Fairchild FFPF20UP40S Data Handbook
Summary
This ultra-fast, high-reliability rectifier is rated for 20A and 400V, providing low forward voltage drop and rapid switching speeds essential for advanced power systems. It is ideally suited for industrial applications, boosting diodes in PFC or SMPS circuitry, and use as freewheeling devices in avalanche energy rated supplies. The manual serves as a comprehensive technical resource, detailing absolute maximum ratings, electrical characteristics, thermal performance analysis, and typical switching graphs needed by power electronics engineers during design and integration.
Page 1 Text Content
November
FFPF20UP40S
Features 20A, 400V UItra Fast Rectifier
The FFPF20UP40S is a u Itrafast rectifier with low forward
High Speed Switching, trr < 50ns
voltage drop. This device is intended for use as freewheeling and
High Reverse Voltage and High Reliability clamping rectifiers in a variety of switching power supplies and
other power switching applications. It is specially suited for use in
Avalanche Energy Rated
switching power supplies and industrial application.
Max Forward Voltage, VF < 1.4V
Ro HS Compliant
Applications Boost Diode in PFC and Switching Mode Power Supply Freewheeling diodes
TO-220F-2L
1. Cathode 2. Anode
1. Cathode 2. Anode
Absolute Maximum Ratings TC = 25o C unless otherwise noted Symbol Parameter Ratings Units VRRM Peak Repetitive Reverse Voltage VRWM Working Peak Reverse Voltage VR DC Blocking Voltage
IF(AV) Average Rectified Forward Current @ TC = 100
Non-repetitive Peak Surge Current
60Hz Single Half-Sine Wave
TJ, TSTG Operating and Storage Temperature Range -55 to +150
Thermal Characteristics Symbol Parameter Ratings Units
RθJC Maximum Thermal Resistance, Junction to Case 2.6
Package Marking and Ordering Information Device Marking Device Package Reel Size Tape Width Quantity FFPF20UP40S FFPF20UP40S TO-220F
©2010 Fairchild Semiconductor Corporation www.fairchildsemi.com1 FFPF20UP40S Rev. A
Page Summary Contents For Fairchild FFPF20UP40S Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 5 |
| File Size | 381.37 KB |
| Published | July 10, 2026 |
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Frequently Asked Questions
What is the maximum average forward current rating for this rectifier?
The device can handle an average rectified forward current of 20A.
In what types of power supplies or components is this designed to be used?
It is suited for freewheeling diodes in switching power supplies, PFC Boost Diodes, and industrial applications.
What are the acceptable operating temperature limits?
The device has an operating and storage temperature range spanning from -55 to +150°C.
What is the specified package type and thermal resistance?
It comes in a TO-220F-2L package with a maximum thermal resistance (θJC) of 2.6 °C/W.