COMCHIP Schottky Barrier Rectifier SMD Diodes Specialist SR302-G Thru. SR308-G Forward current: 3.0A Reverse voltage: 20 to 80V RoHS Device Features DO-27 -Fast switching. -Low forward voltage, high current capability. 0.052(1.30) 0.048(1.20) -Low power loss, high efficiency. 1.0(25.4) min. -High current surge capability. -High temperature soldering guaranteed: 250 OC/10 seconds, 0.375" (9.5mm) lead length at 5lbs (2.3kg) tension. 0.375(9.50) 0.335(8.50) Mechanical Data 0.220(5.60) -Case: transfer molded plastic. 0.197(5.00) -Epoxy: UL94V-0 rate flame retardant. 1.0(25.4) min. -Polarity: color band denoted cathode end. -Lead: plastic axial lead, solderable per MIL-STD202E, method 208C. -Mounting position: any. Dimensions in inches and (millimeter) -Weight: 0.042 ounce, 1.19 gram. Maximum Ratings and Electrical Characteristics O Ratings at Ta=25 C unless otherwise noted. Single phase, half wave, 60Hz, resistive or inductive loaded. For capacitive load, derate current by 20% . Symbol SR302 SR303 SR304 SR305 SR306 SR308 Parameter -G -G -G -G -G -G Unit Maximum repetitive peak reverse voltage V RRM 20 30 40 50 60 80 V Maximum RMS voltage V RMS 14 21 28 35 42 57 V Maximum DC blocking voltage V DC 20 30 40 50 60 80 V Maximum average forward TL=75 C (SR302-G ~ SR304-G) rectified current, 0.375" TL=100 C (SR305-G ~ SR308-G) (9.5mm) lead length at O O Peak forward surge current, 8.3ms single half sinewave, superimposed on rated load (JEDEC method) Maximum instantaneous forward voltage at I F =3A Maximum DC reverse current at rated DC blocking voltage (Note 1) Typical junction capacitance (Note 2) Typical thermal resistance (Note 3) Operating junction temperature range Storage temperature range T A =25 OC T A =100 OC I AV 3.0 A I FSM 150 A VF 0.75 0.55 0.80 V IR 3.0 30 mA CJ 200 pF RJA 40 TJ T STG -65 ~ +125 O -65 ~ +150 -65 ~ +150 C/W O C O C Note: 1. Test pulse: 300S pulse width, 1% duty cycle. 2. Measured at 1MHz and applied reverse voltage of 4.0V. 3. Thermal resistance from junction to ambient P.C.B. mounted with 0.375" (9.5mm) lead length with 2.5"x2.5"(63.5x63.5mm) copper pads. REV:A QW-BB018 Page 1 COMCHIP Schottky Barrier Rectifier SMD Diodes Specialist RATING AND CHARACTERISTIC CURVES (SR302-G Thru. SR308-G) Fig.2 Maximum Non-Repetitive Peak Forward Surge Current I FSM , Peak Forward Surge Current (A) Fig.1 Typical Forward Current Derating Curve SR 08- R30 R3 ~S ~S -G 2 -G 302 305 SR G 4-G I AV , Average Forward Current (A) 3 1 Single phase, half wave 60Hz Inductive or resistive load 0.375" (9.5mm) lead length 0 8.3ms single half sine-wave (JEDEC method) 150 100 50 1 Cycle 0 0 50 25 75 100 125 150 175 1 10 T L , Lead Temperature ( OC) Fig.4 Typical Reverse Characteristics I R , Instantaneous Reverse Voltage (mA) I F , Instantaneous Forward Current (A) Fig.3 Typical Instantaneous Forward Characteristics 100 SR302-G~SR304-G SR305-G~SR308-G 10 1 0.1 T J =25 OC Pulse width=300s 1% duty cycle 0.01 0 0.2 0.4 0.6 0.8 1.0 100 Number of Cycles at 60Hz 1.2 1.4 V F , Instantaneous Forward Voltage (V) 10 T J =125 O 1.0 T J =75 OC 0.1 0.01 O T J =25 C SR302-G~SR304-G SR305-G~SR308-G 0.001 0 20 40 60 80 100 120 140 Percent of Rated Peak Reverse Voltage (%) Fig.5 Typical Junction Capacitance C J , Junction Capacitance (pF) 1000 SR502-G~SR504-G SR505-G~SR508-G 100 T J =25 OC f=1MHz V sig =50mV 10 0.1 1 10 100 V R , Reverse Voltage (V) REV:A QW-BB018 Page 2