SIYU R FR251G ...... FR257G 塑封快恢复整流二极管 Plastic Fast Recover Rectifier Reverse Voltage 50 to 1000V Forward Current 2.5A 反向电压 50 ---1000 V 正向电流 2.5 A 特征 Features DO-15L 25.4 ·玻璃钝化芯片 Glass passivated chip ·反向漏电流低 Low reverse leakage ·正向浪涌承受能力较强 0.8±0.1 MIN 7.5±0.2 4.0±0.2 25.4 MIN 机械数据 Mechanical Data ·端子: 镀锡轴向引线 Terminals: Plated axial leads ·极性: 色环端为负极 Polarity: Color band denotes cathode end ·安装位置: 任意 Mounting Position: Any Unit：mm 极限值和温度特性 TA = 25℃ 除非另有规定。 Maximum Ratings & Thermal Characteristics 符号 Symbols 最大可重复峰值反向电压 Maximum repetitive peak reverse voltage 最大均方根电压 Maximum RMS voltage 最大直流阻断电压 Maximum DC blocking voltage 最大正向平均整流电流 Maximum average forward rectified current 峰值正向浪涌电流 8.3ms单一正弦半波 Peak forward surge current 8.3 ms single half sine-wave 典型热阻 High forward surge capability ·高温焊接保证 High temperature soldering guaranteed: 260℃/10 秒, 0.375" (9.5mm)引线长度。 260℃/10 seconds, 0.375" (9.5mm) lead length, ·引线可承受5 磅 (2.3kg) 拉力。 5 lbs. (2.3kg) tension ·引线和管体皆符合RoHS标准 。 Lead and body according with RoHS standard Typical thermal resistance 工作结温和存储温度 Operating junction and storage temperature range Ratings at 25℃ ambient temperature unless otherwise specified. FR251G FR252G FR253G FR254G FR255G FR256G FR257G 单位 Unit VRRM 50 100 200 400 600 800 1000 V VRMS 35 70 140 280 420 560 700 V VDC 50 100 200 400 600 800 1000 V IF(AV) 2.5 A IFSM 80 A RθJA 15 ℃/W ℃ -55 --- +150 Tj, TSTG 电特性 TA = 25℃ 除非另有规定。 Electrical Characteristics Ratings at 25℃ ambient temperature unless otherwise specified. 符号 Symbols 最大正向电压 Maximum forward voltage 最大反向电流 Maximum reverse current 最大反向恢复时间 Type junction capacitance 单位 Unit IF = 2.5A VF 1.3 V TA= 25℃ TA=100℃ IR 5.0 200 μA IF=0.5A IR=1.0A IRR=0.25A MAX. Reverse Recovery Time 典型结电容 FR251G FR252GFR253GFR254G FR255G FR256G FR257G VR = 4.0V, f = 1MHz trr Cj 150 300 45 nS pF 大昌电子 DACHANG ELECTRONICS SIYU R FR251G ...... FR257G 特性曲线 Characteristic Curves 正向特性曲线（典型值） 正向电流降额曲线 TYPICAL FORWARD CHARACTERISTIC FORWARD CURRENT DERATING CURVE 10mm 平均正向电流 IF(AV) (A) IF(A) Average Forward Rectified Current (A) IF Instantaneous Forward Current (A) 正向电流 IF(A) 10 2 1 0.2 Tj = 25 °C 0.1 0.01 0.6 0.8 1 1.2 1.4 1.6 正向电压 VF(V) VF Instantaneous Forward Voltage (V) 10mm 3.0 2.5 2.0 1.5 1.0 0.5 0 0 25 50 75 100 125 150 175 环境温度 Ta(°C) Tamb, ambient temperature (°C) 浪涌特性曲线（最大值） MAXIMUM NON REPETITIVE PEAK FORWARD SURGE CURRENT IFSM Peak Forward Surge Current (A) 峰值正向浪涌电流 IFSM(A) 100 80 60 40 20 0 1 2 4 6 10 20 40 100 通过电流的周期 Number of Cycles at 60 Hz. 大昌电子 DACHANG ELECTRONICS