specifcations subject to change without notice. please check our website for latest information. air core inductors for critical applications air core inductors document st107-1 revised 10/24/11 srf dcr l 2 percent q 3 min 4 max 5 imax weight part number 1 turns (nh) tol min (ghz) (mohm) (a) (mg) st439rat2n5klz 1 2.5 10 145 12.5 1.1 4 31 st439rat5n0_lz 2 5.0 5,2 140 6.5 1.8 4 42 st439rat8n0_lz 3 8.0 5,2 140 5.0 2.6 4 52 st439rat13n_lz 4 12.5 5,2 137 3.3 3.4 4 65 st439rat19n_lz 5 18.5 5,2 132 2.5 3.9 4 78 st470rat18n_lz 6 17.5 5,2 100 2.2 4.5 4 100 st470rat22n_lz 7 22.0 5,2 102 2.1 5.2 4 110 st470rat28n_lz 8 28.0 5,2 105 1.8 6.0 4 118 st470rat36n_lz 9 35.5 5,2 112 1.5 6.8 4 133 st470rat43n_lz 10 43.0 5,2 106 1.2 7.9 4 147 1. when ordering, please specify tolerance, termination and testing codes: st470rat43n glz 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 fxture and correlation. 3. q measured at 150 mhz on an agilent/hp 4291a or equivalent with a 16193a test fxture or equivalent. 4. srf measured on an agilent/hp 8753es network analyzer or equivalent with a coilcraft ccf1268 test fxture. parts with srf >5 ghz are verifed to >5 ghz in screening 5. dcr measured on a keithley 580 micro-ohmmeter or equivalent. 6. electrical specifcations at 25c. refer to doc 362 soldering surface mount components before soldering. terminations rohs compliant tin-silver over copper. other termina - tions available at additional cost. ambient temperature C40c to +125c with imax current, +125c to +140c with derated current storage temperature component: C40c to +140c. packaging: C40c to +80c resistance to soldering heat max three 40 second refows at +260c, parts cooled to room temperature between cycles temperature coeffcient of inductance (tcl) +5 to +70 ppm/c moisture sensitivity level (msl) 1 (unlimited foor life at <30c / 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 dimensions are in inches mm st439rat st470rat small air core inductors feature high q and tight tolerances acrylic jacket provides a fat top for pick and place solder coated leads ensure reliable soldering 1102 silv er lak e road car y il 60013 phone fa x 800-981-0363 847-639-1508 e-mail we b cps@coilcraft.com www .coilcraft-cps .com ? ? coilcraft, inc. 2011
specifcations subject to change without notice. please check our website for latest information. air core inductors document st107-2 revised 10/24/11 st439rat / st470rat air core inductors typical current derating l vs frequency C st439rat l vs frequency C st470rat q vs frequency C st439rat q vs frequency C st470rat 25 20 15 10 5 0 60 55 50 45 40 35 30 25 20 15 10 100 100 200 200 400 400 600 600 1000 1000 inductance (nh) inductance (nh) frequency (mhz) frequency (mhz) 17.5 nh 22.0 nh 28.0 nh 35.5 nh 43.0 nh 2.5 nh 5.0 nh 8.0 nh 12.5 nh 18.5 nh 220 210 200 190 180 170 160 150 140 130 135 130 125 120 115 110 105 100 95 90 100 100 200 200 400 400 600 600 1000 1000 q factor q factor frequency (mhz) frequency (mhz) 28.0 nh 35.5 nh 43.0 nh 22.0 nh 17.5 nh 18.5 nh 12.5 nh 8.0 nh 5.0 nh 2.5 nh -40 -55 -20 02 04 06 08 0 100 160 140 120 ambient temperature (c) pe r cent of rated rms i 120 110 100 90 80 70 60 50 40 30 20 10 0 25c 1102 silv er lak e road car y il 60013 phone fa x 800-981-0363 847-639-1508 e-mail we b cps@coilcraft.com www .coilcraft-cps .com ? ? coilcraft, inc. 2011
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