- 128 - 1sma5926 thru 1sma5945 surface mount silicon zener diode voltage range 11 to 68 volts 1.5 watts peak power features for surface mounted applications in order to optimize board space low profile package built-in strain relief glass passivated junction low inductance typical i r less than 0.5 a above 11v high temperature soldering guaranteed: 260 o c / 10 seconds at terminals plastic package has underwriters laboratory flammability classification 94v-0 mechanical data case: 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 ounces, 0.064 gram sma/do-214ac dimensions in inches and (millimeters) maximum ratings and electrical characteristics rating at 25 ambient temperature unless otherwise specified. type number symbol value units dc power dissipation at t l =75 o c, measure at zero lead length (note 1) derate above 75 o c p d 1.5 20 watts mw/ o c peak forward surge current, 8.3 ms single half sine-wave superimposed on rated load (jedec method) (note 1, 2) i fsm 10.0 amps operating and storage temperature range t j , t stg -55 to + 150 o c notes: 1. mounted on 5.0mm 2 (0.013mm thick) land areas. 2. measured on 8.3ms single half sine-wave or equivalent square wave, duty cycle=4 pulses per minute maximum. .062(1.58) .056(1.43) .012(.31) .006(.15) .008(.20) .004(.10) .056(1.41) .035(0.90) .187(4.75) .167(4.25) .210(5.33) .195(4.95) .111(2.83) .102(2.29) .103(2.30) .078(1.99)
- 129 - electrical characteristics (ta=25 o c unless otherwise noted) vf=1.5v max, if=200ma for all types. nominal maximum device zener voltage test dc zener device marking vz @ izt current current (note 1) code voltage izt zzt @ izt izm (notes 2) ma ohms ohms ma ua volts ma (dc) 1sma5926 926a 11 34.1 5.5 550 0.25 0.5 8.4 136 1sma5927 927a 12 31.2 6.5 550 0.25 0.5 9.1 125 1sma5928 928a 13 28.8 7.0 550 0.25 0.5 9.9 115 1sma5929 929a 15 25.0 9.0 600 0.25 0.5 11.4 100 1sma5930 930a 16 23.4 10.0 600 0.25 0.5 12.2 94 1sma5931 931a 18 20.8 12 650 0.25 0.5 13.7 83 1sma5932 932a 20 18.7 14 650 0.25 0.5 15.2 75 1sma5933 933a 22 17.0 17.5 650 0.25 0.5 16.7 68 1sma5934 934a 24 15.6 19 700 0.25 0.5 18.2 63 1sma5935 935a 27 13.9 23 700 0.25 0.5 20.6 56 1sma5936 936a 30 12.5 26 750 0.25 0.5 22.8 50 1sma5937 937a 33 11.4 33 800 0.25 0.5 25.1 45 1sma5938 938a 36 10.4 38 850 0.25 0.5 27.4 42 1sma5939 939a 39 9.6 45 900 0.25 0.5 29.7 38 1sma5940 940a 43 8.7 53 950 0.25 0.5 32.7 35 1sma5941 941a 47 8.0 67 1000 0.25 0.5 35.8 32 1sma5942 942a 51 7.3 70 1100 0.25 0.5 38.8 29 1sma5943 943a 56 6.7 86 1300 0.25 0.5 42.6 27 1sma5944 944a 62 6.0 100 1500 0.25 0.5 47.1 24 1sma5945 945a 68 5.5 120.0 1700 0.25 0.5 51.7 22 notes: 1: tolerance and voltage regulation designation - the type number listed indicates a tolerance of 5%. 2: vz limits are to be guaranteed at thermal equilibrium. zzk @ izk ir @ vr zener impedance leakage current
ratings and characteristic curves ( 1sma5926 thru 1sma5945) fig.1- steady state power derating fig.2- vz = 12 thru 68 volts fig.3- zener voltage - 14 to 68 volts t, temperature( c) o fig.4- effect of zener voltage v zener voltage (volts) z , p maximum power dissipation (watts) d , i zener current (ma) z , o temperature coefficient (mv/ c) vz , o z , dynamic impedance (ohms) z v zener voltage (volts) z , 0 0 25 50 75 100 125 150 0.8 1.6 2.4 3.2 4 t a t l 0 0.1 10 20 30 40 50 60 70 80 1 10 100 v zener voltage (volts) z , v@i zz1 10 10 100 100 i=1ma z(dc) 10 ma 20 ma i=0.1i z(ms) z(dc) 10 100 10 100 - 130 -
ratings and characteristic curves ( 1sma5926 thru 1sma5945) fig.5- capacitance curve fig.6- typical pulse rating curve fig.7- pulse waveform fig.8- pulse waveform c, capacitance (pf) p , peak power (kw) pk ippm, peak pulse current (%) breakdown voltage (volts) tp, pulse width (ms) t, time (ms) t, time (ms) measured @ zero bias measured @ v/2 z t=25c j o 10 100 10 100 1000 0.01 0.01 0.1 1 10 0.1 1 10 nonrepetitive, exponential pulse waveform, t = 25 c j o t=25c pw (i ) is defined as the point where the peak current decays to 50% of i a d o pp- 10 s peak value i ppm half value - i /2 pp 10/1000 s waveform as defined by r.e.a. t d 0 0 12 345 20 40 60 80 100 120 ippm, peak pulse current (%) t=8 s 0.5 i peak 0.9 i peak 0.1 i peak t 20 s 8/20 s waveform as defined by ansi c62.1 and iec 801-5, 0 0 0.02 0.04 0.06 0.08 0.1 20 40 60 80 100 120 - 131 -
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