DDC143ZU-7-F

Overview

The DDC143ZU-7-F is an NPN pre-biased small signal dual surface mount transistor manufactured by Diodes Incorporated. It features built-in biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 47 kΩ. The device operates within a supply voltage range up to 50 V and supports a continuous collector current of 100 mA. Power dissipation is rated at 200 mW, with a thermal resistance (junction to ambient) of 625 °C/W. Transition frequency reaches 250 MHz under standard test conditions. The component is housed in a SOT-363 package, weighs approximately 0.006 grams, and functions reliably across an operating temperature range from -55°C to +150°C.

Feature Summary

• Integrated dual NPN transistors with built-in biasing resistors for simplified circuit design
• Epitaxial planar die construction ensuring stable performance characteristics
• Qualified for automotive applications through AEC-Q101 standards and PPAP capability

Applications

• Automotive electronic systems requiring specific change control protocols
• General-purpose switching and amplification circuits utilizing surface mount technology
• Digital logic interfacing where integrated biasing reduces external component count

Procurement Notes

Verify the active status and RoHS compliance before procurement. Confirm that the SOT-363 package dimensions align with your PCB footprint requirements. Ensure the 200 mW power dissipation rating accommodates your thermal management strategy. Check for any specific automotive qualification documentation if deploying in regulated environments.

Selection Notes

Select this component when a dual NPN configuration with fixed internal biasing is required. The 4.7 kΩ input resistor suits moderate drive currents, while the 47 kΩ base resistor aids in leakage reduction. Consider the 50 V breakdown voltage limit for high-side or low-side switching applications. Verify that the 100 mA continuous current capacity meets load demands without exceeding thermal limits.

Part Context

This part belongs to the DDC(XXXX)U series of pre-biased transistors from Diodes Incorporated. It shares the SOT-363 package and epitaxial construction with other variants like the DDC143XU and DDC123JU. The series offers complementary PNP types and various resistor combinations to support diverse digital switching needs in compact form factors.

Replacement Considerations

Direct substitutes include other DDC143ZU variants with identical electrical parameters. For single-transistor applications, consider the DDTC143XE-7-F. If different biasing ratios are acceptable, explore DDC143XU-7-F or DDC123JU-7-F within the same family.