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ONSEMI FSDM311A Power Switch

The FSDM311A is a high-efficiency, Green Mode Fairchild Power Switch designed for off-line switch-mode power supplies, featuring an integrated SenseFET, fixed 67KHz frequency, and multiple protection functions including overload, over-voltage, and thermal shutdown. It simplifies power supply design by reducing external components, increasing reliability, and providing auto-restart and soft-start capabilities. Ideal for chargers, adapters, white goods, and monitor power supplies, it offers a compact, cost-effective solution with excellent efficiency and thermal performance.

Authorized Distributors
Source:DigiKey
Part No:FSDM311A
Stock:2534
Inv Date:06-10-2026
Price: Unit price: $1.74
Buy/RFQ:
Part No:FSDM311A
Stock:0
Inv Date:06-11-2026
Price: N/A
Buy/RFQ:

ONSEMI FSDM311A Power Switch Specifications:

  • Voltage Rating: 650V (Drain and Vstr pins)
  • Operating Frequency: 67KHz fixed
  • Maximum Drain Current: 0.5A (continuous at 25°C), Pulsed 15A
  • Power Dissipation: 1.40W
  • Operating Junction Temperature: Internally limited
  • Storage Temperature: -55°C to +150°C
  • Operating Ambient Temperature: -25°C to +85°C
  • Trigger Voltage (Vstart): 9V
  • Shutdown Voltage (Vstop): 7V
  • Soft-Start Time: 10-20ms
  • Over-Voltage Protection: 20V
  • Thermal Shutdown: 145°C
  • Maximum Duty Cycle: 67%
  • Feedback Voltage Range: 0.45V to 0.65V (burst mode thresholds)

Buy the Buy Fairchild FSDM311A Part Number FSDM311A Online

Discover the reliable and high-performance FSDM311A power switch, perfect for off-line switch-mode power supplies, chargers, and adapters. Featuring integrated SenseFET and fixed 67KHz frequency, it offers excellent efficiency with protection features including overload, over-voltage, and thermal shutdown. Its compact design and burst mode operation reduce power loss and noise, making it suitable for white goods, monitors, and mobile device chargers. Purchase the FSDM311A online today to enhance your power supply design with a robust, cost-effective component engineered for durability and energy efficiency.

Get Fairchild FSDM311A today—built for precision, efficiency, and long-lasting durability in switch-mode power supplies.

Frequently Asked Questions

Where can I buy ONSEMI FSDM311A?

You can click on the BUY or RFQ button to purchase FSDM311A from an authorized ONSEMI distributor.

How do I troubleshoot issues or seek technical support for part FSDM311A?

You can download the FSDM311A datasheet or visit the ONSEMI website for support.

Who is the manufacturer of FSDM311A?

ONSEMI

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