In various medium-voltage, high-frequency application scenarios such as switch-mode power supplies, industrial controls, LED lighting drivers, and motor drives, TOSHIBA's TK5A45DA(STA4,Q,M), with its balanced performance and durable design, has been a trusted choice for engineers globally. However, amid post-pandemic global supply chain disruptions and frequent trade frictions, this imported component reveals growing pain points: unpredictable lead times (often extending months), procurement costs vulnerable to exchange rate swings, and sluggish technical support responses. These issues severely constrain production schedules and cost control for downstream enterprises. Given this industry demand, domestic substitution has evolved from an "option" to a "necessity," becoming a critical path for ensuring supply chain security, reducing costs, and enhancing core competitiveness.
VBsemi, with years of deep expertise in power semiconductors, launches the VBMB155R02 N-channel power MOSFET based on independent R&D. This product is precisely tailored as a domestic alternative to the TK5A45DA(STA4,Q,M), offering core advantages of parameter upgrades, technological parity, and full package compatibility. It can serve as a direct replacement with minimal circuit modifications, delivering a more stable, cost-effective, and locally attuned solution for various medium-voltage electronic systems.
Comprehensive Parameter Enhancements, Robust Performance for Demanding Conditions.
Designed as a domestic alternative to the TK5A45DA(STA4,Q,M), the VBMB155R02 achieves significant, targeted improvements in key electrical parameters, providing stronger guarantees for medium-voltage applications:
First, the drain-source voltage is increased to 550V, 100V higher than the original model's 450V—a 22% improvement. This upgrade offers a wider safety margin in environments with grid fluctuations or transient overvoltages, effectively preventing overvoltage breakdown failures.
Second, the gate-source voltage supports ±30V, delivering superior gate ESD protection and noise immunity, which prevents unintended turn-on in complex electromagnetic environments. The 3V gate threshold voltage ensures easy driving compatibility with mainstream driver ICs, requiring no additional drive circuit adjustments.
While the continuous drain current is rated at 2A, optimized for applications where lower current suffices, the VBMB155R02 excels in scenarios prioritizing higher voltage endurance and reliability. Its on-state resistance is 3000mΩ (@10V gate drive), balanced by advanced planar technology that minimizes switching losses and enhances overall system efficiency in targeted designs.
Enhanced with Advanced Planar Gate Technology, Reliability and Stability Inherited and Upgraded.
The TK5A45DA(STA4,Q,M) relies on proven performance for medium-voltage tasks. The VBMB155R02 employs industry-leading planar gate process technology, building upon this foundation while optimizing device reliability. It undergoes 100% avalanche testing and high-voltage screening, exhibiting excellent single-pulse avalanche energy handling to withstand energy surges during turn-off, reducing avalanche breakdown risks. Through optimized intrinsic capacitance design, it lowers switching charge/discharge losses and elevates dv/dt tolerance, matching the original model's application scenarios. The device operates over an ultra-wide temperature range of -55°C to 150°C, adapting to harsh conditions like industrial high-temperature settings or outdoor extremes. Having passed 1000-hour high-temperature/high-humidity (85°C/85% RH) aging tests and long-term reliability verification, its failure rate is below industry average, ensuring durable operation for critical fields such as industrial controls, power supplies, and lighting systems.
Fully Compatible Package, Enabling "Virtually Cost-Free, Risk-Free, and Immediate" Replacement.
For downstream enterprises, a core concern in domestic substitution is the R&D effort and time cost. The VBMB155R02 addresses this directly through package design. It uses a TO-220F package, fully identical to the TK5A45DA(STA4,Q,M)'s package in pinout, pin spacing, dimensions, and heatsink structure. Engineers need not modify PCB layouts or thermal designs, achieving "plug-and-play" replacement. This high compatibility cuts verification time to 1-2 days, eliminates costs from PCB revisions or mold changes, and preserves original product certifications, accelerating supply chain integration and helping enterprises swiftly adopt domestic alternatives.
Local Strength Assurance, Dual Peace of Mind for Supply Chain Security and Technical Support.
Compared to imported components plagued by international logistics, trade policies, and exchange rate instability, VBsemi leverages China's mature semiconductor industry chain, with modern production bases and R&D centers in Jiangsu and Guangdong, enabling full-process R&D and stable mass production of the VBMB155R02. Lead times are compressed to under 2 weeks, with emergency orders enabling 72-hour rapid delivery, mitigating risks from supply chain volatility, tariffs, or geopolitics. As a local brand, VBsemi provides a professional technical support team offering "one-on-one" customized services: comprehensive documentation including substitution verification reports, datasheets, thermal guides, and application circuits, plus tailored selection advice and circuit optimization. Technical issues receive responses within 24 hours, resolving pains of slow support and high communication costs, ensuring a smooth substitution process.
From industrial switch-mode power supplies and LED drivers to motor controls and medium-voltage inverters, the VBMB155R02, with its core advantages of "higher voltage rating, enhanced reliability, package compatibility, controllable supply, and attentive service," has become the preferred domestic alternative to the TK5A45DA(STA4,Q,M). It has seen adoption in leading companies across industries, earning market recognition. Choosing the VBMB155R02 is not merely a component swap; it is a strategic step for upgrading supply chain security, optimizing production costs, and boosting product competitiveness—requiring no R&D modification risks while gaining stable supply and local technical support.