In various low-voltage, high-current application scenarios such as power management systems, motor drives, battery protection circuits, DC-DC converters, and portable devices, ROHM's RSH090N03TB1, with its low on-resistance, high efficiency, and compact design, has long been a preferred choice for engineers worldwide during design selection. However, against the backdrop of global supply chain uncertainties and rising procurement costs in the post-pandemic era, this imported component has gradually exposed pain points: extended lead times, price volatility due to exchange rate fluctuations, and limited technical support responsiveness. These issues challenge downstream companies' production efficiency and cost control. Given this industry demand, domestic substitution has transitioned from an "option" to a "necessity," becoming a critical path for enterprises to ensure supply chain security, reduce dependencies, and enhance competitiveness.
VBsemi, leveraging its expertise in power semiconductors, has launched the VBA1328 N-channel MOSFET based on independent R&D. This product precisely aligns with the RSH090N03TB1, offering core advantages of parameter parity, technological advancement, and full package compatibility. It can serve as a direct drop-in replacement without circuit modifications, providing a stable, cost-effective, and locally supported solution for various low-voltage electronic systems.
Optimized Parameter Matching, Enhanced Performance for Demanding Conditions.
Tailored as a domestic alternative to the RSH090N03TB1, the VBA1328 delivers comparable or improved electrical parameters, ensuring reliable performance in low-voltage applications:
Firstly, the drain-source voltage is maintained at 30V, matching the original model, which guarantees suitability for standard low-voltage circuits such as battery-powered devices and automotive systems.
Secondly, the continuous drain current is rated at 6.8A, slightly below the original model's 9A, but with optimized on-resistance. The on-state resistance is as low as 16mΩ (@10V gate drive), identical to the RSH090N03TB1's 16mΩ. This ensures minimal conduction losses, enhancing overall system efficiency and reducing heat generation in high-current scenarios.
Thirdly, the gate-source voltage support of ±20V offers robust ESD protection and noise immunity, preventing false triggering in noisy environments. The 1.7V gate threshold voltage balances ease of drive and switching stability, compatible with mainstream driver ICs without requiring circuit adjustments.
Additionally, the VBA1328 features a low RDS(on) of 16mΩ at both 4.5V and 10V gate drives, providing flexibility in low-voltage driving applications and improving energy efficiency.
Advanced Trench Technology, Reliability and Efficiency Upgraded.
The core advantage of the RSH090N03TB1 lies in its low on-resistance and fast switching performance. The VBA1328 employs advanced Trench technology, optimizing device reliability and efficiency. Through enhanced process design, it reduces switching losses and improves thermal performance, ensuring stable operation in high-frequency applications. The device undergoes rigorous testing, including high-temperature and high-humidity aging tests, resulting in a failure rate below industry standards. With an operating temperature range of -55°C to 150°C, it adapts to harsh conditions such as industrial environments and outdoor use, making it ideal for reliability-critical fields like automotive electronics, consumer devices, and power tools.
Fully Compatible Package, Enabling Seamless and Immediate Replacement.
For downstream enterprises, a key concern in domestic substitution is the cost and effort of redesign. The VBA1328 addresses this through its package design. The device uses an SOP8 package, which is fully compatible with the RSH090N03TB1 in pinout, dimensions, and footprint. Engineers can directly replace the component on existing PCBs without layout changes or thermal redesign, achieving "plug-and-play" convenience. This compatibility reduces verification time to 1-2 days, eliminates PCB revision costs, and avoids re-certification, accelerating the substitution process and helping enterprises quickly upgrade their supply chains.
Local Strength Assurance, Dual Peace of Mind for Supply Chain and Support.
Compared to imported components affected by logistics delays and trade barriers, VBsemi leverages China's robust semiconductor ecosystem, with production bases in Jiangsu and Guangdong enabling stable mass production of the VBA1328. The standard lead time is within 2 weeks, with expedited options for urgent orders, mitigating risks from global supply chain disruptions. As a local brand, VBsemi provides dedicated technical support, offering comprehensive documentation—including substitution reports, datasheets, and application guides—along with 24-hour responsive assistance for any issues. This eliminates the slow support and high communication costs associated with imported parts, ensuring a smooth and worry-free substitution experience.
From power management and motor drives to battery protection and DC-DC converters; from portable electronics and automotive systems to industrial controls and consumer appliances, the VBA1328, with its core advantages of "parameter parity, enhanced reliability, package compatibility, controllable supply, and attentive service," has become the preferred domestic alternative to the RSH090N03TB1. It has already been adopted by leading companies across industries, gaining market recognition. Choosing the VBA1328 is not just a component replacement; it is a strategic move for enterprises to secure supply chains, optimize costs, and boost competitiveness—requiring no design risks while benefiting from stable performance, reliable supply, and local support.