Introduction
Power MOSFETs are the crucial "switches" controlling energy flow in modern electronic devices. For a long time, international brands like Alpha and Omega Semiconductor (AOS) have dominated the market with their classic products, such as the AOTF7N70L. 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 VBMB18R07S, domestic components are now achieving direct对标and even surpassing international classics.
Part 1: Analysis of the Classic Component
AOS's AOTF7N70L is a high-voltage MOSFET (800V, 7A) with an on-resistance of 1.8Ω at 10V. It is widely used in medium- to high-power applications such as switch-mode power supplies, motor drives, and industrial systems, becoming a standard choice for many designs.
Part 2: Performance Surpassing by the Domestic Challenger
VBsemi's VBMB18R07S directly对标s the AOTF7N70L and offers significant improvements in key parameters:
Lower Conduction Loss: Typical on-resistance is 770mΩ (0.77Ω) at 10V, significantly reducing conduction losses and enhancing system efficiency.
Comparable Voltage and Current: Drain-source voltage is 800V, and continuous drain current is 7A, matching the classic component while providing a performance edge.
Advanced Technology: Utilizes SJ_Multi-EPI technology for optimized switching and reliability, with a gate-source voltage (VGS) of ±30V and threshold voltage (Vth) of 3.5V.
Full Compatibility: Features a pin-compatible, fully insulated TO-220F package, allowing direct replacement without PCB modifications.
Part 3: Core Value Beyond Specifications
Choosing a domestic alternative brings deeper advantages:
Ensuring Supply Chain Security: Reduces dependence on international supply chains, ensuring supply stability and production continuity.
Optimizing Overall Cost: Typically offers better cost competitiveness with superior performance, enabling potential optimization of peripheral designs like thermal management.
Accessing Rapid Local Support: Domestic suppliers provide agile technical support and joint development tailored to specific application scenarios.
Boosting the Industrial Ecosystem: Every successful application helps the domestic semiconductor industry accumulate experience and drive technological iteration, 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, while retaining the original design as a short-term backup.
Conclusion: Moving from "Usable" to "Excellent"
The evolution from the AOTF7N70L to the VBMB18R07S demonstrates that domestic power semiconductors now possess the capability to compete with and even surpass international classics in critical 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.