DDTC144EUAQ-7-F

Overview

The DDTC144EUAQ-7-F is an NPN pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features built-in biasing resistors with nominal values of R1 = 47 kOhms and R2 = 47 kOhms. The device operates with a maximum supply voltage (VCC) of 50 V and a continuous collector current (IC) of 100 mA. Electrical characteristics include a DC current gain (hFE) of 68 at VO = 5V, IO = 5mA, and a transition frequency (fT) of 250 MHz. Power dissipation is rated at 200 mW, with an operating temperature range from -55°C to +150°C. It is housed in an SOT-323 package.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Built-in biasing resistors (R1 = R2) simplify circuit design
• Qualified to AEC-Q101 standards for high reliability
• Totally lead-free and fully RoHS compliant

Applications

• Automotive electronic systems requiring AEC-Q101 qualified components
• General-purpose switching applications utilizing integrated biasing
• Surface mount assembly processes compatible with SOT-323 packaging

Procurement Notes

Verify the specific ordering suffix '-7-F' corresponds to the 7-inch reel size containing 3,000 units per reel as documented in the manufacturer's ordering information table. Confirm that the 'Q' designation indicates automotive qualification status consistent with AEC-Q101 requirements. Ensure compatibility with standard surface mount assembly equipment for the SOT-323 case outline dimensions.

Selection Notes

Select this component when an NPN digital transistor with equal base and emitter resistors (47k Ohm each) is required. The 47k Ohm resistor value results in a specific input current characteristic suitable for particular logic drive levels. Consider the 200 mW power dissipation limit and the 50 V supply voltage rating against the application's electrical demands. The SOT-323 package offers a compact footprint for space-constrained designs.

Part Context

This part belongs to the DDTC (R1 = R2 Series) UA family of NPN pre-biased transistors. It shares the same electrical and thermal characteristics as the non-automotive DDTC144EUA-7-F variant, differing primarily in its automotive qualification status. The complementary PNP type within this series is designated as DDTA144EUAQ-7-F.

Replacement Considerations

The DDTC144EUA-7-F serves as a direct functional substitute with identical electrical specifications but lacks the explicit automotive qualification marking. Other members of the DDTC144 series may be considered if different resistor values are acceptable.