PRELIMINARY RAS00412XX WELDING DIODE Powerex, Inc., 173 Pavilion Ln, Youngwood, PA 15697-1800 724 925-7272 www.pwrx.com 12,000 Amperes 400 Volts Powerex General Purpose Rectifier Diodes are designed for low forward voltage drop to minimize conduction losses. They are made with molybdenum anode and cathode contacts to minimize thermal stresses during operation. FEATURES: Low On-State Voltage Excellent Surge and I2t Ratings APPLICATIONS: Welding Supplies DC Power Supplies Plating Supplies ORDERING INFORMATION Select the complete 10 digit Part Number using the table below. Example: RAS00412XX is a 400V 12,000A Welding Diode with a typical reverse recovery time of 25µs. Voltage Voltage Current Current Reverse PART Rating Code Rating Code Recovery VDRM-VRRM Itavg tRR RAS0 400V 04 12000A 12 XX 25µs typical Revised: Page 1 of 7 12/12/2013 PRELIMINARY RAS00412XX WELDING DIODE Powerex, Inc., 173 Pavilion Ln, Youngwood, PA 15697-1800 724 925-7272 12,000 Amperes 400 Volts www.pwrx.com Absolute Maximum Ratings Characteristic Repetitive Peak Reverse Voltage Average On-State Current, Tc=68°C RMS On-State Current, Tc=68°C Peak One Cycle Surge Current, 60Hz, VR=VRRM Fuse Coordination I2t, 60Hz Peak One Cycle Surge Current, 50Hz, VR=0V Fuse Coordination I2t, 50Hz Operating Temperature Storage Temperature Approximate Weight Rating Units 400 12000 18850 60,000 1.50E+07 57,300 1.64E+07 -40 to+175 -50 to+200 Volts A A A A2s A A2s °C °C 1.8 0.82 9,000 - 11,000 40 - 48.9 Mounting Force Information presented is based upon manufacturers testing and projected capabilities. This information is subject to change without notice. The manufacturer makes no claim as to suitability for use, reliability, capability or future availability of this product. Page 2 of 7 lb Kg lbs Knewtons PRELIMINARY RAS00412XX WELDING DIODE Powerex, Inc., 173 Pavilion Ln, Youngwood, PA 15697-1800 724 925-7272 Electrical Characteristics, Tj=25°C unless otherwise specified Characteristic Symbol Repetitive Peak Reverse Leakage Current Peak On-State Voltage VFM Model, Low Level VFM = VO + r•IFM VFM Model, High Level VFM = VO + r•IFM VFM Model, 4-Term High Level VFM= A + B•Ln(IFM) + IRRM VFM V0 r V0 r A B ½ C•(IFM) + D•(IFM) Reverse Recovery Time 12,000 Amperes 400 Volts www.pwrx.com Test Conditions min Rating typ max Units 100 1.00 0.978 ma V V 4.91E-03 mΩ Tj=175°C π•IFM - IFSM 0.749 V 9.75E-03 mΩ Tj=175°C 15%IFM - IFSM 0.325 Tj=175°C, VRRM=Rated Tj=25°C, IFM=4000A 15 Tj=175°C 15% IFM - π•IFM 0.113 0.0000172 -0.00514 C D tRR Tj=25°C, IFM=400A diR/dt = 25 A/µs 25 µs Thermal Characteristics Characteristic Thermal Resistance Junction to Case Case to Sink Thermal Impedance Model ZΘjc(t) = Symbol Test Conditions min Rating typ max Units RΘjc Double side cooled 0.008 °C/Watt RΘcs Double side cooled 0.004 °C/Watt ZΘjc Double side cooled Σ(A(N)•(1-exp(-t/Tau(N)))) where: Page 3 of 7 1 2 3 4 8.117E-04 1.144E-03 -2.274E-02 2.954E-02 5.632E-04 4.583E-03 1.292E-01 1.394E-01 PRELIMINARY RAS00412XX WELDING DIODE Powerex, Inc., 173 Pavilion Ln, Youngwood, PA 15697-1800 724 925-7272 12,000 Amperes 400 Volts www.pwrx.com MAXIMUM TRANSIENT THERMAL IMPEDANCE 1.0E-02 Thermal Impedance (°C/Watt) 9.0E-03 8.0E-03 7.0E-03 6.0E-03 5.0E-03 4.0E-03 3.0E-03 2.0E-03 1.0E-03 0.0E+00 0.001 0.01 0.1 1 10 Time (sec) Maximum On-State Voltage Drop 2.000 1.750 Tj = 175°C VFM (V) 1.500 1.250 1.000 0.750 0.500 1000 10000 IFM (A) Page 4 of 7 100000 PRELIMINARY RAS00412XX WELDING DIODE Powerex, Inc., 173 Pavilion Ln, Youngwood, PA 15697-1800 724 925-7272 12,000 Amperes 400 Volts www.pwrx.com 200 16000 160 14000 140 (Watts) 180 12000 Pavg 18000 8000 Pavg 10000 120 100 80 Tc 6000 60 4000 40 2000 20 0 0 2000 4000 6000 8000 10000 12000 0 14000 Maximum Allowable Case Temperature 180° Sine Wave 20000 (°C) Average Current Ratings Iavg (A) 200 18000 180 16000 160 (Watts) 12000 Pavg 14000 8000 140 Pavg 10000 120 100 80 Tc 6000 60 4000 40 2000 20 0 0 2000 4000 6000 8000 Iavg (A) Page 5 of 7 10000 12000 0 14000 Maximum Allowable Case Temperature 180° Square Wave 20000 (°C) Average Current Ratings PRELIMINARY RAS00412XX WELDING DIODE Powerex, Inc., 173 Pavilion Ln, Youngwood, PA 15697-1800 724 925-7272 12,000 Amperes 400 Volts www.pwrx.com Average Current Ratings 120° Square Wave 18000 180 16000 160 14000 (Watts) 140 12000 120 10000 100 Pavg Pavg 8000 80 Tc 6000 60 4000 40 2000 20 0 0 2000 4000 6000 8000 Iavg (A) Page 6 of 7 10000 12000 0 14000 (°C) 200 Maximum Allowable Case Temperature 20000 PRELIMINARY RAS00412XX WELDING DIODE Powerex, Inc., 173 Pavilion Ln, Youngwood, PA 15697-1800 724 925-7272 www.pwrx.com Page 7 of 7 12,000 Amperes 400 Volts