In medium-voltage, high-current application domains such as DC-DC converters, motor drives, battery management systems, and power tools, Infineon's IRLZ44ZSTRLPBF has been a widely adopted choice for engineers due to its robust performance. However, in the current climate of global supply chain uncertainties and logistical delays, reliance on imported components like this one presents challenges including extended lead times, cost volatility, and constrained technical support. This landscape has accelerated the shift towards domestic substitution from a strategic consideration to an operational imperative for ensuring supply chain resilience and cost optimization.
Responding to this critical market need, VBsemi introduces the VBL1615 N-channel power MOSFET, developed through independent R&D. This product serves as a direct, pin-to-pin replacement for the IRLZ44ZSTRLPBF, offering key advantages of enhanced electrical parameters, advanced technology, and full package compatibility. It enables a seamless upgrade path for various electronic systems, providing a more reliable, cost-effective, and locally supported solution.
Comprehensive Parameter Advancement, Providing Stronger Performance Margins
Engineered as a high-performance domestic alternative to the IRLZ44ZSTRLPBF, the VBL1615 delivers significant, all-round improvements in core electrical specifications:
First, the drain-source voltage (VDS) is increased to 60V, offering a higher margin over the original 55V rating. This enhancement provides improved robustness against voltage spikes and transients in demanding automotive or industrial environments.
Second, the continuous drain current (ID) is substantially elevated to 75A, a remarkable ~47% increase over the original 51A. This superior current-handling capability effortlessly supports higher power demands, enabling more robust circuit designs and enhancing system reliability.
Third, the on-state resistance is significantly reduced to 11mΩ (@10V VGS), outperforming the IRLZ44ZSTRLPBF's 13.5mΩ. This lower RDS(on) directly translates to reduced conduction losses, higher efficiency, and lower operating temperatures, which simplifies thermal management design.
Furthermore, the VBL1615 features a ±20V gate-source voltage rating, ensuring strong gate oxide protection. Its 1.7V typical threshold voltage (Vth) facilitates easy drive compatibility with common controller ICs, requiring no circuit modifications for replacement.
Built on Advanced Trench Technology, Ensuring High Efficiency and Reliability
The VBL1615 utilizes an advanced Trench process technology. This design optimizes cell density and channel structure, achieving the very low on-resistance critical for high-current applications while maintaining excellent switching characteristics. The device is subjected to rigorous reliability testing, including 100% automated parameter verification. Its optimized internal structure ensures low gate charge and favorable capacitance characteristics, contributing to reduced switching losses and stable operation in high-frequency switching scenarios. With an operational junction temperature range extending up to 175°C, the VBL1615 is engineered to perform reliably under strenuous conditions, making it suitable for demanding applications in automotive, industrial, and consumer electronics.
Fully Compatible Package, Enabling Direct "Drop-In" Replacement
The VBL1615 is offered in a standard TO-263 (D2PAK) package, which is mechanically and electrically identical to the IRLZ44ZSTRLPBF's package. This complete pin-for-pin and footprint compatibility allows engineers to replace the existing component directly on the PCB without any layout changes or thermal redesign. The "plug-and-play" nature of this substitution drastically reduces validation time and engineering overhead, eliminates costs associated with PCB re-spins or mechanical reworks, and accelerates the time-to-market for end products undergoing component localization.
Local Supply Chain Assurance and Responsive Technical Support
Leveraging VBsemi's integrated domestic manufacturing and supply chain, the VBL1615 offers predictable lead times and stable pricing, shielding customers from international logistics disruptions and currency fluctuations. As a local provider, VBsemi backs the VBL1615 with accessible, responsive technical support. Customers receive comprehensive documentation, including detailed substitution guides, application notes, and SPICE models. A dedicated technical team is available to provide prompt, practical assistance for design-in challenges, ensuring a smooth and low-risk transition from the imported component.
From DC-DC power supplies and motor controllers to battery protection circuits and high-current switches, the VBL1615, with its core strengths of "higher current capability, lower losses, perfect compatibility, and secure supply," stands as the ideal domestic substitute for the Infineon IRLZ44ZSTRLPBF. Choosing the VBL1615 is not merely a component swap; it is a strategic step towards securing your supply chain, boosting product performance, and gaining a competitive edge—all without assuming redesign risks.