In medium-voltage power conversion and control applications such as DC-DC converters, motor drives, battery management systems, and power distribution switches, NXP's BUK7535-55A,127, with its balanced performance in voltage rating, current handling, and low on-resistance, has been a common choice for designers. However, in the current climate of global semiconductor supply chain volatility and extended lead times, reliance on such imported components introduces risks related to procurement stability, cost predictability, and accessible technical support. This reality makes domestic substitution not just an alternative, but a strategic imperative for ensuring production continuity and cost optimization.
Leveraging its strong in-house R&D and manufacturing capabilities in power semiconductors, VBsemi introduces the VBM1638 N-channel MOSFET. This product serves as a direct, pin-to-pin compatible substitute for the BUK7535-55A,127, offering key advantages of enhanced parameters, technological robustness, and seamless replacement. It provides a more reliable, cost-effective, and locally supported solution for various medium-voltage electronic systems.
Comprehensive Parameter Enhancement, Delivering Higher Power Density and Efficiency.
Designed as a high-performance domestic replacement for the BUK7535-55A,127, the VBM1638 achieves significant improvements across critical electrical specifications, enabling more demanding applications:
The drain-source voltage is raised to 60V, providing a greater safety margin over the original 55V rating, which enhances resilience against voltage spikes and transients in automotive or industrial environments.
The continuous drain current is substantially increased to 50A, a major 43% improvement over the original 35A. This allows for handling higher power levels or improving thermal and reliability margins in existing designs.
The on-state resistance is dramatically reduced to only 24mΩ (at 10V VGS), surpassing the original 35mΩ. This lower RDS(on) minimizes conduction losses, directly boosting system efficiency, reducing heat generation, and simplifying thermal management.
The device features a standard gate threshold voltage (Vth) of 1.7V and supports a gate-source voltage (VGS) of ±20V, ensuring strong noise immunity and compatibility with common driver ICs, facilitating easy circuit integration.
Built on Advanced Trench Technology, Ensuring Robustness and Reliability.
The VBM1638 utilizes advanced Trench MOSFET technology, which is engineered to deliver low on-resistance and excellent switching performance. This technology provides a robust foundation for the device's enhanced current capability and efficiency. Furthermore, the VBM1638 is designed and tested for high reliability, capable of operating over a wide temperature range and suited for rigorous application environments. Its optimized internal structure ensures stable operation under high-frequency switching conditions, making it a dependable upgrade path from the BUK7535-55A,127.
Full Package and Pin Compatibility, Enabling Immediate, Risk-Free Replacement.
A primary concern in component substitution is the engineering effort required for redesign and validation. The VBM1638 eliminates this hurdle through complete package compatibility. It is offered in the industry-standard TO-220 package, which is mechanically and electrically identical to the package used by the BUK7535-55A,127 in terms of pinout, footprint, and mounting. This allows for a true "drop-in" replacement without any modifications to the existing PCB layout, heatsink, or assembly process. The benefits are immediate: it drastically reduces qualification time and cost, avoids production line retooling, and enables a swift transition to a domestic supply source.
Local Supply Chain Assurance and Responsive Technical Support.
Unlike imported components susceptible to geopolitical, logistical, and exchange rate uncertainties, VBsemi's VBM1638 is supported by a localized and secure supply chain. With modern manufacturing facilities in China, VBsemi guarantees stable production volume and significantly shorter lead times compared to overseas suppliers. This translates to better supply security and planning flexibility for customers. Complementing this, VBsemi provides dedicated, local technical support. Engineers have direct access to comprehensive documentation, application notes, and a responsive team that can quickly address design-in questions or substitution challenges, overcoming the slow support cycles often associated with international brands.
From automotive systems and industrial motor controls to high-current DC-DC converters and power switches, the VBM1638, with its core strengths of "higher performance, perfect compatibility, secure supply, and local support," stands as the premier domestic alternative to the NXP BUK7535-55A,127. Choosing the VBM1638 is more than a component swap; it is a strategic step toward greater supply chain resilience, improved product performance, and reduced total cost of ownership—all achieved without incurring redesign risks or compromises.