document 131 document 131 revised 06/09/15 current sensors C d18 xx , cs1 xxx these sensors function as the secondaries of a current transformer. the conductor carrying the current to be mea - sured is the one turn primary. voltage per ampere can be adjusted by varying the terminating resistor (see note 3). applications include sensing branch circuit overload, switcher feedback, and detecting load drop or shutdown. they come in a molded version (cs1xxx series) or en - capsulated model (d18xx series). coilcraft designers kit p403 contains samples of the cs1050, cs1100 and cs1200 sensors, current transformer versions with equivalent ratings, plus two 50/60 hz current sensors. to order, contact coilcraft or visit http://order.coilcraft.com. frequency volt-time sensed terminating part inductance 1 dcr max range product 2 current i in resistance r t 3 color number turns (n) min (mh) (ohms) (khz) (vsec) max (a) (ohms) code d1869l 50 5 0.7 3 C 1000 149 35 1.4 green d1870l 100 20 1.4 2 C 1000 298 35 2.9 brown d1871l 200 80 4.5 1 C 1000 596 35 5.7 red cs1050l 50 5 0.7 3 C 1000 149 35 1.4 CS1100L 100 20 1.4 2 C 1000 298 35 2.9 cs1200l 200 80 4.5 1 C 1000 596 35 5.7 cs1750l 750 1125 62.0 0.2 C 1000 2235 35 21.4 d18xx series leads 3 and a are in phase per orientation shown above. 0.75 19,05 0.20 5,08 0.033 0.002 0,84 0,05 0.50 0.015 12,7 0,38 0.80 20,30 max min 1 3 3 date code color code max 0.465 11,81 0.125 3,175 0.45 11,43 0.34 8,64 ma x a max max max b 0.80 20,3 0.20 5,08 max min 0.70 17,8 max 0.50 0.015 12,7 0,38 1 3 3 a b 0.158/0.218 5,54 4,01/ 0.036/0.030 0,91/0,76 0.375 9,53 max cs1xxx series 1 + ab i in r t 3 ? v out terminations: tin-silver over copper weight: 4.0 C 4.5 g typical circuit terminations: tin-silver over copper weight: 5.3 C 5.8 g 1. inductance is measured at 1 khz, 0.05 vrms. 2. volt-time product is based on 2000 gauss. 3. terminating resistance (r t ) value is based on 1 volt output with 35 amps fowing through the primary. varying terminating resistance increases or decreases output voltage/ampere according to the following equation: r t = v out n sec / i in 4. ambient temperature range C40c to +85c. 5. electrical specifcations at 25c.
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