DDTC143ZUA-7-F

Overview

The DDTC143ZUA-7-F is a 50V NPN pre-biased transistor manufactured by Diodes Incorporated in an SOT323 package. It integrates biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 47 kΩ. The device supports a maximum collector current of 100 mA and a supply voltage of 50 V, with a power dissipation rating of 200 mW. Key electrical characteristics include a minimum DC current gain (hFE) of 80 at 10 mA output current, a transition frequency (fT) of 250 MHz, and an operating temperature range from -55°C to +150°C.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Built-in biasing resistors simplify circuit design
• Surface mount package suited for automated assembly

Applications

• Inverter circuits without external input resistors
• Switching applications requiring high-speed operation
• Automotive electronics compatible with IATF 16949 facilities

Procurement Notes

Verify the specific part number against official Diodes Incorporated documentation to ensure correct resistor ratios and package type. Confirm RoHS compliance and lead-free status requirements for your manufacturing process. Check for automotive qualification standards if used in safety-related systems. Ensure ordering suffixes match the required packaging quantity and carrier type.

Selection Notes

Select this component when a compact NPN solution with integrated biasing is needed. The 4.7kΩ/47kΩ resistor ratio suits applications requiring moderate input drive currents. Consider the SOT323 package size constraints and thermal resistance limits during PCB layout. Verify that the 100mA continuous current rating meets the load requirements.

Part Context

This part belongs to the DDTC series of pre-biased transistors from Diodes Incorporated. It is designed as a drop-in replacement for discrete resistor-transistor networks. The UA suffix indicates the SOT323 surface-mount package. The -7-F suffix denotes the standard reel packaging format.

Replacement Considerations

Direct substitutes within the same family include DDTC143XUA-7-F and DDTC143FUA-7-F, which share the same package but differ in internal resistor values. Cross-manufacturer equivalents should be verified for pinout compatibility and electrical parameter matching.