NCV8402ASTT3G

Overview

The NCV8402ASTT3G is a self-protected low-side power switch manufactured by onsemi, designed for automotive and industrial applications. It integrates an N-channel MOSFET with control logic in a SOT-223 package. The device supports a maximum load voltage of 42V and delivers a continuous output current of 2A. Key electrical parameters include a typical on-resistance of 165 mΩ and a threshold voltage of 1.3V. It operates within a junction temperature range of -40°C to 150°C and complies with AEC-Q100 standards.

Feature Summary

• Integrates overvoltage protection, overtemperature shutdown, and fixed current limiting with auto-restart functionality.
• Features a non-inverting open/switch interface for direct connection to microcontroller or logic outputs.
• Provides short-circuit protection through thermal and current limit mechanisms to safeguard the load.

Applications

• Automotive lighting systems including interior, exterior, and dashboard illumination.
• Solenoid and relay driver circuits in vehicle body electronics.
• General purpose low-side switching for high-current loads in industrial equipment.

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and tape-and-reel specifications. Ensure the component meets AEC-Q100 qualification requirements for your target application environment. Cross-reference datasheet revisions to confirm pinout compatibility and electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component when a single-channel low-side switch with integrated protection is required. It is suitable for loads drawing up to 2A at 42V. Consider alternative packages if board space constraints differ from the SOT-223 footprint. Evaluate thermal management needs based on the specified power dissipation and ambient operating conditions.

Part Context

This part belongs to the NCV8402 family of smart power switches from onsemi. The family includes variants with different packaging options such as SOIC and SOT-223. These devices are engineered to replace discrete MOSFETs and driver circuits, offering a compact solution for protecting sensitive loads in harsh environments.

Replacement Considerations

Direct substitutes include NCV8402ASTT1G which shares identical electrical characteristics but utilizes a reel packaging format instead of cut tape. Verify that any replacement maintains the same SOT-223-3 pinout and protection features to ensure circuit compatibility without redesign.