STA485A

Overview

The STA485A is an NPN Darlington transistor manufactured by Sanken Electric USA Inc. It features a collector-emitter voltage (VCEO) of 100 V and a continuous collector current (IC) rating of 1 A. The device includes a built-in avalanche diode for protection. Key electrical characteristics include a DC current gain (hFE) ranging from 2000 to 10000 at IC=0.5A, and a saturation voltage (VCE(sat)) of 1.5 V maximum. Thermal performance specifies a junction temperature (Tj) of 150 °C and a storage temperature range of -40 to +150 °C. Internal resistors are typically R1: 5kΩ and R2: 400Ω.

Feature Summary

• NPN Darlington configuration with integrated avalanche diode
• High DC current gain suitable for amplification applications
• Robust thermal handling with 150°C junction temperature limit

Applications

• General-purpose switching circuits
• Amplifier stages requiring high gain
• Power control modules

Procurement Notes

Verify the component datasheet directly from Sanken Electric USA Inc. to confirm specifications. Ensure compatibility with circuit requirements regarding voltage and current ratings. Check for any specific handling instructions related to the 10-pin package. Confirm that the part meets all necessary safety standards for the intended application environment.

Selection Notes

Select this component for applications requiring high current gain and robust voltage handling. Consider the thermal dissipation capabilities when designing heat management solutions. Verify that the internal resistor values align with the biasing requirements of the target circuit. Ensure the operating conditions remain within the absolute maximum ratings specified in the datasheet.

Part Context

The STA485A belongs to Sanken's line of NPN Darlington transistors. It is designed for general-purpose use in electronic circuits. The device offers high reliability and performance in various industrial and consumer applications. Its construction supports efficient power control and signal amplification tasks.

Replacement Considerations

Consult official substitution guides from Sanken Electric USA Inc. for verified alternatives. Ensure replacement parts match the pinout, voltage ratings, and current capabilities. Verify thermal characteristics and package dimensions for physical compatibility.