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18N50 mosfet card

18N50 mosfet card

18N50 MOSFET Power Card

High-Voltage Switching | Robust Performance | Compact Layout

The 18N50 MOSFET Card is a specialized power-stage module designed around 18N50 N-channel MOSFETs, offering reliable high-voltage switching for inverter welders, power converters, and industrial electronics. Optimized for efficient conduction and rapid switching, this card delivers low on-resistance and high current capability in a compact, service-friendly format.

🔧 Key Features:

  • ⚡ 18N50 MOSFETs – Four or more matched 18 A / 500 V N-channel MOSFETs (18N50) in half- or full-bridge topology

  • 🌡️ Low R<sub>DS(on)</sub> – Typically ≤ 0.18 Ω for minimal conduction losses and heat generation

  • 🔄 Fast Switching – Gate charge optimized for switching frequencies up to 50 kHz

  • 🛡️ Integrated Gate Drivers – Onboard driver ICs with under-voltage lockout and programmable dead-time

  • 🔒 Protection Circuits – Built-in over-current protection (OCP), over-voltage protection (OVP), and thermal shutdown

  • 🧲 EMI Suppression – Snubber networks and input/output filter capacitors for reduced electromagnetic interference

  • 🌐 Compact PCB – Double-layer FR-4 board with heavy copper pours and heatsink mounting pads

Category:

📊 Technical Specifications (Typical):

Parameter Details
MOSFET Device 18N50 (500 V, 18 A)
Configuration Half-bridge or full-bridge (2 or 4 devices)
Maximum Collector–Emitter Voltage (V<sub>DS</sub>) 500 V
Maximum Continuous Drain Current (I<sub>D</sub>) 18 A
R<sub>DS(on)</sub> at V<sub>GS</sub>=10 V ≤ 0.18 Ω
Gate Drive Voltage ±12 V–15 V
Switching Frequency Up to 50 kHz
PCB Size ~100 mm × 60 mm
Thermal Management Heatsink mounting holes & wide copper pours

🛠️ Applications:

  • Inverter-based ARC, MIG, and TIG welding machines

  • High-voltage DC–DC converters and power supplies

  • UPS modules and battery chargers

  • Motor drive inverters for pumps and compressors

  • Renewable-energy microinverters and grid-tie systems

18N50 MOSFET Card

Engineered for efficient, high-voltage switching in demanding power-conversion applications.

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