In widespread high-voltage switching applications such as switch-mode power supplies (SMPS), active power factor correction (PFC), and electronic lamp ballasts, onsemi's FQU5N60CTU has been a preferred choice for engineers, thanks to its proprietary planar stripe and DMOS technology, which delivers low on-resistance, excellent switching performance, and high avalanche energy capability. However, in the current climate of global supply chain uncertainty and extended procurement cycles for imported components, users often face challenges such as volatile pricing, long lead times, and limited technical support. This situation drives the urgent need for a reliable, high-performance domestic alternative that ensures supply chain security and cost control without compromising on quality or performance.
Responding to this market demand, VBsemi introduces the VBFB16R02S, an N-channel power MOSFET developed through independent R&D. This product serves as a direct and fully compatible replacement for the FQU5N60CTU, offering parameter equivalence, package compatibility, and enhanced performance stability. It enables seamless substitution without circuit modifications, providing a more secure, cost-effective, and locally supported solution for high-voltage power designs.
Superior Electrical Parameters and Enhanced Performance Margins
Tailored as a drop-in replacement for the FQU5N60CTU, the VBFB16R02S delivers optimized key electrical characteristics, ensuring robust operation in demanding environments:
- Drain-Source Voltage (Vdss): Maintains 600V, matching the original rating, providing reliable operation in standard high-voltage applications such as SMPS and PFC circuits.
- Continuous Drain Current (Id): Rated at 2A, offering sufficient current capability for typical applications while ensuring stable performance within standard design margins.
- On-State Resistance (RDS(on)): As low as 2300 mΩ (@10V gate drive), lower than the original 2.5Ω, resulting in reduced conduction losses, improved efficiency, and lower heat generation.
- Gate-Source Voltage (VGS): Supports ±30V, enhancing gate robustness and noise immunity in electrically noisy environments.
- Gate Threshold Voltage (Vth): Optimized at 3.3V, ensuring reliable switching and compatibility with common driver ICs, eliminating the need for drive circuit adjustments.
Advanced SJ_Multi-EPI Technology for High Reliability
While the FQU5N60CTU utilizes planar stripe and DMOS technology for low RDS(on) and high avalanche energy, the VBFB16R02S employs VBsemi's advanced SJ_Multi-EPI (Super Junction Multi-Epitaxial) technology. This innovative approach further reduces switching losses, enhances dv/dt tolerance, and improves overall thermal performance. The device undergoes rigorous avalanche energy and high-voltage screening during production, ensuring consistent reliability under surge conditions. With an operating temperature range of -55°C to 150°C and validation through extended high-temperature/high-humidity reliability tests, the VBFB16R02S is suited for long-term use in industrial, lighting, and power supply applications.
Full Package Compatibility for Drop-In Replacement
The VBFB16R02S is offered in a TO-251 package, which is fully compatible with the FQU5N60CTU's package in terms of pinout, dimensions, and mounting footprint. This allows for direct PCB replacement without layout changes, thermal redesign, or mechanical adjustments. The seamless compatibility significantly reduces substitution time and cost—validation can typically be completed within days, and production can proceed without retooling or requalification efforts.
Local Supply Chain and Responsive Technical Support
Unlike imported components subject to logistics delays and geopolitical uncertainties, VBsemi's domestic manufacturing base ensures stable and timely supply for the VBFB16R02S. Standard lead times are shortened, and expedited support is available for urgent needs. Additionally, VBsemi provides dedicated local technical assistance, including substitution guides, application notes, and circuit optimization support, with rapid response to customer inquiries—addressing the common pain points of slow support and high communication barriers associated with international suppliers.
From switch-mode power supplies and PFC circuits to LED drivers and industrial controls, the VBFB16R02S stands out as a superior domestic alternative to the FQU5N60CTU. With its balanced parameters, advanced technology, package compatibility, and reliable local support, it offers engineers and manufacturers a low-risk, high-value solution for securing their supply chains and enhancing product competitiveness—all without compromising performance or requiring design changes.