0603 CHIP INDUCTORS Chip Inductors for Critical Applications ST312RAM ■ ■ ■ ■ Higher inductance values than ceramic 0603 inductors Heavier gauge wire for low DCR Ferrite construction for high current handling Inductance values from 15 nH to 10 µH Impedance typ (Ohms) Inductance2 Part number1 ±5% (nH) Q min3 100 MHz 500 MHz ST312RAM15NJRZ ST312RAM33NJRZ ST312RAM111JRZ ST312RAM121JRZ ST312RAM241JRZ ST312RAM271JRZ ST312RAM471JRZ ST312RAM561JRZ ST312RAM681JRZ ST312RAM821JRZ ST312RAM102JRZ ST312RAM222JRZ ST312RAM472JRZ ST312RAM103JRZ 15 @ 7.9 MHz 33 @ 7.9 MHz 110 @ 7.9 MHz 120 @ 7.9 MHz 240 @ 7.9 MHz 270 @ 7.9 MHz 470 @ 7.9 MHz 560 @ 7.9 MHz 680 @ 7.9 MHz 820 @ 7.9 MHz 1000 @ 7.9 MHz 2200 @ 7.9 MHz 4700 @ 7.9 MHz 10000 @ 2.5 MHz 10@ 7.9 MHz 10@ 7.9 MHz 12 @ 7.9 MHz 12 @ 7.9 MHz 12 @ 7.9 MHz 12 @ 7.9 MHz 12 @ 7.9 MHz 12 @ 7.9 MHz 12 @ 7.9 MHz 12 @ 7.9 MHz 13 @ 7.9 MHz 12 @ 2.5 MHz 12 @ 7.9 MHz 9 @ 2.5 MHz 10 19 70 76 140 173 306 371 420 507 663 5220 2100 1400 1. When ordering, please specify termination and testing codes: ST312RAM103JRZ Termination:R=RoHS compliant matte tin over nickel over silverplatinum-glass frit. Special order: Q = RoHS tin-silver-copper (95.5/4/0.5) over tin over nickel over silver-platinum-glass frit or P = non-RoHS tin-lead (63/37) over tin over nickel over silver-platinum-glass frit. Testing:Z=COTS H=Screening per Coilcraft CP-SA-10001 2. Inductance measured using a Coilcraft SMD-A fixture in an Agilent/ HP 4286A impedance analyzer or equivalent with Coilcraft-provided correlation pieces. 3. Q measured at the same frequency as inductance using an Agilent/ HP 4291A with an Agilent/HP 16197A test fixture or equivalents. 4. SRF measured using an Agilent/HP 8753ES network analyzer or equivalent and a Coilcraft SMD-D test fixture. 5. DCR measured on a Keithley 580 micro-ohmmeter or equivalent and a Coilcraft CCF1010 test fixture. 6. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. ® ImaxColor (A) code 2800 1840 980 920 720 600 460 400 420 260 320 65 45 30 1.7 1.7 1.4 1.4 0.68 0.68 0.61 0.53 0.53 0.53 0.40 0.40 0.40 0.40 0.023 0.028 0.060 0.089 0.12 0.22 0.37 0.49 0.46 0.58 0.84 1.10 1.50 4.50 Yellow Red Red Black Violet Brown Orange Blue Orange Green Black Red Yellow Gray Core material Ferrite Terminations Matte tin over nickel over silver-platinum-glass frit. Weight 4.3 – 5.7 mg Ambient temperature –40°C to +85°C with Irms current, +85°C to +100°C with derated current Storage temperature Component: –55°C to +100°C. Packaging: –55°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) +50 to +300 ppm/°C Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 85% relative humidity) Packaging 2000 per 7″ reel; Paper tape: 8 mm wide, 1.0 mm thick, 4 mm pocket spacing Specifications subject to change without notice. Please check our website for latest information. 1102 Silver Lake Road Cary IL 60013 © Coilcraft, Inc. 2012 42 90 350 410 810 1023 2253 3180 3620 3300 9823 129 220 150 min4 DCR max5 (MHz) (Ohms) SRF Document ST773-1 Revised 10/28/11 Phone 800-981-0363 Fax 847-639-1508 E-mail [email protected] Web www.coilcraft-cps.com 0603 CHIP INDUCTORS ST312RAM Series (0603) Typical L vs Frequency Typical Q vs Frequency 10000 22 20 4700 nH 16 2200 nH Inductance (nH) 680 nH 18 Q Factor 14 1000 nH 1000 680 nH 560 nH 470 nH 10 8 470 nH 2200 nH 6 270 nH 2 120 nH 100 10 0 1000 1 10 270 nH 560 nH 100 1000 Frequency (MHz) Frequency (MHz) Current Derating Typical Impedance vs Frequency 120 100000 110 4700 nH 1000 nH 680 nH 2200 nH 560 nH 470 nH 270 nH 100 1000 120 nH 100 10 90 80 70 60 50 40 25°C Percent of rated Irms 10000 Impedance (Ohms) 1000 nH 4700 nH 4 100 1 120 nH 12 30 20 10 1 0 1 10 100 10000 1000 C B overall D F A E terminal -40 -20 0 20 40 60 80 100 120 Ambient temperature (°C) Frequency (MHz) H Pick and place material I G J F I Terminal wraparound: approx 0.008/0,20 both ends Recommended Suggested LandPattern Pattern Land ABCD maxmaxmax ref E F G H IJ 0.0710.0440.0360.0150.0300.0130.0340.0400.0250.025inches 1,801,120,910,380,760,330,861,020,640,64 mm Note: Dimensions are before optional solder application. For maximum overall dimensions including solder, add 0.0025 in / 0,064 mm to B and 0.006 in / 0,15 mm to A and C. ® Specifications subject to change without notice. Please check our website for latest information. 1102 Silver Lake Road Cary IL 60013 © Coilcraft, Inc. 2012 Document ST733-2 Revised 10/28/11 Phone 800-981-0363 Fax 847-639-1508 E-mail [email protected] Web www.coilcraft-cps.com