NCV8403ASTT1G

Overview

The NCV8403ASTT1G is a low-side self-protected power switch IC from onsemi, designed for automotive and industrial applications. It features an N-channel MOSFET with a maximum continuous output current of 15 A and a typical on-resistance of 53 mOhms. The device operates within a supply voltage range up to 40 V and supports a junction temperature range from -40°C to +150°C. Key electrical parameters include a maximum turn-on time of 44 µs and a maximum idle time of 116 µs. It is housed in a SOT-223-3 surface-mount package and holds AEC-Q100 qualification.

Feature Summary

• Integrates fixed current limiting, overtemperature protection, and overvoltage protection with automatic restart functionality.
• Features a non-inverting input interface for direct control compatibility.
• Provides robust thermal management capabilities suitable for high-power distribution environments.

Applications

• Automotive lighting systems
• Power distribution units in vehicles
• Industrial load switching

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and tape-and-reel specifications. Confirm that the AEC-Q100 qualification status aligns with project requirements. Check for any recent Product Change Notifications (PCN) regarding package or material updates. Ensure the SOT-223-3 footprint matches the design layout. Validate thermal dissipation requirements based on the specified power dissipation limits.

Selection Notes

Select this component when a single-channel low-side switch with integrated fault protection is required. The 15 A current rating and low on-resistance make it suitable for driving moderate-power loads. Consider the 40 V maximum voltage rating for system compatibility. The automatic restart feature simplifies recovery from fault conditions without external reset logic. Evaluate thermal performance within the SOT-223-3 package constraints for the intended application environment.

Part Context

This part belongs to the NCV8403A series of self-protected low-side switches. It is designed as a robust solution for replacing discrete MOSFETs and protection circuits in power distribution networks. The integration of protection features reduces bill-of-materials complexity and board space. It is distinct from high-side variants and multi-channel devices within the broader power switch portfolio.

Replacement Considerations

Direct replacements may include other NCV8403A series variants with different current ratings or packaging options. Verify pinout compatibility and electrical parameter equivalence before substitution. Cross-reference with similar low-side switches from other manufacturers only if functional and thermal characteristics match precisely.