STA403A

Overview

The STA403A is a general-purpose NPN Darlington transistor array manufactured by Sanken Electric USA Inc. It features four independent NPN Darlington pairs housed in a 10-SIP through-hole package. The device supports a maximum collector current of 4 A and a collector-emitter voltage of 100 V. Key electrical characteristics include a DC current gain (hFE) of 1000 at 2 A, saturation voltage of 2.0 V, and power dissipation up to 4 W. Operating junction temperature reaches 150°C, with storage range from -40°C to +150°C.

Feature Summary

• Contains four independent NPN Darlington pairs for versatile switching applications
• High current handling capability suitable for driving loads up to 4 A
• Robust thermal performance with high junction temperature rating

Applications

• General purpose switching circuits
• Relay driver applications
• Motor control interfaces

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct packaging and variant selection. Confirm that the 10-SIP through-hole package matches your PCB footprint requirements. Cross-reference the absolute maximum ratings with your system's operational limits to prevent device failure under transient conditions.

Selection Notes

Select this component when multiple isolated NPN Darlington outputs are required within a single package. Ensure the application voltage does not exceed the 100 V collector-emitter breakdown. Verify that the load current remains within the 4 A continuous limit and consider thermal management strategies if operating near the 4 W power dissipation limit.

Part Context

The STA403A belongs to Sanken's STA series of NPN Darlington transistor arrays. This series is designed for general-purpose use, offering integrated solutions for multi-channel switching tasks. The 10-pin SIP configuration allows for easy integration into legacy and modern through-hole designs requiring compact multi-transistor functionality.

Replacement Considerations

Consult the manufacturer's official cross-reference documentation for verified substitute part numbers. Ensure any replacement maintains the 10-SIP package and equivalent electrical ratings, specifically the 100 V VCEO and 4 A IC specifications.