CYTA4494D TR

Overview

The CYTA4494D TR is a dual, isolated NPN transistor manufactured by Central Semiconductor Corp. It utilizes the SOT-228 eight-lead surface-mount package to provide high voltage and high current capabilities in a compact form factor. The device contains two separate NPN silicon elements within a single plastic/epoxy rectangular small outline housing. Key electrical specifications include a maximum collector current of 0.3 A, a collector-emitter breakdown voltage of 400 V, and a minimum DC current gain (hFE) of 50. The component supports a maximum operating temperature of 150 °C and has an absolute maximum power dissipation rating of 2 W.

Feature Summary

• Dual transistors integrated into a new SOT-228 eight-lead surface-mount case
• High voltage and high current device performance
• Utilizes 50% less board space compared to two individual SOT-223 devices

Applications

• High voltage switching circuits
• Power management applications requiring compact dual transistor solutions
• Industrial equipment utilizing surface mount technology

Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging when sourcing from distributors. Confirm RoHS compliance status directly with the manufacturer or authorized suppliers, as packaging variations may affect environmental certifications. Ensure the ordering quantity aligns with the reel specifications provided by the vendor to avoid partial reel handling issues during assembly.

Selection Notes

Select this component for designs requiring two isolated NPN transistors in a single footprint to minimize PCB area. Compare the 400V collector-emitter voltage and 0.3A current limits against circuit requirements. Consider the SOT-228 thermal characteristics and 2W power dissipation capability for heat management. Verify that the 150°C maximum operating temperature meets the system's environmental constraints.

Part Context

This part belongs to a series of dual transistors from Central Semiconductor, including the CYTA44D and CYT5551D, all packaged in the SOT-228 case. These devices are designed to replace discrete components, offering space savings over traditional packages like SOT-223. The product line focuses on providing high-performance dual configurations for modern surface-mount assembly processes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Central Semiconductor's legacy device cross-reference or contact their sales team for potential equivalents if discontinuation occurs.