CZRA4745

SURFACE MOUNT ZENER DIODE COMCHIP SMD DIODE SPECIALIST CZRA4740 thru CZRA4764 V oltage: 10-100 Volts Power: 1.0 Watts FEATURES - For surface mounted applications in order to optimize board space - Low profile package - Built-in strain relief - Glass passivated junction - Low inductance - Typical IR less than 5.0uA above 11V - High temper ature soldering : 260°C / 10 seconds at terminals - Plastic package has Underwriters Laboratory Flammability Classification 94V-O U DO-214AC (SMA) 0.067(1.70) 0.051(1.29) 0.180(4.57) 0.160(4.06) 0.110(2.79) 0.086(2.18) 0.012(0.31) 0.006(0.15) 0.091(2.31) 0.067(1.70) 0.059(1.50) 0.035(0.89) 0.008(0.20) 0.004(0.10) MECHANICAL DATA Case: JEDEC DO-214AC, Molded plastic over passivated junction Terminals: Solder plated, solderable per MIL-STD-750, method 2026 Polarity: Color band denotes positive end(cathode) Standard Packaging: 12mm tape(EIA-481) Weight: 0.002 ounce, 0.064 gram 0.209(5.31) 0.185(4.70) Dimensionsininchesand(millimeters) Maximum Ratings and Electrical Characterics Ratings at 25°C ambient temperature unless otherwise specified. Peak Pulse Power Dissipation on T A= 50°C (Note A) Derate above 50°C Peak forward Surge Current 8.3ms single half sine-wave superimposed on rated load(JEDEC Method) (Note B) Operating Junction and Storage Temperature Range NOTES: 2 A. Mounted on 5.0mm (.013mm thick) land areas. B. Measured on 8.3ms, single half sine-wave or equivalent square wave, duty cycle = 4 pulses per minute maximum. SYMBOL PD IFSM TJ,TSTG VALUE 1.0 6.67 10 -55 to +150 UNITS Watts mW/°C Amps °C MDS0208021B Comchip Technology Corporation • Tel: 510-657-8671 • Fax: 510-657-8921 • www.comchiptech.com Page 1 SURFACE MOUNT ZENER DIODE COMCHIP SMD DIODE SPECIALIST M DS0208021B Comchip Technology Corporation • Tel: 510-657-8671 • Fax: 510-657-8921 • www.comchiptech.com Page 2 S URFACE SURFACE MOUNT ZENER DIODE RATING AND CHARACTERISTICS CURVES CZRA4740 THRU CZRA4764 PD, MAXIMUM POWER DISSIPATION (WATTS) COMCHIP SMD DIODE SPECIALIST 1.25 1.0 0.75 0.50 0.25 0 0 L = LEAD LENTGH TO HEAT SINK 20 40 60 80 100 120 140 160 180 200 TL, LEAD TEMPERATURE Fig. 1-POWER TEMPERATURE DERATING CURVE VZ, TEMPERATURE COEFFICIENT (mV/°C) 100 VZ, TEMPERATURE COEFFICIENT(mV/W) 70 50 30 20 10 7.0 5.0 3.0 2.0 1.0 10 20 30 50 70 100 RANGE VZ @ IZT +12 +10 +8.0 +6.0 +4.0 +2.0 0 -2.0 -4.0 2 VZ @ IZT RANGE 3 4 5 6 7 8 9 10 11 12 VZ, ZENER VOLTAGE (VOLTS) VZ, ZENER VOLTAGE (VOLTS) Fig. 2-TEMPERATURE COEFFICIENTS (-55°C TO +150°C TEMPERATURE RANGE; 90% OF THE UNITS ARE IN THE RANGES INDICATED.) 175 JL, JUNCTION TO LEAD THERMAL RESISTANCE (°C/W) 150 125 100 75 50 25 0 0 .1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 VZ, TEMPERATURE COEFFICIENT (mV/w) +6.0 +4.0 NOTE:BELOW 3 VOLTS AND ABOVE 8 CHANGES IN ZENER CURRENT DO AFFECT TEMPERATURE 20mA +2.0 0 -2.0 -4.0 3 1.0mA 0.01mA VZ @ IZT TA = 25°C 6 7 8 4 5 L, LEAD LENGTH TO HEAT SINK (INCKES) VZ, ZENER VOLTAGE (VOLTS) Fig.3-TYPICAL THERMAL RESISTANCE VERSUS LEAD LENGTH Fig. 4-EFFECT OF ZENER CURRENT MDS0208021B Comchip Technology Corporation • Tel: 510-657-8671 • Fax: 510-657-8921 • www.comchiptech.com Page3 S URFACE SURFACE MOUNT ZENER DIODE COMCHIP SMD DIODE SPECIALIST RATING AND CHARACTERISTICS CURVES CZRA4740 THRU CZRA4764 Ppk, peak surge power (watts) 100 70 50 30 20 10 7.0 5.0 3.0 2.0 1.0 0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100 200 500 11V-91V NON-REPETITIVE 5% DUTY CYCLE 0.8V-10V NON-REPETITIVE RECTANGULAR WAVEFORM TJ = 25°C PRIOR TO INITIAL PULSE 10% DUTY CYCLE 20% DUTY CYCLE PW, PULSE WIDTH This graph represents 90 percentile data point. For worst-case design characteristics, multiply surge power by 2/3 Fig. 5-MAXIMUM SURGE POWER 1000 1000 700 500 I = 1.0mA Z 200 100 5.0mA 70 50 20mA 20 10 7 5 2 1 1.0 Zz, dynamic impedance (ohms) Zz, dynamic impedance (ohms) 500 200 100 50 20 10 5.0 2.0 1.0 0.1 0.2 0.5 1.0 2.0 5.0 TJ = 25°C IZ(ms) = 0.1IZ(dc) f = 60Hz TJ = 25°C IZ(ms) = 0.1IZ(dc) f = 60Hz 47V 27V 0.8V 10 20 50 100 2.0 3.0 5.0 7.0 10 20 30 50 70 100 IZ, ZENER CURRENT (mA) IZ, ZENER CURRENT (mA) Fig. 6-EFFECT OF ZENER CURRENT ON ZENER IMPEDANCE Fig. 7-EFFECT OF ZENER VOLTAGE ON ZENER IMPEDANCE MDS0208021B Comchip Technology Corporation • Tel: 510-657-8671 • Fax: 510-657-8921 • www.comchiptech.com Page 4