Specification: Condition: 100% Brand New Operating Temperature: - 40 To 40 + 125 (Thyristor, Fast Thyristor); -40 + 150 (Rectifier Tube, Fast Recovery Diode, Ultra-Fast Recovery Diode) Humidity Relative: &Le;85% Altitude: Below 1000 Meters Module Installation Requirements And Suggestions: A) The Module Installation Surface Should Be Smooth Without Scratches, Bumps And Sundries; B) When Installing The Module On The Heat Sink, Gently Remove The Oxide Layer On The Surface Of The Heat Sink With Fine Sandpaper, Wipe The Surface Of The Heat Sink With Anhydrous Ethanol, Then Evenly Apply A Thin Layer Of Heat-Conductive Silica Gel To The Contact Surface Of The Copper Base Plate And The Heat Sink To Ensure Good Contact And Reduce Thermal Resistance ; C) When Fixing The Module On The Heat Sink Surface, Use M5 Or M6 Flat Batten And Spring Washer, And Tighten The Screw With Force Distance Of (5+1)Nm; D) The Wiring For The Main Electrode Of The Module Should Be A Copper Strip With A Smooth, Flat And Sufficient Contact Surface. The Contact Must Be Good. The Tightening Moment Of Force Must Be: If M5 Screws Are Used, The Moment Of Force Must Be (3) Nm; If M6 Screws Are Used, The Torque Is (5 + 1) Nm. If M8 Screws Are Used, The Torque Is (9 + 1) Nm.