In the pursuit of supply chain resilience and enhanced performance, engineers globally are seeking reliable alternatives to established power MOSFETs. For those evaluating Infineon's BSZ070N08LS5—an optimized MOSFET for high-frequency switching—consider the advanced Chinese-designed solution: VBsemi's VBGQF1806.
This is not just a pin-to-pin substitute. The VBGQF1806 delivers superior electrical characteristics while providing the stability and cost benefits of a modern, diversified supply source.
Beyond Direct Replacement: A Technical Enhancement
While the BSZ070N08LS5 is a proven performer with its 80V, 40A rating and low 7mΩ RDS(on) at 10V, the VBGQF1806 builds upon this foundation for greater efficiency and robustness. Featuring the same 80V drain-source voltage and a compact DFN8(3x3) package, it offers critical improvements:
Higher Current Capability: The continuous drain current is elevated to 56A, providing significantly more headroom compared to the original 40A rating. This ensures greater design margin for handling peak loads and stressful operating conditions.
Optimized Switching Performance: With an RDS(on) of just 7.5mΩ at 10V gate drive, it maintains extremely low conduction loss. Combined with its SGT (Shielded Gate Trench) technology, the VBGQF1806 achieves an excellent figure-of-merit (FOM), enabling higher frequency operation with reduced switching losses.
Enhanced Gate Drive Flexibility: Its logic-level threshold (3V) and support for gate drive voltages up to ±20V offer wider compatibility and control precision in modern PWM controllers.
Application Advantages: Where It Excels
The technical specs of the VBGQF1806 translate into direct benefits in its core applications:
High-Frequency DC/DC Converters: The low RDS(on) and superior FOM minimize both conduction and switching losses, boosting efficiency in buck, boost, and synchronous rectifier stages. This helps meet stringent energy standards like 80 PLUS.
Synchronous Rectification: Its fast switching characteristics and low on-resistance make it ideal for secondary-side rectification in SMPS, improving overall power density and thermal performance.
Motor Drives & Power Tools: The high 56A current rating and robust construction support demanding start-up and stall conditions, enhancing reliability in brushed and brushless motor drives.
The Strategic Value: Performance Meets Supply Chain Security
Choosing the VBGQF1806 optimizes both your design and supply chain strategy.
Guaranteed Performance: The datasheet confirms it meets or exceeds key parameters of the BSZ070N08LS5, ensuring a smooth, low-risk design transition.
Supply Chain Diversification: Sourcing from VBsemi, a leading Chinese manufacturer, reduces dependency on single-source suppliers and mitigates risks from geopolitical shifts or allocation shortages.
Cost Efficiency: Competitive pricing helps lower the overall BOM cost without compromising quality or performance, strengthening your product's market position.
Conclusion: A Smarter Choice for Next-Generation Designs
VBsemi’s VBGQF1806 is more than an alternative—it’s a strategic upgrade. It delivers the proven performance needed to confidently replace the BSZ070N08LS5, adds measurable improvements in current handling and switching efficiency, and comes with the advantages of a resilient, diversified supply chain.
For your high-frequency DC/DC converters, motor drives, or compact power systems, evaluating the VBGQF1806 isn’t just about finding a replacement—it’s about adopting a smarter, more efficient, and future-ready solution.