Document 385-1 Current Sense Transformers CST1, CST2 * * * * * For use up to 1 MHz AEC-Q200 Grade 1 qualified (-40C to +125C ambient) Two pinouts to meet the requirements of different applications. Low primary DC resistance 500 Vrms, one minute isolation (hipot) between windings. Designer's Kit C389 contains 2 each of each part Core material Ferrite Terminations See Note 1. Weight 0.4 g Ambient temperature -40C to +125C Maximum part temperature 165C (ambient + temp rise) Storage temperature Component: -40C to +165C. Tape and reel packaging: -40C to +80C Resistance to soldering heat Max three 40 second reflows at +260C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / 85% relative humidity) Failures in Time (FIT) / Mean Time Between Failures (MTBF) 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 Packaging 250/7reel;1000/13 reel; Plastic tape: 16 mm wide, 0.35 mm thick, 12 mm pocket spacing, 5.6 mm pocket depth PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf. Part number1 CST1 CST2 CST1-020L_ CST2-020L_ CST1-030L_ CST2-030L_ CST1-040L_ CST2-040L_ CST1-050L_ CST2-050L_ CST1-060L_ CST2-060L_ CST1-070L_ CST2-070L_ CST1-100L_ CST2-100L_ CST1-125L_ CST2-125L_ Turns DCR (Ohms) Frequency (N) Inductance2 Pri Sec range pri : sec min (H) ref max (kHz) 1 : 20 81 0.0007 0.400 46 - 1000 1 : 30 180 0.0007 0.870 31 - 1000 1 : 40 320 0.0007 1.14 23 - 1000 1 : 50 500 0.0007 1.50 19 - 1000 1 : 60 730 0.0007 1.98 15 - 1000 1 : 70 980 0.0007 4.75 13 - 1000 1 : 100 2000 0.0007 5.50 9 - 1000 1 : 125 3000 0.0007 6.50 7 - 1000 1. When ordering, please specify termination and packaging codes: CSTX-125LC Termination: L = RoHS compliant tin-silver over tin over nickel over phos bronze (pins 1 - 6); RoHS compliant matte tin over nickel over copper (pins 7 - 8) Special order: S = non-RoHS tin-lead (63/37) over tin over nickel over phos bronze (pins 1 - 6); non-RoHS tin-lead over gold over nickel over copper (pins 7 - 8). 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. Maximum volt-time product for the secondary, based on 2000 gauss. 4. Primary current of 20 A causes approximately 35C temperature rise from 25C ambient. Higher current causes a greater temperature rise (see Temperature Rise vs Current curve). 5. Terminating resistance (RT) value is based on 1 Volt output with 20 Amps flowing through the primary. Varying terminating resistance increases or decreases output Voltage/Ampere according to the following equation: RT (Ohms) = Vout x Nsec / Iin. 6. Electrical specifications at 25C. Refer to Doc 362 "Soldering Surface Mount Components" before soldering. Volt-time Sensed Terminating product3 current Iin4 resistance RT5 Color (V-sec) max (A) (Ohms) dot 10.8 20 1.0 Red 16.2 20 1.5 Orange 21.6 20 2.0 Yellow 27.0 20 2.5 Green 32.4 20 3.0 Blue 37.8 20 3.5 Violet 54.0 20 5.0 Gray 67.5 20 6.3 Black Typical Circuits CST1 8 I in Pri (1 turn) 6 Sec I (N turns) out + RT Vout 7 4 - 8 1 + CST2 I in Pri (1 turn) 7 Specificationssales@coilcraft.com subject to change without notice. US +1-847-639-6400 Please check sales@coilcraft-europe.com our website for latest information. UK +44-1236-730595 Taiwan +886-2-2264 3646 sales@coilcraft.com.tw China +86-21-6218 8074 sales@coilcraft.com.cn Singapore + 65-6484 8412 sales@coilcraft.com.sg Sec I (N turns) out 3 Document 385-1 RT Vout - Revised 04/22/17 (c) Coilcraft Inc. 2017 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 385-2 CST Series Current Sense Transformers Temperature rise (from 25C) Temperature Rise vs Current Pinouts 40 CST1 CST2 35 8 7 30 3 4 3 4 1 6 1 6 25 20 15 10 5 0 0 2 4 6 8 10 12 14 16 18 7 8 Bottom View Bottom View 20 Current (A rms) Dimensions 0.235 max 5,97 Color dot by pin 1 indicates part number 0.245 max 6,22 0.209 max 5,3 0.315 max 8,0 0.004 / 0,10 0.320 max 8,13 Recommended Land Pattern 0.118 3,0 0.023 0.008 0,6 0,2 0.073 0.008 1,85 0,2 0.098 2,5 0.106 2,7 0.073 1,85 0.047 1,2 0.079 0.008 2,0 0,2 US +1-847-639-6400 sales@coilcraft.com UK +44-1236-730595 sales@coilcraft-europe.com Taiwan +886-2-2264 3646 sales@coilcraft.com.tw China +86-21-6218 8074 sales@coilcraft.com.cn Singapore + 65-6484 8412 sales@coilcraft.com.sg 0.063 1,6 0.051 1,3 Document 385-2 0.051 1,3 Revised 04/22/17 (c) Coilcraft Inc. 2017 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Coilcraft: CST2-030LC CST2-125LB CST2-070LB CST1-125LC CST1-070LB CST2-040LC CST1-060LB CST2-040LB CST2-020LB CST1-020LC CST1-050LC CST1-030LB CST1-040LC CST1-040LB CST1-100LC CST2-070LC CST2-060LB CST1-100LB CST2-100LB CST2-050LC CST1-030LC CST1-050LB CST2-060LC CST2-125LC CST1-060LC CST1-020LB CST1-070LC CST2-030LB CST2-020LC CST2-050LB CST2-100LC CST1-125LB