HER251 THRU HER258 HIGH EFFICIENCY RECTIFIERS Reverse Voltage - 50 to 1000 Volts Forward Current - 2.5 Amperes FEATURES R-3 The plastic package carries Underwriters Laboratory Flammability Classification 94V-0 High speed switching for high efficiency Low reverse leakage High forward surge current capability High temperature soldering guaranteed: 250 C/10 seconds,0.375”(9.5mm) lead length, 5 lbs. (2.3kg) tension φ 0.160( 4.1 ) φ0.138 ( 3.5 ) 0.042(1.1) 0.040(1.0) MECHANICAL DATA 0.160(4.1) 0.138(3.5) Min.1.0 ( 25.4 ) Min.1.0 ( 25.4 ) Dimensions in inches and (millimeters) Case: JEDEC R-3 molded plastic body Terminals: Plated axial leads, solderable per MIL-STD-750, Method 2026 Polarity: Color band denotes cathode end Mounting Position: Any Weight:0.012 ounce, 0.58 grams MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 C ambient temperature unless otherwise specified. Single phase half-wave 60Hz,resistive or inductive load,for capacitive load current derate by 20%. MDD Catalog Number Maximum repetitive peak reverse voltage Maximum RMS voltage Maximum DC blocking voltage Maximum average forward rectified current 0.375”(9.5mm) lead length at TA=50 C Peak forward surge current 8.3ms single half sine-wave superimposed on rated load (JEDEC Method) Maximum instantaneous forward voltage at 2.5A Maximum DC reverse current TA=25 C at rated DC blocking voltage TA=100 C Maximum reverse recovery time (NOTE 1) Typical junction capacitance (NOTE 2) Typical thermal resistance (NOTE 3) Operating junction and storage temperature range SYMBOLS HER VRRM VRMS VDC 251 HER 252 50 35 50 100 70 100 HER 253 HER HER 254 255 200 300 140 210 200 300 400 280 400 HER 256 HER 257 HER 258 UNITS 600 420 600 800 560 800 1000 700 1000 VOLTS VOLTS VOLTS I(AV) 2.5 Amps IFSM 60.0 Amps VF 1.3 1.0 IR trr CJ RθJA TJ,TSTG 1.70 5.0 100.0 Volts µA 50 70 ns 30.0 20.0 pF C/W C 50.0 -65 to +150 Note:1.Reverse recovery condition IF=0.5A,IR=1.0A,Irr=0.25A 2.Measured at 1MHz and applied reverse voltage of 4.0V D.C. 3.Thermal resistance from junction to ambient at 0.375”(9.5mm)lead length,P.C.B. mounted FIG. 1- FORWARD CURRENT DERATING CURVE 3 Single Phase Half Wave 60HZ Resistive or Inductive Load 2.0 1 0 0 25 50 75 100 125 150 175 200 PEAK FORWARD SURGE CURRENT, AMPERES AVERAGE FORWARD RECTIFIED CURRENT, AMPERES RATINGS AND CHARACTERISTIC CURVES HER251 THRU HER258 FIG. 2-MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT 60 50 40 30 8.3ms SINGLE HALF SINE-WAVE (JEDEC Method) 20 10 1 10 AMBIENT TEMPERATURE, C 20 TJ=25 C PULSE WIDTH=300 µs 1%DUTY CYCLE 1 0.1 HER251-HER253 HER254-HER255 HER256-HER258 0.01 0.2 0.6 1.0 1.4 1.8 2.0 FIG. 4-TYPICAL REVERSE CHARACTERISTICS INSTANTANEOUS REVERSE CURRENT, MICROAMPERES INSTANTANEOUS FORWARD CURRENT,AMPERES FIG. 3-TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 10 1,000 100 TJ=100 C 10 1 TJ=25 C 0.1 0.01 INSTANTANEOUS FORWARD VOLTAGE, VOLTS 0 20 40 60 80 100 TJ=25 C 10 HER251-HER255 HER256-HER258 TRANSIENT THERMAL IMPEDANCE, C/W 200 FIG. 6-TYPICAL TRANSIENT THERMAL IMPEDANCE 100 10 1 0.1 0.01 0.1 1 10 1 0.1 1.0 10 REVERSE VOLTAGE,VOLTS 100 PERCENT OF PEAK REVERSE VOLTAGE,% FIG. 5-TYPICAL JUNCTION CAPACITANCE JUNCTION CAPACITANCE, pF 100 NUMBER OF CYCLES AT 60 Hz 100 t,PULSE DURATION,sec. The cruve graph is for reference only, can't be the basis for judgment(曲线图仅供参考)! 100