Fairchild Semiconductor FQPF12N60: A Robust N-Channel MOSFET for High-Voltage Applications

The FQPF12N60 from Fairchild Semiconductor is a high-reliability N-Channel MOSFET designed for demanding power electronics applications. With its 600V drain-to-source voltage rating and 5.8A continuous current capability, this MOSFET delivers exceptional performance in switch-mode power supplies, motor drives, and industrial systems. Although marked as obsolete, it remains a popular choice for engineers needing proven high-voltage switching solutions.

Detailed Technical Specifications

Electrical Characteristics

• Drain-Source Voltage (V_DSS): 600V
• Continuous Drain Current (I_D): 5.8A @ 25 C
• Pulsed Drain Current: 23A
• Gate-Source Voltage (V_GS): 30V
• Threshold Voltage (V_GS(th)): 2-4V

Conduction Parameters

• On-Resistance (R_DS(on)): 700m @ 2.9A, 10V
• Total Gate Charge (Q_g): 54nC @ 10V
• Input Capacitance (C_iss): 1900pF @ 25V

Thermal Properties

• Power Dissipation: 55W
• Operating Junction Temperature: -55 C to +150 C
• Thermal Resistance Junction-to-Case: 2.5 C/W

Advanced Features and Benefits

1. Superior Switching Performance

The FQPF12N60 combines fast switching speeds with minimal switching losses, thanks to its optimized gate charge characteristics. The 54nC total gate charge enables efficient operation at frequencies up to several hundred kHz, making it suitable for modern power conversion topologies.

2. Enhanced Reliability

Fairchild's advanced manufacturing process ensures:

• Excellent avalanche energy capability
• High dv/dt immunity
• Robust body diode characteristics
• Improved hot carrier immunity

3. TO-220F-3 Package Advantages

The full-pack TO-220F-3 package offers:

• Superior thermal performance
• Creepage and clearance distances meeting international safety standards
• Mechanical robustness for industrial environments
• Compatibility with standard mounting hardware

Comprehensive Application Guide

Power Supply Designs

The FQPF12N60 excels in:

• AC-DC converters for industrial equipment
• Flyback converters up to 300W
• Forward converters with synchronous rectification
• PFC (Power Factor Correction) circuits

Motor Control Solutions

Ideal for:

• Brushless DC motor drives
• Stepper motor controllers
• AC induction motor VFDs (Variable Frequency Drives)
• Servo motor power stages

Industrial Systems

Widely used in:

• Industrial automation power modules
• Welding equipment
• UPS (Uninterruptible Power Supply) systems
• High-voltage DC-DC converters

Design Considerations

Gate Driving Requirements

For optimal performance:

• Use 10-15V gate drive voltage
• Implement proper gate resistance (typically 10-100 )
• Consider using gate driver ICs for high-frequency operation

Thermal Management

Recommended practices:

• Use thermal pads or grease for heatsink mounting
• Maintain junction temperature below 125 C for long-term reliability
• Consider forced air cooling for high-power applications

Why Engineers Choose FQPF12N60

Despite newer alternatives, the FQPF12N60 remains popular because:

• Proven reliability in harsh environments
• Cost-effective solution for medium-power applications
• Simple drive requirements compared to modern superjunction MOSFETs
• Excellent availability of technical documentation
• Compatibility with existing designs

Obsolete Status and Replacement Options

While the FQPF12N60 is obsolete, we maintain stock for:

• Legacy system maintenance
• Prototype development
• Low-volume production runs

For new designs, consider these potential alternatives:

• FQP12N60C - Similar specifications with improved R_DS(on)
• IRF840 - Comparable voltage/current ratings
• STP12NK60Z - Superjunction alternative with better efficiency

Technical Support and Resources

We provide:

• Detailed datasheets and application notes
• SPICE models for simulation
• Reference designs for common applications
• Expert technical consultation

Ordering Information

Available in:

• Single unit quantities for prototyping
• Reel packaging for production
• Custom quantities available

Contact our sales team for current pricing and lead times. We offer worldwide shipping and local technical support to ensure your success with the FQPF12N60 MOSFET.