STA406A

Overview

The STA406A is an NPN Darlington transistor manufactured by Sanken Electric USA Inc., housed in a 10-pin STA package. It features a collector-emitter voltage (VCEO) of 60±10 V and a continuous collector current (IC) rating of 6 A. The device integrates internal base resistors, typically R1 at 3 kΩ and R2 at 150 Ω, to facilitate direct drive from logic circuits. Key electrical characteristics include a DC current gain (hFE) ranging from 2000 to 15000 at IC=3A and VCE=2V, with a maximum saturation voltage (VCE(sat)) of 1.5 V. It supports a junction temperature up to 150°C and includes a built-in avalanche diode for robust operation.

Feature Summary

• Integrated NPN Darlington configuration with built-in avalanche protection
• Internal base resistors enable simplified logic interface design
• High current gain suitable for low-drive applications

Applications

• Logic-to-power switching interfaces
• Relay driver circuits
• Motor control stages

Procurement Notes

Verify the specific datasheet revision and ordering suffixes directly with Sanken Electric or authorized distributors. Confirm that the 10-pin STA package dimensions and pinout match the target PCB footprint. Ensure compliance with RoHS directives if required for the specific manufacturing environment.

Selection Notes

Select this component when high current gain and integrated pull-down/pull-up resistors are required to simplify driver circuitry. Consider the 60 V voltage rating and 6 A current capacity against load requirements. Evaluate thermal management needs based on the power dissipation limits and ambient operating conditions.

Part Context

This part belongs to Sanken's STA series of Darlington transistors designed for high-gain switching applications. The STA package provides a compact form factor with multiple pins for improved thermal performance and electrical isolation compared to standard TO-220 packages.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.