N-channel power MOSFET parameter comparison and analysis report

1. Product Overview

2SK4087LS: SANYO N-channel silicon MOSFET, 600V withstand voltage, low on-resistance, high reliability (using HVP process), avalanche-tolerance guarantee. Package: TO-220FI (LS). Suitable for general switching applications.

VBMB165R09S: VBsemi N-channel 650V Super Junction Power MOSFET, low FOM (Ron×Qg), ultra-low gate charge, Avalanche Energy certified. Package: TO-220F (fully encapsulated). Suitable for server power supplies, switching power supplies, PFC, lighting, and industrial applications.

2. Comparison of Absolute Maximum Rated Values

Analysis: The VBMB165R09S offers a higher withstand voltage rating (650V vs 600V) and significantly higher avalanche energy (680mJ vs 117mJ), making it more reliable in inductive load applications. However, the 2SK4087LS provides higher continuous and pulse current ratings (14A/52A vs 9A/27A) but with lower power dissipation (40W vs 280W).

3. Comparison of Electrical Characteristic Parameters

3.1 Conduction characteristics

Analysis: The RDS(on) values of the two devices are similar (approximately 0.5~0.6Ω). The VBMB165R09S has a slightly lower threshold voltage range, which may make it easier to drive in a low-gate-voltage drive circuit

3.2 Dynamic characteristics

Analysis: The VBMB165R09S employs super-junction technology, featuring significantly lower Crss (4pF vs 50pF) and Coss (80pF vs 220pF), which generally enables lower switching losses and faster switching speeds. However, the 2SK4087LS has a lower total gate charge (46 nC vs 85 nC), potentially reducing gate-drive power requirements.

3.3 Switching time

Analysis: The VBMB165R09S exhibits significantly faster switching performance, particularly in fall time (12ns vs 48ns) and turn-off delay (80ns vs 144ns). This makes the VBMB165R09S more suitable for high-frequency switching applications, effectively reducing switching losses.

4. Body Diode Reverse Conduction Characteristics

Analysis: The forward voltage drop of the diodes in both devices is similar (approximately 1V). The VBMB165R09S provides detailed reverse recovery parameters (trr=60ns, Qrr=5.8μC), which is crucial for synchronous rectification and motor drive applications.

5. Thermal Characteristics

Analysis: The VBMB165R09S exhibits excellent thermal characteristics, with a junction-to-case thermal resistance of only 0.7°C/W, a key factor enabling it to withstand high power dissipation of up to 280W. With appropriate heat dissipation design, this device is well-suited for high-power applications.

6. Summary and Selection Recommendations

【Model Selection Advice】

▶ Choose 2SK4087LS: When the application requires higher current capability, gate drive power is limited, or the operating frequency is low.

▶ Choose VBMB165R09S: When the application requires higher voltage margin, high-frequency switching, strong avalanche capability, or high-power applications that require efficient thermal management.

Note: This report was automatically generated based on the official datasheets for 2SK4087LS (SANYO) and VBMB165R09S (VBsemi). All parameter values are from the original manufacturer's datasheets; please refer to the official documentation for design selection.