DDTC144TCA-7

Overview

The DDTC144TCA-7 is an NPN pre-biased small signal transistor manufactured by Diodes Incorporated. It features a single built-in biasing resistor (R1) with a nominal value of 47 kOhms and a tolerance of ±30%. The device is housed in a surface-mount SOT23 package. Key electrical parameters include a maximum collector-emitter voltage (VCEO) of 50 V, a continuous collector current (IC) of 100 mA, and a power dissipation (PD) of 200 mW at +25°C. The DC current transfer ratio (hFE) ranges from 100 to 600 at IC = 1mA, VCE = 5V. The transition frequency (fT) is typically 250 MHz. Operating temperature range spans from -55°C to +150°C.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated base resistor simplifies circuit design by reducing component count
• Totally lead-free and fully RoHS compliant manufacturing
• Halogen and antimony free "Green" device composition

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, as variations such as '-F' may indicate tape-and-reel packaging or specific compliance standards. Confirm that the required quantity matches standard factory packing quantities, typically 3,000 units per reel for this series. Ensure compatibility with automated pick-and-place equipment due to the SOT23 surface-mount form factor.

Selection Notes

Select this component when a single NPN transistor with a fixed 47 kOhm base resistor is required. Compare hFE and saturation voltage specifications against load requirements. Verify thermal management needs, as power dissipation is limited to 200 mW. Consider complementary PNP types from the DDTA series if push-pull configurations are necessary.

Part Context

This part belongs to the DDTC R1-ONLY SERIES CA family from Diodes Incorporated. It shares the same physical package and general characteristics as other variants in the series, distinguished primarily by the internal resistor value. The 'CA' suffix denotes the specific product line revision and marking code configuration.

Replacement Considerations

Direct substitutes within the same manufacturer's portfolio include other DDTC144 variants with different resistor values if the resistance requirement changes. Cross-manufacturer equivalents should be evaluated based on matching VCEO, IC, and package dimensions.