Introduction
Power MOSFETs serve as the critical switches managing energy flow in power electronics. For years, international leaders like Toshiba have set industry benchmarks with components such as the TK28A65W,S5X. However, evolving global supply dynamics and the pursuit of technological self-reliance have made finding dependable, high-performance domestic alternatives a strategic imperative. Represented by VBsemi's VBMB165R26S, domestic power semiconductors are now achieving direct competition and performance surpassing of established international classics.
Part 1: Analysis of the Classic Component
Toshiba's TK28A65W,S5X is an N-channel power MOSFET rated for 650V and a continuous drain current of 27.6A. It features a low on-resistance of 110mΩ (typical at Vgs=10V), making it a robust choice for high-efficiency, medium-to-high power applications such as switching power supplies, motor drives, and industrial controls. Its performance and reliability have made it a preferred component in numerous designs.
Part 2: Performance Surpassing by the Domestic Challenger
VBsemi's VBMB165R26S directly competes with the TK28A65W,S5X, offering comparable and enhanced key specifications:
Robust Voltage and Current Rating: It maintains the same high drain-source voltage of 650V while offering a substantial continuous drain current of 26A, ensuring reliable operation in demanding circuits.
Optimized Conduction Performance: The typical on-resistance (RDS(on)) is 115mΩ at 10V, closely matching the classic part, which minimizes conduction losses and supports high system efficiency.
Full Compatibility: The component utilizes a pin-compatible, fully insulated TO-220F package, enabling a drop-in replacement without requiring PCB layout changes.
Advanced Technology: It is built on a mature and stable SJ_Multi-EPI (Super Junction Multi-Epitaxial) process, ensuring high performance and durability.
Part 3: Core Value Beyond Specifications
Selecting this domestic alternative delivers significant strategic advantages:
Enhanced Supply Chain Security: Reduces reliance on single-source international suppliers, mitigating supply risks and ensuring production stability.
Cost Structure Optimization: Often provides a more competitive total cost while delivering equivalent or superior performance, potentially allowing for savings in system design.
Access to Responsive Local Support: Domestic suppliers can offer faster technical support, customization, and collaborative problem-solving tailored to specific application needs.
Strengthening the Industrial Ecosystem: Each successful adoption contributes to the domestic semiconductor industry's technical积累and iterative innovation, fostering a virtuous cycle of development.
Part 4: A Robust Path for Substitution Implementation
To ensure a smooth and successful transition, the following steps are recommended:
Comprehensive Parameter Comparison: Meticulously compare all electrical parameters, including threshold voltage (Vth=3.5V), gate-source voltage range (±30V), and characteristic curves.
Rigorous Laboratory Validation: Perform static parameter verification, dynamic switching tests, thermal performance/efficiency assessments, and necessary reliability stress tests.
Pilot Batch Verification: Implement the component in actual products for field testing under real-world operating conditions, monitoring long-term stability and performance.
Develop a Phased Switchover Plan: After successful verification, plan a gradual rollout while maintaining the original component as a short-term backup option.
Conclusion: Moving from "Alternative" to "Advantage"
The progression from Toshiba's TK28A65W,S5X to VBsemi's VBMB165R26S illustrates that domestic power semiconductors have reached a level where they can not only match but viably substitute for renowned international counterparts. Adopting such high-performance domestic components is a practical solution to current supply chain concerns and a strategic investment in building a more autonomous, resilient, and innovative technological foundation for the future. The time is right to actively evaluate and integrate these capable domestic solutions.