? coilcraft, inc. 2010 specifications subject to change without notice. please check our website for latest information. smt current sensors C cst series document 385-1 document 385-1 revised 08/19/10 sensed term inating volt-time part number 1 turns (n) inductance 2 dcr max (ohms) current 3 resistance r t 4 product 5 color cst1 cst2 pri : sec min (h) pri mary secondary i i i i i in (a) (ohms) (v-sec) dot cst1-020l_ cst2-020l_ 1 : 20 81 0.0007 0.400 10 2.0 16 red cst1-030l_ cst2-030l_ 1 : 30 180 0.0007 0.870 10 3.0 24 orange cst1-040l_ cst2-040l_ 1 : 40 320 0.0007 1.14 10 4.0 32 yellow cst1-050l_ cst2-050l_ 1 : 50 500 0.0007 1.50 10 5.0 41 green cst1-060l_ cst2-060l_ 1 : 60 730 0.0007 1.98 10 6.0 49 blue cst1-070l_ cst2-070l_ 1 : 70 980 0.0007 4.75 10 7.0 57 violet cst1-100l_ cst2-100l_ 1 : 100 2000 0.0007 5.50 10 10.0 81 gray cst1-125l_ cst2-125l_ 1 : 125 3000 0.0007 6.50 10 12.5 101 black 8 sec (n turns) pri (1 turn) 7 6 4 r t v out i in the cst surface mount current sens ing transformers are designed for use from 50 khz to nearly 1 mhz to sense continuous currents to 10 amps and greater. the cst1 and cst2 differ in pinout numbering and layout in order to meet the requirements of different applications. these transformers feature extremely low primary dc resistance and 500 v isolation between windings. they are available in eight different turns ratios to meet a wide variety of requirements. they are ideal for use in switching power supply applications. coilcraft designer?s kit c389 contains samples of each of the standard parts shown. to order, contact coilcraft or visit http://order.coilcraft.com . 1. when ordering, please specify termination and packaging codes: cstx-125 lc termination: l = rohs compliant matte tin over nickel over phos bronze special order: t = rohs tin-silver-copper (95.5/4/0.5) or s = non-rohs tin-lead (63/37). packaging: c =7 machine-ready reel. eia-481 embossed plastic tape (250 parts per full reel). b = less than full reel. in tape, but not machine ready. to have a leader and trailer added ($25 charge), use code letter c instead. d =13 machine-ready reel. eia-481 embossed plastic tape (1000 parts per full reel). 2. inductance measured between secondary pins at 100 khz, 0.1 vrms. 3. primary current of 10 a causes approximately 25c temperature rise above 25c ambient. higher current causes a greater temperature rise (see temperature rise vs current curve). 4. terminating resistance (r t ) value is based on 1 volt output with 10 amps flowing through the primary. varying terminating resistance increases or decreases output voltage/ampere according to the following equation: r t (ohms) = v out n sec / i in. 5. maximum volt-time product for the secondary. 6. storage and operating temperature range -40c to +125c. 7. electrical specifications at 25c. typical circuits cst1 1 3 8 sec (n turns) pri (1 turn) 7 r t v out i in cst2
? coilcraft, inc. 2010 cst series current sensors specifications subject to change without notice. please check our website for latest information. 0.079 0.008 2,0 0,2 0.073 0.008 1,85 0,2 0.023 0.008 0,6 0,2 0.320 8,13 color dot by pin 1 indicates part number max 0.004 / 0,10 0.047 1,2 0.118 3,0 0.051 1,3 0.051 1,3 0.063 1,6 0.098 2,5 0.106 2,7 0.073 1,85 recommended land pattern 0.315 8,0 0.230 5,84 0.240 6,10 0.209 5,3 max max dimensions document 385-2 document 385-2 revised 08/19/10 weight: 0.4 g tape and reel: 250/7 reel; 1000/13 reel 16 mm tape width for packaging data see tape and reel specifications section. 80 70 60 50 40 30 20 0 10 temperature rise (from 25c) current (a rms) 4 2 08 612 10 16 18 14 20 temperature rise vs current pinouts 8 7 3 4 1 6 7 8 3 4 1 6 cst1 bottom view bottom view cst2
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