In modern power design, choosing the right MOSFET involves balancing performance, size, cost, and supply chain stability. This analysis uses two representative MOSFETs—AO3481C (P-channel) and AOB190A60L (N-channel)—as benchmarks, comparing them with domestic alternatives VB2355 and VBL16R20S. By examining parameter differences and performance orientations, we provide a clear selection guide for your next design.
Comparative Analysis: AO3481C (P-channel) vs. VB2355
Original Model (AO3481C) Core Analysis:
This is a 30V P-channel MOSFET from AOS in a compact SOT-23-3 package. Its design focuses on efficient power switching in space-constrained applications. Key advantages include a low on-resistance of 45mΩ at 10V drive, a continuous drain current of 4.3A, and low gate charge for fast switching and reduced drive loss.
Compatibility and Differences of Domestic Alternative (VB2355):
VBsemi’s VB2355 is a pin-to-pin compatible alternative in SOT23-3 package. Electrical differences: VB2355 has a similar voltage rating (-30V) and on-resistance (46mΩ@10V), but offers a higher continuous current of -5.6A, providing improved current handling.
Key Application Areas:
- AO3481C: Ideal for low-power, compact designs such as load switches in portable devices, power management in battery-operated systems, and signal switching circuits.
- VB2355: Suitable for applications requiring slightly higher current capacity (up to 5.6A) within the same voltage range, such as enhanced load switches or compact power modules.
Comparative Analysis: AOB190A60L (N-channel) vs. VBL16R20S
Original Model (AOB190A60L) Core Analysis:
This 600V N-channel MOSFET from AOS in a TO-263 (D2Pak) package targets high-voltage, medium-power applications. It features a 190mΩ on-resistance at 10V, a continuous current of 20A, and robust switching capabilities, making it suitable for demanding power circuits.
Compatibility and Differences of Domestic Alternative (VBL16R20S):
VBsemi’s VBL16R20S is a direct alternative in TO263 package with matching key parameters: 600V voltage rating, 190mΩ on-resistance at 10V, and 20A continuous current. It uses SJ_Multi-EPI technology for reliable high-voltage performance.
Key Application Areas:
- AOB190A60L: Optimized for high-voltage applications like AC-DC power supplies, motor drives, and industrial inverters where 600V rating and 20A current are critical.
- VBL16R20S: A fully compatible alternative for the same high-voltage scenarios, offering equivalent performance with supply chain diversification.
Conclusion:
For P-channel needs in compact designs, AO3481C provides a balance of low RDS(on) and current capability, while VB2355 offers a compatible alternative with higher current handling. For high-voltage N-channel applications, AOB190A60L delivers robust 600V/20A performance, with VBL16R20S serving as a reliable domestic substitute. Selection depends on precise requirement matching—domestic alternatives like VB2355 and VBL16R20S not only ensure compatibility but also enhance supply chain resilience, giving engineers flexible options for cost-effective and efficient designs.