友順科技股份有限公司 Unisonic Technologies Co., Ltd. Application Note Heatsink Screw Mounting It is recommended that a metal washer is inserted between screw head and mounting tab. Do not use self-tapping screws. Mounting torque for screw mounting (for thread-forming screws the values are final values): • Minimum torque for good heat transfer is 0.50 Nm • Maximum torque to avoid damaging the device is 0.80 Nm. UNISONIC TECHNOLOGIES CO., LTD 1 www.unisonic.com.tw 發 行 ＦＯＲ ＩＳＳＵＥ Feb 12 2015 文 件 管 理 中 心 UTC Doc.Control Center 友順科技股份有限公司 Unisonic Technologies Co., Ltd. ■ Typical and maximum mounting torque value Package Typ (Nm) Max (Nm) Remark TO‐247 0.50 0.80 Screw M3 TO‐220 0.50 0.80 Screw M3 TO‐220F 0.50 0.80 Screw M3 Note1: For TO‐220F products speaking, customer used automatic screw driver process; please contact our business representative for confirming product body’s burr and the size of screw hole. UNISONIC TECHNOLOGIES CO., LTD 2 www.unisonic.com.tw 發 行 ＦＯＲ ＩＳＳＵＥ Feb 12 2015 文 件 管 理 中 心 UTC Doc.Control Center