DTC143ZUA-HF

Overview

The DTC143ZUA-HF is an NPN digital transistor manufactured by Comchip Technology, designed for surface-mount applications. It integrates a single NPN epitaxial planar die with built-in biasing resistors in a compact SOT-323 package. The device operates with a maximum collector-emitter voltage of 50 V and a continuous collector current of 100 mA. Typical internal resistor values are R1 at 4.7 kΩ and R2 at 47 kΩ, providing a fixed gain configuration. The component supports a power dissipation of 200 mW and functions within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates NPN transistor with built-in biasing resistors (R1=4.7kΩ, R2=47kΩ) to simplify circuit design.
• Utilizes epitaxial planar die construction for reliable performance in surface-mount applications.
• Provides high DC current gain (hFE) ranging from 80 to 600 for effective signal switching.

Applications

• General-purpose switching circuits
• Driver circuits for logic interfaces
• Inverter configurations without external input resistors

Procurement Notes

Verify the specific ordering suffix against official Comchip Technology documentation to confirm exact packaging and tape-and-reel specifications. Ensure compliance with RoHS directives as indicated in product listings. Confirm availability status directly with authorized distributors, as supply levels fluctuate. Cross-reference the manufacturer part number with ECAD models prior to PCB layout finalization.

Selection Notes

Select this component when a compact NPN solution with integrated biasing is required for space-constrained designs. The SOT-323 package offers a smaller footprint compared to standard SOT-23 variants. Verify that the 50V voltage rating and 100mA current capacity meet the specific load requirements of the target application circuit.

Part Context

This part belongs to the DTC143 series of digital transistors from Comchip Technology. It serves as a complementary or alternative option to other series members like DTC143ZE3HZG, differing primarily in package type (SOT-323 vs SOT-416/EMT3). The series is characterized by built-in resistors that reduce component count and board space in switching applications.

Replacement Considerations

The DTC143ZE3HZG is listed as a similar level replacement with the same pinout and package dimensions (SOT-323/SC-70). Both parts share identical electrical characteristics, including 50V VCEO, 100mA IC, and the same resistor ratios (4.7kΩ/47kΩ). Verify package compatibility before substitution.