Document 131 Current Sensors – D18xx, CS1xxx These sensors function as the secondaries of a current transformer. The conductor carrying the current to be measured 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 encapsulated model (D18xx Series). Coilcraft Designer’s 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. Part Inductance1 DCR max number Turns (N) min (mH) (Ohms) FrequencyVolt-time Sensed Terminating range product2current Iin resistance RT3Color (kHz) (Vµsec) max (A) (Ohms) code D1869L D1870L D1871L CS1050L CS1100L CS1200L CS1750L 3 – 1000 2 – 1000 1 – 1000 3 – 1000 2 – 1000 1 – 1000 0.2 – 1000 50 100 200 50 100 200 750 5 20 80 5 20 80 1125 0.7 1.4 4.5 0.7 1.4 4.5 62.0 149 298 596 149 298 596 2235 35 35 35 35 35 35 35 1.4 2.9 5.7 1.4 2.9 5.7 21.4 Green Brown Red 1. Inductance is measured at 1 kHz, 0.05 Vrms. 2. Volt-time product is based on 2000 Gauss. 3. Terminating resistance (RT) value is based on 1 Volt output with 35 Amps flowing through the primary. Varying terminating resistance increases or decreases output Voltage/Ampere according to the following equation: RT = Vout × Nsec / Iin 4. Ambient temperature range –40°C to +85°C. 5. Electrical specifications at 25°C. D18xx Series 0.465 max 11,81 CS1xxx Series Date code 0.20 min 5,08 0.80 max 20,30 A B I in A 0.80 max 20,3 A 3 0.033 ±0.002 0,84 ±0,05 0.45 max 11,43 3 B 0.70 max 17,8 1+ B 3− RT Vout 0.20 min 5,08 Color code 0.34 max 8,64 Typical Circuit 0.375 max 9,53 0.75 max 19,05 3 0.125 max 3,175 Terminations: Tin-silver over copper Weight: 4.0 – 4.5 g 1 0.50 ±0.015 12,7 ±0,38 3 0.158/0.218 4,01/5,54 1 0.50 ±0.015 12,7 ±0,38 0.036/0.030 0,91/0,76 Terminations: Tin-silver over copper Weight: 5.3 – 5.8 g Leads 3 and A are in phase per orientation shown above. Document 131 Revised 06/09/15