In various low-voltage, high-efficiency application scenarios such as switch-mode power supplies, battery management systems, portable devices, motor drives, and LED lighting, ROHM's RTQ035N03HZGTR, with its low on-resistance and compact SOT23-6 package, has been a popular choice for engineers worldwide during design selection. However, in the post-pandemic era marked by global supply chain disruptions and trade uncertainties, this imported component has gradually exposed pain points: extended lead times (often 2-4 months), procurement costs affected by currency fluctuations, and slow technical support responses. These issues hinder downstream companies' production efficiency and cost control. Given this industry demand, domestic substitution has evolved from an "option" to a "necessity," becoming a critical path for enterprises to ensure supply chain security, reduce costs, and enhance competitiveness.
VBsemi, leveraging years of expertise in power semiconductors, has launched the VB7322 N-channel MOSFET based on independent R&D. This product precisely targets the RTQ035N03HZGTR, offering core advantages of parameter upgrades, technological parity, and full package compatibility. It serves as a direct replacement without circuit modifications, providing a more stable, cost-effective, and locally attuned solution for low-voltage electronic systems.
Comprehensive Parameter Surpassing, Enhanced Performance for Demanding Conditions.
Tailored as a domestic alternative to the RTQ035N03HZGTR, the VB7322 achieves significant improvements in key electrical parameters, delivering robust performance for low-voltage applications:
Firstly, the continuous drain current is increased to 6A, substantially surpassing the original model's 3.5A—a 71% enhancement in current-carrying capability. This enables seamless adaptation to higher-power circuit designs, improving system stability and supporting upgrades to more demanding applications.
Secondly, the on-state resistance is as low as 26mΩ (@10V gate drive), compared to the RTQ035N03HZGTR's 54mΩ (@4.5V, 3.5A). This reduction minimizes conduction losses, boosting overall efficiency and reducing heat generation in high-frequency switching scenarios, thereby easing thermal design constraints.
Additionally, the VB7322 supports a ±20V gate-source voltage, offering improved gate ESD and noise immunity, preventing unintended turn-on in noisy environments. The 1.7V gate threshold voltage ensures compatibility with mainstream driver ICs, requiring no drive circuit adjustments and lowering substitution barriers.
Enhanced with Advanced Trench Technology, Reliability and Stability Upgraded.
The RTQ035N03HZGTR relies on low on-resistance for efficiency. The VB7322 employs advanced Trench technology, optimizing device reliability and switching performance. It undergoes rigorous testing, including high-temperature and high-humidity aging, ensuring excellent durability under harsh conditions. With an operating temperature range of -55°C to 150°C, it adapts to diverse environments such as industrial settings and outdoor use. Its low failure rate and long-term reliability make it ideal for critical applications like consumer electronics, automotive systems, and power tools.
Fully Compatible Package, Enabling "Plug-and-Play" Replacement.
For downstream enterprises, replacement ease is crucial. The VB7322 addresses this through its package design. The device uses an SOT23-6 package, identical to the RTQ035N03HZGTR in pinout, dimensions, and layout. Engineers can directly replace it without modifying PCB designs or thermal systems, achieving "plug-and-play" convenience. This compatibility reduces verification time to 1-2 days, avoids costs from redesigns, and ensures seamless integration into existing production lines, accelerating time-to-market.
Local Strength Assurance, Dual Peace of Mind for Supply Chain and Support.
Compared to volatile imported supply chains, VBsemi leverages China's robust semiconductor ecosystem, with production bases in Jiangsu and Guangdong, enabling stable mass production of the VB7322. Lead times are compressed to under 2 weeks, with expedited orders for 72-hour delivery, mitigating risks from international logistics, tariffs, and geopolitics. As a local brand, VBsemi provides dedicated technical support: comprehensive documentation, substitution reports, datasheets, and application guides. The technical team offers 24-hour response for any issues, resolving pain points of slow support and high communication costs with imported components.
From battery-powered devices and DC-DC converters to motor controls and LED drivers, the VB7322, with its core advantages of "superior parameters, enhanced reliability, package compatibility, controllable supply, and responsive service," has become the preferred domestic alternative to the RTQ035N03HZGTR. It has gained traction in multiple industries, receiving market acclaim. Choosing the VB7322 is not just a component swap; it's a strategic move for upgrading supply chain security, optimizing costs, and boosting product competitiveness—without R&D risks, while enjoying better performance, stable supply, and seamless support.