Document 644-1 SMT Power Inductors - SER2900 Series • Same electrical specifications as Coilcraft’s SER2800 • Extremely low DCR; Current handling to >100 Amps • Third mounting pad for greater stability and board adhesion Core material Ferrite Terminations Leads: RoHS compliant tin-silver over copper. Base pad: RoHS compliant gold over nickel over phos bronze. Other terminations available at additional cost. Weight SER2915L – 28.5 g; SER2915H – 29.7 g; SER2918H – 35.7 g Ambient temperature –40°C to +85°C with Irms current, +85°C to +125°C with derated current Storage temperature Component: –40°C to +125°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 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 25 pieces per tray PCB washing Only pure water or alcohol recommended DCR3 Inductance2 SRF (mOhms) ±10% typ4 Part number1 (µH) nom max (MHz) SER2915L-152KL 1.5 1.50 1.65 60 SER2915H-222KL 2.2 1.86 2.05 40 SER2915L-222KL 2.2 1.50 1.65 50 SER2918H-332KL 3.3 2.60 2.86 40 SER2915H-332KL 3.3 1.86 2.05 30 SER2915L-332KL 3.3 1.50 1.65 40 SER2918H-472KL 4.7 2.60 2.86 30 SER2915H-472KL 4.7 1.86 2.05 25 SER2915L-472KL 4.7 1.50 1.65 30 SER2918H-682KL 6.8 2.60 2.86 25 SER2915H-682KL 6.8 1.86 2.05 20 SER2915L-682KL 6.8 1.50 1.65 25 SER2918H-103KL 10 2.60 2.86 20 SER2915H-103KL 10 1.86 2.05 15 SER2915L-103KL 10 1.50 1.65 20 SER2918H-153KL 15 2.60 2.86 16 SER2915H-153KL 15 1.86 2.05 12 SER2915L-153KL 15 1.50 1.65 15 SER2918H-223KL 22 2.60 2.86 15 SER2915H-223KL 22 1.86 2.05 10 SER2915L-223KL 22 1.50 1.65 10 SER2918H-333KL 33 2.60 2.86 10 SER2915H-333KL 33 1.86 2.05 8 SER2915L-333KL 33 1.50 1.65 7 10% drop 100 100 82.0 91.0 62.0 48.0 59.0 42.0 33.0 42.0 30.0 22.0 28.0 18.0 13.0 18.0 11.5 7.5 12.0 7.0 4.5 7.0 4.0 2.0 Isat (A)5 Irms (A)6 20% 30% 20°C 40°C drop drop rise rise >100 >100 20 30 >100 >100 20 30 84.0 84.8 20 30 92.5 93.6 20 28 66.9 68.4 20 30 54.0 57.0 20 30 61.2 62.4 20 28 48.0 50.1 20 30 36.9 39.0 20 30 45.0 45.9 20 28 34.5 36.2 20 30 26.0 27.8 20 30 31.2 32.1 20 28 30 21.5 23.4 20 16.2 17.6 20 30 21.2 21.9 20 28 14.0 15.2 20 30 9.8 11.0 20 30 14.0 15.0 20 28 8.6 9.6 20 30 6.0 6.8 20 30 8.7 9.6 20 28 5.1 5.9 20 30 2.6 3.3 20 30 1. When ordering, specify termination code: SER2915-333KL 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). 2. Inductance measured at 500 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4284A LCR meter or equivalent. 3. DCR measured on a Keithley 580 microohmmeter or equivalent. 4. SRF measured using an Agilent/HP 8753D network analyzer and a Coilcraft SMD-D test fixture. 5. Peak dc current at which the inductance drops the specified amount from its value without current. When Isat rating is less than Irms, Isat is the more critical specification. 6. Current that causes the specified temperature rise from 25°C ambient. When Irms is greater than Isat, Isat is the more critical specification, and Irms is shown in gray type. See Temperature Rise vs Current curve on next page. 7. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 Document 644-1 Revised 11/30/09 Document 644-2 SMT Power Inductors - SER2900 Series 1.10 max 27,9 0.250 6,35 0.200 5,08 SER29XXX COILCRAFT XX 0.78 max 19,7 Pad is for mounting stability only. Do not connect to ground or other circuits. 0.208 5,28 CL 1.100 max 27,94 0.455 11,56 CL 0.270 6,9 0.220 5,59 0.210 5,33 0.150 3,8 0.261 ±0.020 6,63 ±0,51 0.095 2,41 0.095 2,41 Recommended Land Pattern Height (See table) Maximum height 0.605 / 15,36 0.605 / 15,36 0.700 / 17,78 SER2915L SER2915H SER2918H Dimensions are in inches mm Temperature Rise vs Current Current Derating 80 120 110 70 100 60 50 40 30 20 10 0 0 10 20 30 Current (A rms) 40 50 60 90 80 70 60 50 40 30 20 25°C Percent of rated current Temperature rise (from 25°C) 0.006/0,152 0.150 min 3,8 Isat Irms 10 0 -40 -20 0 20 Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 40 60 80 100 120 140 Ambient temperature (°C) Document 644-2 Revised 11/30/09 Document 644-3 SMT Power Inductors - SER2900 Series L vs Frequency L vs Current 100 100 33 µH 22 µH Inductance (µH) Inductance (µH) 33 µH 15 µH 10 µH 10 6.8 µH 4.7 µH 3.3 µH 22 µH 15 µH 10 µH 10 6.8 µH 4.7 µH 3.3 µH 2.2 µH 2.2 µH 1.5 µH 1 1.5 µH SER2915L 0.1 SER2915L 1 10 1 100 0.1 Current (A) 100 Frequency (MHz) 100 100 33 µH 33 µH 22 µH Inductance (µH) Inductance (µH) 10 1 15 µH 10 µH 10 6.8 µH 4.7 µH 3.3 µH 22 µH 10 15 µH 10 µH 6.8 µH 4.7 µH 3.3 µH 1 2.2 µH 2.2 µH 1 SER2915H 0.1 0.1 10 1 100 SER2915H 0.1 Current (A) 1 100 100 100 33 µH Inductance (µH) 33 µH Inductance (µH) 10 Frequency (MHz) 22 µH 15 µH 10 µH 10 6.8 µH 4.7 µH 22 µH 10 15 µH 10 µH 6.8 µH 4.7 µH 3.3 µH 1 3.3 µH 1 SER2918H 0.1 0.1 10 1 100 SER2918H 0.1 Current (A) 10 100 Frequency (MHz) Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 1 Document 644-3 Revised 11/30/09 Document 644-4 SMT Power Inductors - SER2900 Series ESR vs Frequency SER2915L 1750 1250 1000 750 6.8 4.7 µH 3.3 µH 2.2 µH µH 1.5 µH 1500 33 µH 22 15 µH µH 10 µH Equivalent Series Resistance (Ohms) 2000 500 250 0 0.1 1 10 100 SER2915H 1750 1500 1250 1000 750 10 µH 6.8 µH 4.7 µH 3.3 µ 2.2 H µH 33 µH 22 µH 2000 15 µH Equivalent Series Resistance (Ohms) Frequency (MHz) 500 250 0 0.1 1 10 100 SER2918H 1750 15 µH 10 µ H 6.8 µ H 3.3 µH 4.7 µH 33 µH 2000 22 µH Equivalent Series Resistance (Ohms) Frequency (MHz) 1500 1250 1000 750 500 250 0 0.1 1 10 100 Frequency (MHz) Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 Document 644-4 Revised 11/30/09