In power design, selecting the right MOSFET is a critical task that balances performance, cost, and supply chain stability. This article takes two classic MOSFETs—IRFZ20PBF (N-channel) and SUM110P04-05-E3 (P-channel)—as benchmarks, analyzes their design cores and application scenarios, and evaluates two domestic alternative solutions, VBM1680 and VBL2406. By clarifying parameter differences and performance orientations, we aim to provide a clear selection guide for your next power switching design.
Comparative Analysis: IRFZ20PBF (N-channel) vs. VBM1680
Analysis of the Original Model (IRFZ20PBF) Core:
This is a 50V N-channel MOSFET from VISHAY in a TO-220AB package. Its design focuses on reliable medium-power switching with a continuous drain current of 15A and an on-resistance of 100mΩ at 10V. It offers robust performance for general-purpose applications.
Compatibility and Differences of the Domestic Alternative (VBM1680):
VBsemi’s VBM1680 is a pin-to-pin compatible alternative in a TO-220 package. Key differences include a higher voltage rating (60V vs. 50V), a higher continuous current (20A vs. 15A), and a significantly lower on-resistance (72mΩ at 10V vs. 100mΩ). This makes VBM1680 a performance-enhanced replacement.
Key Application Areas:
- Original Model IRFZ20PBF: Suitable for medium-power switching, motor drives, and power supplies in 12V-24V systems where cost and availability are priorities.
- Alternative Model VBM1680: Ideal for applications requiring higher voltage tolerance, lower conduction loss, and increased current capacity, such as upgraded power converters or motor controls.
Comparative Analysis: SUM110P04-05-E3 (P-channel) vs. VBL2406
Analysis of the Original Model (SUM110P04-05-E3) Core:
This is a 40V P-channel MOSFET from VISHAY in a TO-263 (D2PAK) package. It features a low on-resistance of 5mΩ at 10V and a high continuous current of 39A, targeting high-efficiency, high-current applications like power management and motor drives.
Compatibility and Differences of the Domestic Alternative (VBL2406):
VBsemi’s VBL2406 is a direct alternative in a TO-263 package. It matches the voltage rating (-40V) but offers a much higher continuous current (-110A vs. 39A) and lower on-resistance (4.1mΩ at 10V vs. 5mΩ). This represents a substantial performance upgrade.
Key Application Areas:
- Original Model SUM110P04-05-E3: Excellent for high-current P-channel applications such as high-side switches in DC-DC converters, battery management, and motor drives in 12V-24V systems.
- Alternative Model VBL2406: Suited for demanding applications requiring ultra-low conduction loss and very high current handling, such as high-power inverters, advanced motor drives, or server power systems.
Conclusion:
The selection between original and domestic alternatives depends on specific requirements. IRFZ20PBF and SUM110P04-05-E3 remain reliable choices for standard applications. Their domestic counterparts, VBM1680 and VBL2406, offer enhanced parameters—higher current, lower resistance, and better voltage ratings—providing engineers with superior performance options and supply chain flexibility. Understanding each device’s design intent and parameters ensures optimal circuit performance and value.