In high-voltage, medium-power applications such as switch-mode power supplies (SMPS), industrial inverters, motor drives, LED lighting, and power conversion systems, ROHM's R6504ENJTL N-channel MOSFET has been a reliable component known for its balance of voltage rating and current handling. However, in the current climate of global supply chain uncertainties, extended lead times, and cost volatility associated with imported semiconductors, engineers and procurement managers face significant challenges in securing stable, cost-effective supplies. This pressing need has elevated domestic substitution from a contingency plan to a strategic imperative for ensuring project timelines, cost control, and supply chain resilience.
Addressing this critical industry demand, VBsemi introduces the VBL165R04, a high-performance N-channel power MOSFET developed through independent research and advanced planar technology. Designed as a direct, pin-to-pin alternative to the ROHM R6504ENJTL, the VBL165R04 delivers full electrical compatibility, enhanced reliability, and the significant advantages of local supply chain security, providing a superior and seamless replacement solution for your high-voltage designs.
Precise Parameter Matching with Enhanced Operational Robustness
The VBL165R04 is engineered to match and reliably perform in all key specifications required to replace the R6504ENJTL, while introducing features that offer greater design margin and stability:
- It features the same 650V drain-source voltage (Vdss), providing robust protection against line transients and overvoltage conditions in applications like offline power supplies and motor drives.
- With a continuous drain current (Id) rating of 4A, it matches the current-carrying capability of the original part, ensuring seamless performance in existing circuit layouts.
- The device supports a gate-source voltage (Vgs) of ±30V, offering superior tolerance against gate noise and voltage spikes, which enhances system reliability in electrically noisy environments.
- A standard gate threshold voltage (Vth) of 3.5V ensures easy drive compatibility with common PWM controllers and driver ICs, requiring no circuit modifications.
Advanced Planar Technology for Superior Reliability and Switching Performance
While the R6504ENJTL relies on its established process for performance, the VBL165R04 leverages VBsemi's advanced planar gate technology to achieve excellent reliability and consistent switching characteristics. The device is designed for low gate charge and optimized internal capacitances, which contributes to reduced switching losses and improved efficiency in high-frequency operation. It undergoes rigorous 100% avalanche energy testing and high-voltage screening during production, ensuring it can withstand unclamped inductive switching (UIS) events commonly encountered in inductive load applications. With an extended operational junction temperature range of -55°C to 150°C and validated through stringent reliability tests (including long-term HTRB and H3TRB), the VBL165R04 offers exceptional long-term stability for demanding industrial and automotive environments.
Full Package and Footprint Compatibility for Zero-Risk Replacement
A primary concern in component substitution is the engineering effort and cost associated with redesign. The VBL165R04 eliminates this hurdle entirely through its mechanical design. It is offered in the industry-standard TO-263 (D²Pak) package, which is physically and dimensionally identical to the R6504ENJTL's package. The pin configuration, footprint, and mounting hole positions are perfectly matched, enabling a true "drop-in" replacement. Engineers can substitute the component on existing PCB layouts without any changes to the board, heatsink, or assembly process. This compatibility drastically reduces qualification time, accelerates time-to-market, and eliminates costs related to re-tooling or re-certification.
Guaranteed Supply Stability and Responsive Local Technical Support
Unlike imported alternatives subject to unpredictable logistics, geopolitical factors, and lengthy lead times, the VBL165R04 benefits from VBsemi's fully localized manufacturing and supply chain within China. This ensures stable production capacity and dramatically shorter, more reliable delivery cycles—typically within 2-3 weeks, with expedited options available. This control over the supply chain provides OEMs with crucial planning stability and cost predictability.
Furthermore, VBsemi backs the VBL165R04 with dedicated, local technical support. Engineers have direct access to comprehensive documentation—including detailed datasheets, application notes, and substitution guides—as well as prompt, in-depth assistance for design integration, thermal management, and any application-specific challenges. This responsive support model resolves the common pain points of slow feedback and communication barriers often experienced with overseas suppliers.
Ideal for Diverse High-Voltage Applications
The VBL165R04 is an excellent fit for a broad spectrum of applications where the R6504ENJTL is commonly used, including:
- AC-DC switch-mode power supplies (SMPS) for industrial and consumer electronics
- Power factor correction (PFC) stages
- Motor drive and control circuits
- Inverters for renewable energy systems
- LED lighting drivers and ballasts
- General-purpose power switching and conversion
By choosing the VBL165R04, designers and companies are not merely swapping a component; they are strategically adopting a solution that delivers electrical parity, enhanced supply chain security, cost efficiency, and accessible technical partnership. It represents a smart, forward-looking alternative that safeguards production continuity and boosts product competitiveness without compromising performance or requiring design risks.