In various high-current, high-efficiency application scenarios such as server power supplies, automotive systems, motor drives, and industrial power management, onsemi's NVMFS5C628NT1G, with its advanced trench technology, low on-resistance, and high current capability, has been a key component for engineers worldwide. However, in the post-pandemic era of global supply chain disruptions and trade uncertainties, this imported part faces challenges: extended lead times (often 8-12 weeks), cost volatility due to tariffs and exchange rates, and delayed technical support. These issues hinder production schedules and cost control for downstream companies, making domestic substitution not just an option but a necessity for enhancing supply chain security and competitiveness.
Leveraging years of expertise in power semiconductors, VBsemi introduces the VBQA1603 N-channel MOSFET through independent R&D. This product is precisely aligned as a domestic alternative to the NVMFS5C628NT1G, offering core advantages of parameter optimization, technological parity, and full package compatibility. It enables direct replacement without circuit modifications, delivering a stable, cost-effective, and locally supported solution for high-current electronic systems.
Comprehensive Parameter Optimization, Enhanced Performance for Demanding Conditions.
Tailored to replace the NVMFS5C628NT1G, the VBQA1603 achieves balanced improvements in key electrical parameters, ensuring robust performance in high-current applications:
First, the drain-source voltage is maintained at 60V, matching the original model, which provides reliable operation in standard voltage environments such as automotive and industrial systems, ensuring compatibility without overdesign.
Second, the continuous drain current is rated at 100A, which, while lower than the original 150A, is sufficient for a wide range of high-power applications. This rating offers a cost-effective balance for designs where extreme current handling is not critical, reducing overall system costs while maintaining performance in many scenarios.
Third, the on-state resistance is as low as 3mΩ (@10V gate drive), closely approaching the NVMFS5C628NT1G's 2.3mΩ (@10V, 27A). This low resistance minimizes conduction losses, improving overall efficiency and reducing heat generation—especially beneficial in high-frequency switching applications like DC-DC converters and motor drives.
Additionally, the VBQA1603 supports a ±20V gate-source voltage, offering strong gate ESD protection and noise immunity, preventing false triggering in noisy environments. The 3V gate threshold voltage ensures easy drive compatibility with mainstream driver ICs, eliminating the need for circuit adjustments and simplifying substitution.
Advanced Trench Technology, Reliability and Stability Inherited and Upgraded.
The NVMFS5C628NT1G excels with low on-resistance from trench technology. The VBQA1603 employs similar trench technology, optimizing device reliability and switching characteristics. It undergoes rigorous pre-screening and 100% testing, including avalanche energy tests, to handle transient surges and reduce failure risks. Through optimized capacitance design, it enhances dv/dt tolerance and switching performance, matching the original model's application scenarios. The device operates over a wide temperature range of -55°C to 150°C, suitable for harsh conditions like automotive under-hood or industrial settings. It has passed long-term reliability tests such as high-temperature aging, ensuring a low failure rate for critical applications like servers, power tools, and electric vehicles.
Fully Compatible Package, Enabling "Plug-and-Play" Replacement.
For downstream companies, substitution ease is crucial. The VBQA1603 addresses this with its package design. It uses a DFN8(5X6) package, identical to the NVMFS5C628NT1G in pinout, dimensions, and thermal pad layout. Engineers can replace the component directly on the existing PCB without redesigning layouts or thermal systems, achieving "drop-in" compatibility. This reduces verification time to 1-2 days for samples, avoids costs from PCB revisions, and accelerates time-to-market, helping companies swiftly transition from imported to domestic components.
Local Strength Assurance, Dual Peace of Mind for Supply Chain Security and Technical Support.
Compared to imported parts with unstable supply chains, VBsemi leverages China's mature semiconductor ecosystem, with production bases in Jiangsu and Guangdong ensuring full-process control and stable mass production. The VBQA1603 boasts a standard lead time of under 2 weeks, with expedited options for 72-hour delivery, mitigating risks from logistics, tariffs, or geopolitics. As a local brand, VBsemi provides dedicated technical support: comprehensive documentation (substitution reports, datasheets, thermal guides), application-specific advice, and 24-hour response for troubleshooting. This resolves slow support and high communication costs associated with imports, making substitution smooth and worry-free.
From server and telecom power supplies to automotive motor drives and industrial inverters; from battery management systems to power tools and consumer electronics, the VBQA1603, with its core strengths of "optimized parameters, reliable performance, package compatibility, controlled supply, and responsive service," has become the preferred domestic alternative to the NVMFS5C628NT1G. It is already adopted by leading companies across industries, gaining market recognition. Choosing the VBQA1603 is not just a component swap—it's a strategic move to secure supply chains, reduce costs, and boost competitiveness, offering superior value without R&D risks.