NCV8403STT3G

Overview

The NCV8403STT3G is a single-channel, N-channel low-side intelligent power switch manufactured by onsemi. It integrates a MOSFET with comprehensive protection features in an SOT-223-4 package. Key electrical parameters include a drain-source breakdown voltage (Vds) of 42 V and a continuous drain current (Id) of 15 A. The device exhibits a maximum on-resistance (Rds(on)) of 53 mΩ. It operates within a junction temperature range of -40 °C to +150 °C and supports logic levels compatible with 3.3 V and 5 V inputs.

Feature Summary

• Integrates overcurrent protection with fixed current limiting and short-circuit withstand capability
• Includes thermal shutdown functionality that automatically restarts upon cooling
• Features internal clamp circuitry to suppress inductive load voltage spikes
• Provides enhanced dV/dt immunity for improved system stability

Applications

• Automotive lighting systems
• Relay and solenoid driving
• Small motor control applications

Procurement Notes

Verify the specific suffix STT3G against the manufacturer's official datasheet to confirm the tape-and-reel packaging quantity and exact pinout configuration. Ensure the component meets AEC-Q101 automotive qualification requirements if deployed in vehicle environments. Cross-reference the ordering code with the latest onsemi documentation to avoid discrepancies in protection thresholds or package dimensions.

Selection Notes

Select this component for low-side switching applications requiring high current handling up to 15 A. The integrated protections reduce the need for external discrete components. Verify that the load inductance does not exceed the internal clamp capabilities. Confirm compatibility with the system's logic voltage levels, as the device supports both 3.3 V and 5 V input thresholds.

Part Context

This part belongs to the NCV8403 series of intelligent power switches designed for automotive and industrial markets. It serves as a robust alternative to mechanical relays and complex discrete protection circuits. The series is characterized by its ability to handle high surge currents while maintaining a compact footprint suitable for space-constrained printed circuit board layouts.

Replacement Considerations

Direct substitutes may include other N-channel low-side smart switches from onsemi or competitors offering similar 42 V ratings and 15 A current capacity. Verify pin-to-pin compatibility and ensure equivalent protection feature sets before substitution.