Document 915-1 Current Sense Transformers CST4835 • • • • AEC-Q200 Grade 1 qualified (–40°C to +125°C ambient) Miniature SMT design, only 4.5 × 4.8 mm footprint 500 Vrms, one minute isolation (hipot) between windings Designed for use up to 1 MHz to sense continuous currents to 7 Amps Core material Ferrite Environmental RoHS compliant, halogen free Terminations RoHS compliant silver over nickel over phos bronze. Weight 115 – 122 mg Ambient temperature –40°C to +125°C Maximum part temperature +165°C (ambient + temp rise) Storage temperature Component: –40°C to +165°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 500/7″ reel; 2200/13″ reel; Plastic tape: 12 mm wide, 0.35 mm thick, 8 mm pocket spacing, 3.6 mm pocket depth PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf. DCR max (Ohms) Turns (N) Inductance2 Part number1 pri : sec min (µH) pri sec CST4835-020E_ 1 : 20 33 0.003 0.35 CST4835-030E_ 1 : 30 74 0.003 0.90 CST4835-040E_ 1 : 40 132 0.003 1.60 CST4835-050E_ 1 : 50 205 0.003 2.50 CST4835-060E_ 1 : 60 295 0.003 3.60 CST4835-070E_ 1 : 70 400 0.003 4.60 CST4835-100E_ 1 : 100 820 0.003 9.50 CST4835-125E_ 1 : 125 1280 0.003 13.0 CST4835-150E_ 1 : 150 1800 0.003 21.0 1. When ordering, please specify packaging code: 2. 3. 4. 5. CST4835-150EC Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic tape (500 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 (2200 parts per full reel). Inductance measured between secondary pins at 100 kHz, 0.1 Vrms, 0 Adc. Maximum volt-time product is for the secondary, based on 2000 Gauss. Primary current of 7 A causes less than 25°C temperature rise from 25°C ambient. Higher current causes a greater temperature rise (see Temperature Rise vs Current curve). Terminating resistance (RT) value is based on 1 Volt output with 7 Amps flowing through the primary. Varying terminating resistance increases or decreases output Voltage/Ampere according to the following equation: RT = Vout × Nsec / Iin. Frequency range (kHz) 83 – 1000 56 – 1000 42 – 1000 33 – 1000 28 – 1000 24 – 1000 17 – 1000 13 – 1000 11 – 1000 Volt-time product3 (Vµsec) 6.0 9.0 12.0 15.0 18.0 21.0 30.0 37.5 45.0 Sensed current Iin4 max (A) 7 7 7 7 7 7 7 7 7 Terminating resistance RT5 (Ohms) 2.9 4.3 5.7 7.1 8.6 10.0 14.3 17.9 21.4 6 Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. I in 4 2 Pri (1 turn) Sec (N turns) 3 1 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] RT Document 915-1 Vout Revised 04/25/16 © Coilcraft Inc. 2016 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 915-2 CST4835 Series SMT Current Sense Transformers Temperature Rise vs Current Temperature rise (from 25°C) 50 45 40 35 30 25 20 15 10 5 0 0 1 2 3 4 5 6 7 8 9 10 11 12 Current (A rms) Dimensions are in inches mm 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] Document 915-2 Revised 04/25/16 © Coilcraft Inc. 2016 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.