Introduction
Power MOSFETs serve as essential switches for energy control in modern electronics. For years, international brands like ROHM have led the market with established products such as the RTR020N05TL. However, supply chain uncertainties and the push for technological self-reliance have made finding reliable, high-performance domestic alternatives a strategic priority. Represented by VBsemi’s VB1695, domestic components are now achieving direct competition and even surpassing international benchmarks.
Part 1: Analysis of the Classic Component
ROHM’s RTR020N05TL is a low-voltage MOSFET (45V, 2A) featuring low on-resistance (180mΩ @4.5V) and an integrated GS protection diode. Its compact TSMT3 surface-mount package saves space, while lead-free plating ensures RoHS compliance. This device is commonly used in switching applications, offering a balance of performance and miniaturization for low-power designs.
Part 2: Performance Surpassing by the Domestic Challenger
VBsemi’s VB1695 directly targets the RTR020N05TL and demonstrates superior key parameters:
Higher Voltage and Current Ratings: Drain-source voltage reaches 60V (a 15V increase), and continuous drain current reaches 4A (a 2A increase), providing enhanced safety margins and greater power-handling capability.
Lower Conduction Loss: On-resistance is reduced to 75mΩ @10V, significantly lowering conduction losses and improving system efficiency.
Full Compatibility: Uses a pin-compatible SOT23-3 package, allowing direct drop-in replacement without PCB modifications.
The device leverages advanced Trench technology, ensuring robust and reliable performance.
Part 3: Core Value Beyond Specifications
Opting for a domestic alternative delivers deeper advantages:
Ensuring Supply Chain Security: Reduces reliance on international supply chains, ensuring stable availability and production continuity.
Optimizing Overall Cost: Offers better cost-effectiveness with equal or better performance, potentially simplifying peripheral designs like thermal management.
Accessing Rapid Local Support: Domestic suppliers provide agile technical support and tailored solutions for specific application needs.
Boosting the Industrial Ecosystem: Each successful adoption helps the domestic semiconductor industry accumulate experience and drive technological iteration.
Part 4: A Robust Path for Substitution Implementation
To ensure a smooth transition, follow these steps:
Detailed Specification Comparison: Meticulously compare all electrical parameters and characteristic curves.
Rigorous Laboratory Testing: Conduct static parameter tests, dynamic switching tests, temperature rise/efficiency evaluations, and reliability stress tests.
Small-Batch Pilot Verification: Trial the component in real products and environments, monitoring long-term performance.
Develop a Switchover and Backup Plan: Gradually implement the substitution after verification, while keeping the original design as a short-term backup.
Conclusion: Moving from "Usable" to "Excellent"
The progression from the RTR020N05TL to the VB1695 illustrates that domestic power semiconductors now possess the capability to rival and exceed international classics in key areas. 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 quality domestic solutions.