Introduction
Power MOSFETs serve as critical switches managing energy flow in modern electronics. For years, international brands like ROHM have led the market with established products such as the R6520ENJTL. However, global supply chain disruptions and the push for technological self-reliance have made finding reliable, high-performance domestic alternatives a strategic imperative. Represented by VBsemi's VBL165R20S, domestic components are now achieving direct benchmarking and even outperforming international classics.
Part 1: Analysis of the Classic Component
ROHM's R6520ENJTL is a high-voltage MOSFET (650V, 20A) featuring a robust design with an on-resistance of 205mΩ at 10V and 9.5A. This component is widely used in applications requiring high power handling, such as industrial power supplies, motor drives, and energy systems, thanks to its balance of voltage withstand capability and current capacity, making it a go-to choice for many designs.
Part 2: Performance Surpassing by the Domestic Challenger
VBsemi's VBL165R20S directly benchmarks the R6520ENJTL and delivers enhancements in key parameters:
Lower Conduction Loss: Typical on-resistance is reduced to 160mΩ at 10V (compared to 205mΩ), significantly cutting conduction losses and boosting system efficiency.
Equivalent Voltage and Current: Maintains a drain-source voltage of 650V and a continuous drain current of 20A, ensuring compatibility and reliability in high-power scenarios.
Advanced Technology: Utilizes SJ_Multi-EPI (Super Junction Multi-Epitaxial) technology, optimizing performance for high-speed switching and thermal stability.
Full Compatibility: Comes in a pin-compatible TO-263 package, allowing direct replacement without PCB modifications, and supports a gate-source voltage of ±30V with a threshold voltage of 3.5V for design flexibility.
Part 3: Core Value Beyond Specifications
Opting for a domestic alternative offers deeper advantages:
Ensuring Supply Chain Security: Reduces reliance on single international sources, enhancing supply stability and production continuity.
Optimizing Overall Cost: Provides better cost-effectiveness with superior performance, potentially enabling savings in peripheral components like heat sinks.
Accessing Rapid Local Support: Domestic suppliers offer agile technical support and tailored solutions for specific application needs.
Boosting the Industrial Ecosystem: Each successful adoption helps the domestic semiconductor industry gain experience and drive technological innovation, fostering a virtuous cycle of growth.
Part 4: A Robust Path for Substitution Implementation
To ensure a smooth transition, follow these steps:
Detailed Specification Comparison: Meticulously compare all electrical parameters, including VDS, ID, RDS(on), VGS, and Vth.
Rigorous Laboratory Testing: Conduct static and dynamic tests, temperature rise evaluations, efficiency measurements, and reliability stress tests.
Small-Batch Pilot Verification: Trial the component in real-world products and environments, monitoring long-term performance and stability.
Develop a Switchover and Backup Plan: Gradually implement the substitution after successful verification, while keeping the original design as a short-term backup option.
Conclusion: Moving from "Usable" to "Excellent"
The shift from the R6520ENJTL to the VBL165R20S illustrates that domestic power semiconductors now compete with and surpass international classics in key aspects. Adopting such high-performance domestic components is not only a practical response to supply chain challenges but also a strategic step toward building an autonomous, resilient, and innovative industrial ecosystem for the future. Now is the ideal time to actively evaluate and integrate high-quality domestic solutions like the VBL165R20S.