31DQ03 THRU 31DQ04 30V-40V SCHOTTKY RECTIFIER 3.3A FEATURES Low profile, axial leaded outline High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance Very low forward voltage drop High frequency operation Guard ring for enhanced ruggedness and long term reliability MECHANICAL DATA : * Case : DO-201AD Molded plastic * Epoxy : UL94V-O rate flame retardant * Lead : Axial lead solderable per MIL-STD-202, Method 208 guaranteed * Polarity : Color banddenotes cathode end * Mounting position : Any * Weight : 1.1 grams MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Rating at 25 °C ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20%. RATING SYMBOL 31DQ03 31DQ04 UNIT Maximum Recurrent Peak Reverse Voltage VRRM 30 40 V Maximum DC Blocking Voltage VDC 30 40 V Maximum Average Forward Current IF(AV) 3.3 A IFSM 120 A Maximum Forward Voltage at IF = 3.0 A VF 0.55 V Maximum Reverse Current at VR = VRRM , Tj = 25°C IR 3.0 mA Junction Temperature Range TJ - 40 to + 150 °C Storage Temperature Range TSTG - 40 to + 150 °C at Ambient Temperature , Tc = 48 °C Maximum Non-repetitive Peak Forward Surge Current ( 50 Hz, Sine wave, 10ms ) E-mail: [email protected] 1 of 2 Web Site: www.taychipst.com 31DQ03 THRU 31DQ04 30V-40V SCHOTTKY RECTIFIER 3.3A RATINGS AND CHARACTERISTIC CURVES 31DQ03 THRU 31DQ04 100 100 T J = 150˚C Reverse Current - IR (mA) Instantaneous Forward Current - IF (A) 10 10 125˚C 1 0.1 0.01 25˚C 0.001 0 10 20 30 40 Reverse Voltage - VR (V) Fig. 2 - Typical Values Of Reverse Current Vs. Reverse Voltage REVERSE CURRENT, MILLIAMPERES TJ = 150˚C TJ = 125˚C 1 TJ = 25˚C 0.1 0 0.3 0.6 0.9 1.2 10 TJ= 100 °C 1.0 TJ = 25 °C 0.1 0.01 0 20 40 60 80 100 120 140 PERCENT OF RATED REVERSE VOLTAGE, (%) Forward Voltage Drop - VFM (V) Fig. 1 - Max. Forward Voltage Drop Characteristics FIG.3 - TYPICAL REVERSE CHARACTERISTICS 20 2.5 1.0 Average Power Loss (Watts) FORWARD CURRENT, AMPERES 10 Tj = 25 °C 0.1 0.01 0.001 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 D = 0.20 D = 0.25 D = 0.33 D = 0.50 D = 0.75 2 1.5 DC RMS Limit 1 0.5 1.1 0 FORWARD VOLTAGE, VOLTS 0 FIG.4 - TYPICAL FORWARD CHARACTERISTICS 1 2 3 4 5 Average Forward Current - IF(AV) (A) Fig. 5- Forward Power Loss Characteristics (2) Formula used: TC = TJ - (Pd + PdREV) x RthJC ; Pd = Forward Power Loss = IF(AV) x VFM @ (IF(AV) / D) (see Fig. 6); PdREV = Inverse Power Loss = VR1 x IR (1 - D); IR @ VR1 = 80% rated VR E-mail: [email protected] 2 of 2 Web Site: www.taychipst.com