AIR CORE INDUCTORS Air Core Inductors for Critical Applications ST439RAT ST470RAT ■Small air core inductors feature high Q and tight tolerances ■Acrylic jacket provides a flat top for pick and place ■Solder coated leads ensure reliable soldering Terminations RoHS compliant tin-silver over copper. Other terminations available at additional cost. Ambient temperature –40°C to +125°C with Imax current, +125°C to +140°C with derated current Storage temperature Component: –40°C to +140°C. 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 Temperature Coefficient of Inductance (TCL) +5 to +70 ppm/°C Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 85% relative humidity) Packaging ST439RAT: 700/7″ reel Plastic tape: 12 mm wide, 0.32 mm thick, 8 mm pocket spacing, 3.3 mm pocket depth ST470RAT: 500/7″ reel Plastic tape: 16 mm wide, 0.28 mm thick, 8 mm pocket spacing, 3.4 mm pocket depth SRFDCR L2 Percent Q3 min4 max5 Imax Weight Part number1 Turns(nH) tol min (GHz)(mOhm) (A) (mg) ST439RAT2N5KLZ 12.510 14512.5 1.1 4 31 ST439RAT5N0_LZ 25.05,2 1406.5 1.8 4 42 ST439RAT8N0_LZ 38.05,2 1405.0 2.6 4 52 ST439RAT13N_LZ 412.5 5,2 1373.3 3.4 4 65 ST439RAT19N_LZ 518.5 5,2 1322.5 3.9 4 78 ST470RAT18N_LZ 617.5 5,2 1002.2 4.5 4 100 ST470RAT22N_LZ 722.0 5,2 1022.1 5.2 4 110 ST470RAT28N_LZ 828.0 5,2 1051.8 6.0 4 118 ST470RAT36N_LZ 935.5 5,2 1121.5 6.8 4 133 ST470RAT43N_LZ 1043.0 5,2 1061.2 7.9 4 147 1. When ordering, please specify tolerance, termination and testing codes: ST470RAT43NGLZ Tolerance: G=2% J = 5% Termination:L= RoHS compliant tin-silver over copper. Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37). Testing:Z=COTS H= Screening per Coilcraft CP-SA-10001 2. Inductance measured at 150 MHz on an Agilent/HP 4286A or equivalent with a Coilcraft SMD-A test fixture and correlation. 3. Q measured at 150 MHz on an Agilent/HP 4291A or equivalent with a 16193A test fixture or equivalent. 4. SRF measured on an Agilent/HP 8753ES network analyzer or equivalent with a Coilcraft CCF1268 test fixture. Parts with SRF >5 GHz are verified to >5 GHz in screening 5. DCR measured on a Keithley 580 Micro-Ohmmeter or equivalent. 6. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. ® inches mm Specifications subject to change without notice. Please check our website for latest information. 1102 Silver Lake Road Cary IL 60013 © Coilcraft, Inc. 2011 Dimensions are in Document ST107-1 Revised 10/24/11 Phone 800-981-0363 Fax 847-639-1508 E-mail [email protected] Web www.coilcraft-cps.com AIR CORE INDUCTORS ST439RAT / ST470RAT Air Core Inductors L vs Frequency – ST439RAT L vs Frequency – ST470RAT 25 60 43.0 nH 55 50 18.5 nH Inductance (nH) Inductance (nH) 20 15 12.5 nH 10 8.0 nH 5.0 nH 5 100 35.5 nH 40 35 28.0 nH 30 22.0 nH 25 20 2.5 nH 0 45 17.5 nH 15 200 400 600 10 1000 100 Frequency (MHz) Q vs Frequency – ST439RAT 600 1000 135 210 130 2.5 nH 125 200 17.5 nH 120 5.0 nH 180 170 8.0 nH 160 Q factor 190 Q factor 400 Q vs Frequency – ST470RAT 220 22.0 nH 115 28.0 nH 35.5 nH 110 105 12.5 nH 43.0 nH 100 150 140 130 200 Frequency (MHz) 95 18.5 nH 100 200 400 600 1000 90 100 Frequency (MHz) 200 400 600 1000 Frequency (MHz) Typical Current Derating 120 110 90 80 70 60 50 40 25°C Percent of rated Irms 100 30 20 10 0 -55 -40 -20 0 20 40 60 80 100 120 140 160 Ambient temperature (°C) ® Specifications subject to change without notice. Please check our website for latest information. 1102 Silver Lake Road Cary IL 60013 © Coilcraft, Inc. 2011 Document ST107-2 Revised 10/24/11 Phone 800-981-0363 Fax 847-639-1508 E-mail [email protected] Web www.coilcraft-cps.com