Document 385-1 SMT Current Sensors – CST Series • For use from 50 kHz to nearly 1 MHz • Two different pinouts to meet the requirements of different applications. • Low primary DC resistance; 500 V isolation 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 –40°C to +125°C Storage temperature Component: –40°C to +125°C. Tape and reel packaging: –40°C to +80°C Resistance to soldering heat Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 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 250/7″reel;1000/13″ reel; Plastic tape: 16 mm wide, 0.35 mm thick, 12 mm pocket spacing, 5.6 mm pocket depth PCB washing Only pure water or alcohol recommended Sensed Terminating Volt-time Part number1 Turns (N) Inductance2 DCR max (Ohms) current3 resistance RT4 product5 CST1 CST2 pri : sec min (µH) Primary Secondary Iin (A) (Ohms) (V-µsec) CST1-020L_ CST2-020L_ 1 : 20 81 0.0007 0.400 10 2.0 16 CST1-030L_ CST2-030L_ 1 : 30 180 0.0007 0.870 10 3.0 24 CST1-040L_ CST2-040L_ 1 : 40 320 0.0007 1.14 10 4.0 32 CST1-050L_ CST2-050L_ 1 : 50 500 0.0007 1.50 10 5.0 41 CST1-060L_ CST2-060L_ 1 : 60 730 0.0007 1.98 10 6.0 49 CST1-070L_ CST2-070L_ 1 : 70 980 0.0007 4.75 10 7.0 57 CST1-100L_ CST2-100L_ 1 : 100 2000 0.0007 5.50 10 10.0 81 CST1-125L_ CST2-125L_ 1 : 125 3000 0.0007 6.50 10 12.5 101 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 tin-silver over 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); nonRoHS tinlead 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. Primary current of 10 A causes approximately 25°C temperature rise from 25°C ambient. Higher current causes a greater temperature rise (see Temperature Rise vs Current curve). 4. Terminating resistance (RT) 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: RT (Ohms) = Vout × Nsec / Iin. 5. Maximum volt-time product for the secondary. 6. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Color dot Red Orange Yellow Green Blue Violet Gray Black Typical Circuits CST1 I in 8 6 Pri (1 turn) Sec (N turns) 7 4 8 1 Pri (1 turn) Sec (N turns) 7 3 RT Vout RT Vout CST2 I in [email protected] subject to change without notice. US +1-847-639-6400 Please check [email protected] our website for latest information. UK +44-1236-730595 Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 385-1 Revised 11/17/11 © Coilcraft Inc. 2013 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 Sensors Temperature rise (from 25°C) Temperature Rise vs Current Pinouts 80 CST1 CST2 70 8 7 60 3 4 3 4 1 6 1 6 50 40 30 20 10 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 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] 0.063 1,6 0.051 1,3 Document 385-2 0.051 1,3 Revised 11/17/11 © Coilcraft Inc. 2013 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.