Introduction
MOSFETs serve as essential "switches" for signal control and power management in modern electronics. For years, international brands like ROHM have led the market with reliable components such as the EM6K34T2CR. However, supply chain uncertainties and the push for technological independence have made finding high-performance domestic alternatives a strategic priority. Represented by VBsemi's VBTA3615M, domestic components are now achieving direct competition and even surpassing international benchmarks.
Part 1: Analysis of the Classic Component
ROHM's EM6K34T2CR is a dual N-channel MOSFET with a drain-source voltage of 50V, a continuous drain current of 200mA, and an on-resistance of 1.6Ω at 4.5V gate drive. It features high-speed switching, an ultra-low voltage drive capability (0.9V), and a compact EMT6 package. This makes it ideal for switching applications in portable devices, low-power circuits, and space-constrained designs, where efficiency and miniaturization are critical.
Part 2: Performance Surpassing by the Domestic Challenger
VBsemi's VBTA3615M directly competes with the EM6K34T2CR and offers enhancements in key areas:
Higher Voltage and Current Ratings: Drain-source voltage increases to 60V (up by 10V), and continuous drain current reaches 0.3A (up by 100mA), providing greater design margin and power handling.
Lower Conduction Loss: On-resistance at 10V gate drive is 1.2Ω (compared to 1.6Ω at 4.5V for the EM6K34T2CR), reducing energy loss and improving system efficiency.
Advanced Drive Compatibility: With a threshold voltage (Vth) of 1.7V and VGS tolerance of ±20V, it supports robust low-voltage operation while ensuring reliability.
Package and Pin Compatibility: The SC75-6 package with dual N+N configuration allows for easy drop-in replacement without PCB redesign, based on mature Trench technology for stable performance.
Part 3: Core Value Beyond Specifications
Choosing this domestic alternative delivers deeper benefits:
Supply Chain Resilience: Reduces reliance on global suppliers, ensuring stable availability and production continuity.
Cost Optimization: Offers competitive pricing with superior performance, potentially lowering overall system costs through simplified peripheral designs.
Localized Support: Domestic providers like VBsemi enable faster technical assistance and customized solutions for specific application needs.
Industry Ecosystem Growth: Each successful adoption strengthens the domestic semiconductor sector, fostering innovation and a virtuous development cycle.
Part 4: A Robust Path for Substitution Implementation
To ensure a smooth transition, follow these steps:
Detailed Parameter Comparison: Review all electrical specs, including VDS, ID, RDS(on), and switching characteristics.
Comprehensive Lab Testing: Perform static and dynamic tests, temperature rise evaluations, and reliability assessments under real conditions.
Pilot Batch Validation: Test the VBTA3615M in actual products, monitoring long-term performance and compatibility.
Switchover and Backup Planning: Gradually implement the substitution after verification, while keeping the original design as a short-term backup option.
Conclusion: Moving from "Usable" to "Excellent"
The shift from ROHM's EM6K34T2CR to VBsemi's VBTA3615M illustrates that domestic MOSFETs can not only match but exceed international classics in key aspects. Adopting such high-performance domestic components is a practical response to supply chain challenges and a strategic step toward building an autonomous, resilient, and innovative industrial future. Now is the time to actively evaluate and integrate these advanced domestic solutions.