Introduction
Power MOSFETs are the critical "switches" controlling energy flow in modern electronic devices. For a long time, international brands like ROHM have dominated the market with their classic products, such as the RS1E150GNTB. However, global supply chain volatility and the need for technological autonomy have made seeking reliable, high-performance domestic alternatives a strategic necessity. Represented by VBsemi's VBQA1308, domestic components are now achieving direct对标 and even surpassing international classics.
Part 1: Analysis of the Classic Component
ROHM's RS1E150GNTB is a low-voltage MOSFET (30V, 15A) utilizing trench technology. It features a low on-resistance (8.8mΩ at 10V, 15A) and is widely used in applications like power management, motor drives, and battery protection circuits, serving as a standard choice for many designs.
Part 2: Performance Surpassing by the Domestic Challenger
VBsemi's VBQA1308 directly对标s the RS1E150GNTB and offers improvements in key parameters:
Higher Current Capability: Continuous drain current reaches 80A (a significant increase from 15A), enabling superior power handling.
Lower Conduction Loss: Typical on-resistance at 10V is 7mΩ (compared to 8.8mΩ), reducing conduction losses and improving system efficiency.
Full Compatibility: Uses a DFN8(5X6) package, ensuring direct replacement without PCB modifications.
Advanced Technology: Based on trench process, ensuring stable and reliable performance.
Part 3: Core Value Beyond Specifications
Choosing a domestic alternative brings deeper advantages:
Ensuring Supply Chain Security: Reduces dependence on a single international supply chain, ensuring supply stability and production continuity.
Optimizing Overall Cost: Typically offers better cost competitiveness with equivalent or superior performance, potentially enabling optimization of peripheral designs.
Accessing Rapid Local Support: Domestic suppliers can provide more agile technical support and joint development tailored to actual application scenarios.
Boosting the Industrial Ecosystem: Every successful application helps the domestic semiconductor industry accumulate experience and iterate technology, forming a virtuous development cycle.
Part 4: A Robust Path for Substitution Implementation
For a smooth transition, the following steps are recommended:
Detailed Specification Comparison: Carefully compare all key electrical parameters and characteristic curves.
Rigorous Laboratory Testing: Conduct static parameter tests, dynamic switching tests, temperature rise/efficiency tests, and reliability stress tests.
Small-Batch Pilot Verification: Trial the component in real products and environments, tracking long-term performance.
Develop a Switchover and Backup Plan: Implement the substitution gradually after verification is complete, while retaining the original design as a short-term backup.
Conclusion: Moving from "Usable" to "Excellent"
The evolution from the RS1E150GNTB to the VBQA1308 demonstrates that domestic power semiconductors now possess the capability to compete with and even surpass international classics in certain aspects. Adopting such high-performance domestic components is not only a pragmatic choice to address current supply chain challenges but also a strategic move to build an autonomous, resilient, and innovative industrial ecosystem for the future. Now is the opportune time to actively evaluate and introduce high-quality domestic solutions.