Introduction
Power MOSFETs serve as essential switches in modern electronics, managing energy flow with precision. For years, international brands like ROHM have set industry standards with components such as the RK7002BT116. However, global supply chain disruptions and the push for technological self-reliance have fueled the demand for reliable, high-performance domestic alternatives. Represented by VBsemi's VB162K, domestic components are now achieving direct substitution and even surpassing international classics.
Part 1: Analysis of the Classic Component
ROHM's RK7002BT116 is a low-voltage MOSFET (60V, 250mA) featuring fast switching capabilities, compact SST3 packaging, and low-voltage drive (2.5V). With an on-resistance of 12Ω at 2.5V, it balances efficiency and size, making it ideal for switching applications in portable devices, sensors, and low-power circuits. Its reliability and performance have made it a go-to choice for many designs.
Part 2: Performance Surpassing by the Domestic Challenger
VBsemi's VB162K directly targets the RK7002BT116 and excels in key parameters:
Higher Current Handling: Continuous drain current reaches 0.3A (an increase of 50mA), enabling better load management and extended application scope.
Lower Conduction Loss: On-resistance is 2.8Ω at 10V (significantly lower than 12Ω at 2.5V), reducing power dissipation and improving system efficiency.
Enhanced Drive Flexibility: Gate-source voltage tolerance of ±20V and a threshold voltage of 1.7V support broader drive conditions.
Full Compatibility: Uses a pin-compatible SOT23-3 package, allowing direct replacement without PCB redesign.
The device leverages advanced Trench technology, ensuring stable performance and fast switching.
Part 3: Core Value Beyond Specifications
Opting for a domestic alternative delivers deeper benefits:
Ensuring Supply Chain Security: Reduces reliance on single-source international suppliers, mitigating risks and ensuring production continuity.
Optimizing Overall Cost: Offers competitive pricing with superior performance, potentially lowering system costs and simplifying peripheral designs.
Accessing Rapid Local Support: Domestic suppliers provide agile technical assistance and customized solutions for specific application needs.
Boosting the Industrial Ecosystem: Each successful substitution strengthens the domestic semiconductor industry, fostering innovation and a virtuous cycle of development.
Part 4: A Robust Path for Substitution Implementation
To ensure a smooth transition, follow these steps:
Detailed Specification Comparison: Verify all electrical parameters, including VDS, ID, RDS(on), and switching characteristics.
Rigorous Laboratory Testing: Conduct static and dynamic tests, efficiency evaluations, and reliability stress tests under real-world conditions.
Small-Batch Pilot Verification: Trial the VB162K in actual products, monitoring long-term performance and compatibility.
Develop a Switchover and Backup Plan: Implement substitution gradually after validation, while keeping the original design as a short-term backup.
Conclusion: Moving from "Usable" to "Excellent"
The shift from ROHM's RK7002BT116 to VBsemi's VB162K showcases that domestic MOSFETs now rival and exceed international counterparts 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 future. Now is the time to actively evaluate and integrate quality domestic solutions.