaging and marking codes. Confirm compliance requirements such as RoHS 3 and REACH status prior to procurement. Check for any product change notifications that may affect mechanical or electrical specifications. Ensure storage conditions adhere to moisture sensitivity level 1 guidelines.

Selection Notes

Select this component when a single NPN transistor with a fixed 47 kΩ base resistor is required. Compare hFE ranges and saturation voltages against load requirements. Verify power dissipation limits under actual operating ambient temperatures using the derating curve. Consider complementary PNP types if symmetrical switching is needed.

Part Context

This part belongs to the DDTC R1-only series, which integrates a single biasing resistor into an NPN pre-biased transistor. The series offers various resistor values to accommodate different drive currents. The DDTC144TCA variant specifically provides a 47 kΩ input resistor, balancing drive capability and standby current consumption.

Replacement Considerations

Direct replacements must match the NPN polarity, SOT23 package, and 47 kΩ internal resistor value. Verify that alternative components meet the 50 V voltage rating and 100 mA current capacity. Check for equivalent thermal characteristics and hFE ranges to ensure circuit compatibility.