DDTC143FUA-7-F

Overview

The DDTC143FUA-7-F is a 50V NPN pre-biased transistor manufactured by Diodes Incorporated in an SOT323 package. It integrates built-in biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 22 kΩ, resulting in a resistance ratio of approximately 4.68. The device supports a maximum continuous collector current of 100 mA and dissipates up to 200 mW of power. Key electrical characteristics include a minimum DC current gain (hFE) of 68 at VOUT = 5V and IOUT = 10mA, and a gain-bandwidth product (fT) of 250 MHz. The component operates within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates NPN bipolar transistor with two distinct biasing resistors for simplified circuit design
• Utilizes epitaxial planar die construction for reliable performance
• Surface mount SOT323 package optimized for automated assembly processes
• Manufactured using halogen-free and antimony-free green materials

Applications

• Switching applications requiring integrated base drive components
• Driver circuits for low-power loads or logic level translation
• Automotive electronics systems compatible with AEC-Q100 standards

Procurement Notes

Verify the specific part number suffix against official manufacturer documentation to ensure correct resistor ratios and packaging specifications. Confirm compliance requirements such as RoHS and lead-free status directly with the supplier. Check for automotive qualification certifications if the application demands AEC-Q100 standards. Validate that the sourcing channel is authorized to prevent counterfeit components.

Selection Notes

Select this component when a single NPN transistor with specific unequal biasing resistors is required to reduce board space and assembly steps. The 4.7kΩ input resistor suits moderate drive currents, while the 22kΩ feedback resistor sets the specific biasing ratio. Ensure the application voltage does not exceed the 50V collector-emitter rating and that thermal dissipation remains within the 200mW limit.

Part Context

This component belongs to the DDTC (R1≠R2 SERIES) UA family from Diodes Incorporated. The series offers various combinations of NPN transistors with different internal resistor values housed in the compact SOT323 package. The 'UA' suffix denotes the specific SOT323 surface-mount configuration used for high-density PCB layouts.

Replacement Considerations

Direct substitutes within the same family include DDTC143XUA-7-F (4.7kΩ/10kΩ) and DDTC143ZUA-7-F (4.7kΩ/47kΩ). Verify that alternative part numbers match the required resistance ratio and current handling capabilities before substitution.