Bulletin I20262 Rev.A 06/03 8AF SERIES PRESSFIT RECTIFIER DIODES Features and Descriptions 50 A Convenient pressfit package Available with and without leads High surge capabilities Application Welders, Battery charges, Alternators Major Ratings and Characteristics Parameters 8AF Units 50 A @ TC 150 °C 79 A @ 50Hz 714 A @ 60Hz 747 A @ 50Hz 2546 A 2s @ 60Hz 2324 A 2s 25455 A2√s IF(AV) IF(RMS) IFSM 2 I t I2√t VRRM range 100 to 800 V TJ - 65 to 195 o www.irf.com C IR Case Style B-47 1 8AF Series Bulletin I20262 Rev.A 06/03 ELECTRICAL SPECIFICATIONS Voltage Ratings Type number Voltage Code VRRM , maximum repetitive peak reverse voltage V VRSM , maximum nonrepetitive peak rev. voltage V @ TJ = 150°C 1 100 150 5 2 200 300 5 4 400 500 5 8 800 900 5 8AF IRRM max. mA Forward Conduction Parameter IF(AV) 8AF Units Conditions Maximum average forward current 50 A @ Case temperature 150 °C 180° conduction, half sine wave IF(RMS) Maximum RMS forward current 79 A IFSM Maximum peak, one-cycle forward, 714 A non-repetitive surge current 747 t = 8.3ms reapplied 600 t = 10ms 100% VRRM t = 8.3ms reapplied Sinusoidal half wave, Initial TJ = TJ max. 628 It 2 I2√t Maximum I t for fusing 2 Maximum I2√t for fusing VF(TO)1 Low level value of threshold voltage 2546 As t = 10ms No voltage t = 10ms No voltage 2324 t = 8.3ms reapplied 1800 t = 10ms 100% VRRM 1643 t = 8.3ms reapplied 2 25455 A2√s 0.60 V (16.7% x π x IF(AV) < I < π x IF(AV)), TJ = TJ max. mΩ (16.7% x π x IF(AV) < I < π x IF(AV)), TJ = TJ max. VF(TO)2 High level value of threshold voltage 0.68 rf1 Low level value of forward slope resistance 6.66 rf2 High level value of forward slope resistance 6.25 VFM Maximum forward voltage drop 1.45 t = 0.1 to 10ms, no voltage reapplied (π x IF(AV) < I < 20 x π x IF(AV)), TJ = TJ max. (π x IF(AV) < I < 20 x π x IF(AV)), TJ = TJ max. V TJ = 25°C, IFM = π x rated IF(AV) Thermal and Mechanical Specifications Parameter 8AF TJ Max. junction operating temperature range - 65 to 195 Tstg Storage temperature range - 65 to 195 R thJC Max. thermal resistance, junction to case 0.60 R thCS Typical thermal resistance, case to heatsink 0.50 wt Approximate weight Case style 10 (0.36) B-47 Units Conditions °C K/W DC operation As per mounting details g (oz) See outline table MOUNTING: A 12.6 ± 0.02mm (0.496 to 0.497 inch) diameter hole should be drilled in heatsink, the leading edge chamfered to 0.038mm (0.015 inch) x 45°. The diode should then be press fitted, ensuring that the sides of the diode are kept parallel to the sides of the hole. 2 www.irf.com 8AF Series Bulletin I20262 Rev.A 06/03 ∆RthJC Conduction (The following table shows the increment of thermal resistance RthJC when devices operate at different conduction angles than DC) Conduction angle Sinusoidal conduction Rectangular conduction 180° 0.042 0.026 120° 0.045 0.043 90° 0.06 0.06 60° 0.10 0.10 30° 0.15 0.15 Units Conditions TJ = TJ max. K/W Ordering Information Table Device Code 8AF 8 N LV 1 2 3 4 1 - Essential part number 2 - Voltage code: Code x 100 = VRRM (See Voltage Ratings Table) 3 - N = Normal Polarity (cathode to case) 4 - R = Reverse Polarity (anode to case) PP = Without Lead LH = Horizontal Lead LV = Vertical Lead Available as special product - Contact Factory Outline Table 15.8 (0.62) 12.5 (0.49) 7 (0.28) 0.9 (0.03) R 0.4 (0.02) 16.5 (0.65) 22.5 (0.89) 2.4 (0.09) 5 (0.20) 0.5 (0.02) 6 (0.24) DIA. 12.77 / 13.27 (0.50) / (0.52) All dimensions in millimeters (inches) www.irf.com 3 8AF Series 200 Maximum Allowable Case Temperature (°C) Maximum Allowable Case Temperature (°C) Bulletin I20262 Rev.A 06/03 8AF Series RthJC (DC) = 0.6 K/W 190 180 Conduction Angle 170 160 150 90° 30° 60° 120° 180° 140 5 10 15 20 25 30 35 40 45 50 55 8AF Series RthJC (DC) = 0.6 K/W 190 180 Conduction Period 170 160 150 30° 90° 60° 120° 20 30 180° DC 140 0 10 40 50 60 70 Average Forward Current (A) Average Forward Current (A) Fig. 1 - Current Ratings Characteristics Fig. 2 - Current Ratings Characteristics 80 70 60 80 R 180° 120° 90° 60° 30° 1.5 K/ W 2K /W SA th Maximum Average Forward Power Loss (W) 0 200 = 1 K/ W RMS Limit 50 -D el ta R 3K /W 40 5K /W 30 Conduction Angle 10 K/W 20 8AF Series TJ = 195°C 10 15 K/W 0 0 10 20 30 40 50 60 0 25 50 75 100 125 150 Maximum Allowable Ambient Temperature (°C) Average Forward Current (A) 90 R DC 180° 120° 90° 60° 30° 80 70 60 SA th Maximum Average Forward Power Loss (W) Fig. 3 - Forward Power Loss Characteristics 1.5 K/ W 2K /W RMS Limit 50 = 1K /W -D elt a R 3K /W 40 5K /W 30 Conduction Period 10 K/W 20 8AF Series TJ = 195°C 10 15 K/W 0 0 10 20 30 40 50 60 Average Forward Current (A) 70 0 80 25 50 75 100 125 150 Maximum Allowable Ambient Temperature (°C) Fig. 4 - Forward Power Loss Characteristics 4 www.irf.com 8AF Series Bulletin I20262 Rev.A 06/03 Peak Half Sine Wave Forward Current (A) At Any Rated Load Condition And With Rated V RRM Applied Following Surge. Initial TJ = 195°C @ 60 Hz 0.0083 s @ 50 Hz 0.0100 s 650 600 550 500 450 400 350 300 250 8AF Series 200 150 1 10 Peak Half Sine Wave Forward Current (A) 750 700 100 Maximum Non Repetitive Surge Current Versus Pulse Train Duration. Initial TJ = 195 °C No Voltage Reapplied Rated VRRM Reapplied 700 650 600 550 500 450 400 350 300 250 8AF Series 200 150 0.01 Fig. 5 - Maximum Non-Repetitive Surge Current 100 10 TJ = 25°C TJ = 195°C 1 0 1 2 3 4 5 6 7 Instantaneous Forward Voltage (V) Fig. 7 - Forward Voltage Drop Characteristics www.irf.com Fig. 6 - Maximum Non-Repetitive Surge Current Transient Thermal Impedance Z thJC (K/W) Instantaneous Forward Current (A) 8AF Series 1 Pulse Train Duration (s) Number Of Equal Amplitude Half Cycle Current Pulses (N) 1000 0.1 1 Steady State Value (DC Operation) 0.1 8AF Series 0.01 0.001 0.01 0.1 1 10 Square Wave Pulse Duration (s) Fig. 8 - Thermal Impedance ZthJC Characteristic 5