In various low-voltage, high-current application scenarios such as power management systems, DC-DC converters, motor drives, battery protection circuits, and portable devices, ROHM's RS1E170GNTB, with its advanced trench MOSFET technology, low on-resistance, and high efficiency, 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 several pain points: extended lead times (often 2-4 months), price volatility due to exchange rate fluctuations, and limited technical support responsiveness. These issues hinder downstream companies' production agility and cost optimization. Given this industry demand, domestic substitution has evolved from an "alternative" to a "strategic imperative," becoming a critical path for enterprises to ensure supply chain resilience, reduce dependencies, and enhance competitiveness.
VBsemi, leveraging years of expertise in power semiconductor innovation, introduces the VBGQA1305 N-channel power MOSFET based on its independent R&D capabilities. This product is precisely tailored as a direct alternative to the RS1E170GNTB, offering core advantages of parameter enhancements, technological parity, and full package compatibility. It can serve as a drop-in replacement without any circuit modifications, delivering a more stable, cost-effective, and locally supported high-performance solution for various low-voltage electronic systems.
Comprehensive Parameter Surpassing, Enhanced Performance Margins, Adapting to Demanding Conditions.
Designed as a domestic alternative to the RS1E170GNTB, the VBGQA1305 achieves significant, leapfrog improvements in key electrical parameters, providing robust performance guarantees for high-current applications:
Firstly, the drain-source voltage is maintained at 30V, matching the original model's rating, ensuring compatibility in standard low-voltage environments such as battery-powered systems and automotive electronics.
Secondly, the continuous drain current is increased to 45A, a 12.5% improvement over the original model's 40A. This enhancement allows for higher power handling and improved system reliability, whether in upgraded equipment or designs requiring extra current headroom.
Thirdly, the on-state resistance is dramatically reduced. At a 4.5V gate drive, the VBGQA1305 boasts an RDS(on) of just 7.4mΩ, compared to the RS1E170GNTB's 10.3mΩ—a 28% reduction. Even at 10V gate drive, it achieves an ultra-low 4.4mΩ, significantly lowering conduction losses. This directly translates to higher efficiency, reduced heat generation, and lower cooling requirements, particularly in high-frequency switching applications like DC-DC converters.
Additionally, the VBGQA1305 supports a ±20V gate-source voltage, offering robust gate ESD protection and noise immunity, preventing false triggering in noisy environments. The 1.7V gate threshold voltage balances ease of driving with switching stability, seamlessly matching mainstream driver ICs without circuit adjustments, further simplifying substitution.
Enhanced with Advanced SGT Technology, Reliability and Stability Inherited and Upgraded.
The core strength of the RS1E170GNTB lies in its low on-resistance and fast switching performance. The VBGQA1305 employs state-of-the-art Shielded Gate Transistor (SGT) technology, building upon the original model's benefits while optimizing device reliability. Through optimized cell design and process control, it delivers lower RDS(on) and reduced gate charge, minimizing switching losses and improving overall efficiency. The device undergoes rigorous pre-shipment testing, including 100% avalanche and high-temperature screening, ensuring excellent durability against transient surges and operational stresses. With an extended operating temperature range of -55°C to 150°C, it adapts to harsh conditions such as industrial automation or outdoor environments. Having passed long-term reliability tests like high-temperature/high-humidity aging, its failure rate is significantly below industry averages, providing solid assurance for continuous operation in critical applications like automotive systems, industrial controls, and energy storage.
Fully Compatible Package, Enabling "Virtually Cost-Free, Risk-Free, and Immediate" Replacement.
For downstream enterprises, a key concern in domestic substitution is the engineering effort and time investment. The VBGQA1305 addresses this through its package design. The device uses a DFN8(5X6) package, which is fully compatible with the RS1E170GNTB in pinout, pin spacing, dimensions, and thermal pad layout. Engineers can directly replace the component without modifying PCB layouts or thermal management systems, achieving true "plug-and-play" convenience. This high compatibility slashes substitution verification time—sample validation typically completes within 1-2 days—and eliminates costs associated with PCB redesigns or mold changes. It also preserves original product certifications and外观 designs, accelerating time-to-market and enabling rapid adoption of domestic components.
Local Strength Assurance, Dual Peace of Mind for Supply Chain Security and Technical Support.
Compared to imported components hampered by international logistics, trade policies, and currency risks, VBsemi leverages China's robust semiconductor ecosystem, with modern production bases and R&D centers in Jiangsu, Guangdong, and beyond. This enables full-control R&D and stable mass production of the VBGQA1305. Current standard lead times are compressed to under 2 weeks, with emergency orders supporting 72-hour rapid delivery, mitigating risks from supply chain disruptions, tariffs, or geopolitics. As a local brand, VBsemi provides dedicated technical support with "one-on-one" services: comprehensive documentation including substitution验证 reports, datasheets, thermal guides, and application circuits, plus tailored selection advice and circuit optimization based on customer needs. For any substitution issues, the technical team offers 24-hour rapid response, assisting via on-site or remote solutions. This彻底resolves the slow support and high communication costs of imported components, making substitution seamless and worry-free.
From power management modules and DC-DC converters to motor drives and battery protection; from portable devices and automotive electronics to industrial equipment and renewable energy systems, the VBGQA1305, with its core advantages of "superior parameters, enhanced performance, package compatibility, controllable supply, and attentive service," has become the preferred domestic alternative to the RS1E170GNTB. It has already seen adoption in multiple industry-leading companies, earning high market recognition. Choosing the VBGQA1305 is not just a component swap; it is a strategic move for enterprises to upgrade supply chain security, optimize costs, and boost product competitiveness—requiring no R&D overhaul while gaining better performance, stable supply, and responsive support.