Bulletin I20262 05/96 8AF SERIES PRESSFIT RECTIFIER DIODES 50 A Features and Descriptions Convenient pressfit package Available with and without leads High surge capabilities Fully characterised bulletin Major Ratings and Characteristics Parameters 8AF Units 50 A 150 °C 79 A @ 50Hz 714 A @ 60Hz 747 A @ 50Hz 2546 A2s @ 60Hz 2324 A2s 25455 A2√s V RRM range 50 to 400 V TJ - 65 to 195 I F(AV) @ TC I F(RMS) I FSM 2 I t I 2√t www.irf.com o C IR Case Style B-47 1 8AF Series Bulletin I20262 05/96 ELECTRICAL SPECIFICATIONS Voltage Ratings Voltage VRRM , maximum repetitive VRSM , maximum non- IRRM max. Code peak reverse voltage V repetitive peak rev. voltage V @ TJ = TJ max 05 50 75 7 1 100 150 7 2 200 300 5 4 400 500 5 Type number 8AF mA Forward Conduction Parameter I F(AV) 8AF Units Conditions Maximum average forward current 50 A @ Case temperature 150 °C 180° conduction, half sine wave I F(RMS) Maximum RMS forward current 79 A I FSM Maximum peak, one-cycle forward, 714 A t = 10ms No voltage non-repetitive surge current 747 t = 8.3ms reapplied 600 t = 10ms 100% VRRM 628 t = 8.3ms reapplied Sinusoidal half wave, t = 10ms No voltage Initial TJ = TJ max. 2324 t = 8.3ms reapplied 1800 t = 10ms 100% VRRM 1643 t = 8.3ms reapplied I 2t I 2√t Maximum I2 t for fusing Maximum I2 √t for fusing 2546 A2s 25455 A2√s VF(TO)1 Low level value of threshold voltage 0.60 V (16.7% x π x IF(AV) < I < π x IF(AV)), T J = TJ max. VF(TO)2 High level value of threshold voltage 0.68 r f1 Low level value of forward slope resistance 6.66 mΩ (16.7% x π x IF(AV) < I < π x IF(AV)), T J = TJ max. r f2 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)), T J = TJ max. (π x IF(AV) < I < 20 x π x IF(AV)), T J = TJ max. V TJ = 25°C, IFM = π x rated I F(AV) Thermal and Mechanical Specifications Parameter 8AF TJ Max. junction operating temperature range - 65 to 195 Tstg Storage temperature range - 65 to 195 RthJC Max. thermal resistance, junction to case 0.60 RthCS Typical thermal resistance, case to heatsink 0.50 wt Approximate weight Case style Units Conditions °C K/W DC operation As per mounting details 10 (0.36) B-47 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 autodiode should then be press fitted, ensuring that the sides of the autodiode are kept parallel to the sides of the hole. 2 www.irf.com 8AF Series Bulletin I20262 05/96 ∆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 T J = TJ max. K/W Ordering Information Table Device Code 8AF 4 N LV 1 2 3 4 1 - 2 - Essential part number 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 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 8AF Series RthJC (DC) = 0.6 K/W 190 180 Conduction Angle 170 160 150 90° 30° 60° 120° 180° 140 8AF Series RthJC (DC) = 0.6 K/W 190 180 Conduction Period 170 160 150 30° 90° 60° 120° 20 30 180° DC 140 5 10 15 20 25 30 35 40 45 50 55 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 2K /W K/ W A thS Maximum Average Forward Power Loss (W) 0 200 Maximum Allowable Case Temperature (°C) Maximum Allowable Case Temperature (°C) Bulletin I20262 05/96 = 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 Average Forward Current (A) 25 50 75 100 125 150 Maximum Allowable Ambient Temperature (°C) 90 R DC 180° 120° 90° 60° 30° 80 70 60 1.5 SA th Maximum Average Forward Power Loss (W) Fig. 3 - Forward Power Loss Characteristics K/ W = 1 2K /W RMS Limit 50 K/ W -D el ta 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 80 0 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 05/96 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 1 Fig. 6 - Maximum Non-Repetitive Surge Current 1 Transient Thermal Impedance Z thJC (K/W) 1000 Instantaneous Forward Current (A) 0.1 Pulse Train Duration (s) Number Of Equal Amplitude Half Cycle Current Pulses (N) 8AF Series 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 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