The FQD4N50 is an N-Channel MOSFET from Fairchild Semiconductor (now ON Semiconductor), designed for high-voltage power switching applications. As part of the QFET® family, it is engineered for efficient and reliable performance in demanding environments. This MOSFET is commonly used in power supplies, motor control, and other high-voltage switching circuits.

Applications:

• Switch Mode Power Supplies (SMPS): Employed in primary-side switching for high-voltage power supplies.
• Lighting Ballasts: Suitable for driving fluorescent and LED lighting systems.
• Uninterruptible Power Supplies (UPS): Provides efficient power switching for backup systems.
• Motor Control: Used in high-voltage motor control circuits.
• Power Factor Correction (PFC): Implemented in circuits to improve power factor.

Features:

• High Voltage Rating: 500V drain-source voltage for high-voltage applications.
• Fast Switching Speed: Enables high-frequency operation.
• Low Gate Charge: Reduces switching losses and improves efficiency.
• High Avalanche Energy: Ensures reliability under inductive load conditions.
• RoHS Compliant: Meets environmental standards.

Benefits:

• Robust Performance: High voltage and avalanche ratings ensure reliability.
• Efficient Switching: Low gate charge and fast switching speed.
• Simplified Design: Easy to drive and control.
• Reduced Heat Generation: Efficient design minimizes heat.
• Environmentally Friendly: Complies with RoHS standards.

Additional Details:

The FQD4N50 has a drain-source voltage (Vds) rating of 500V and a continuous drain current (Id) of 4A. The on-state resistance (Rds(on)) is typically 2.4 Ohms at Vgs = 10V. It is available in a TO-251 (IPA) or TO-252 (DPAK) package. This MOSFET is designed for high-voltage and fast-switching applications, making it suitable for demanding environments. Its avalanche capability offers enhanced protection against voltage spikes. The device operates over a wide temperature range, ensuring stable performance under various operating conditions.