& *R AE oH C- S C Q2 O 00 MP QU LI A L A NT IF IE D 101 Features Applications Multiple applications: parallel, series, Automotive systems: dual-inductor and transformer Magnetically shielded, low radiation Inductance range: 0.47 to 4000 H Rated current up to 17.9 A AEC-Q200 qualified RoHS compliant* and halogen free** - Driver assistant - Entertainment - Information - Lighting DC/DC converters Power supplies SEPIC - DC/DC converters SRF1280A Series - Dual-Winding Shielded Power Inductors Electrical Specifications @ 25 C General Specifications Parallel Rating Inductance Bourns @ 100 KHz L (H) Part No. SRF1280A-R47Y 0.47 SRF1280A-1R0Y 1.0 SRF1280A-1R5Y 1.5 SRF1280A-2R2Y 2.2 SRF1280A-3R3Y 3.3 SRF1280A-4R7Y 4.7 SRF1280A-6R8Y 6.8 SRF1280A-8R2Y 8.2 SRF1280A-100M 10 SRF1280A-150M 15 SRF1280A-220M 22 SRF1280A-330M 33 SRF1280A-470M 47 SRF1280A-680M 68 SRF1280A-820M 82 SRF1280A-101M 100 SRF1280A-151M 150 SRF1280A-221M 220 SRF1280A-331M 330 SRF1280A-471M 470 SRF1280A-681M 680 SRF1280A-821M 820 SRF1280A-102M 1000 Tol. (%) 30 30 30 30 30 30 30 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 DCR () Max. 0.0055 0.0067 0.0076 0.0092 0.011 0.0135 0.0183 0.0191 0.0241 0.0333 0.0503 0.0664 0.0898 0.123 0.153 0.175 0.261 0.343 0.54 0.865 1.296 1.632 1.992 Series Rating Irms (A) 17.9 15.5 13.5 12.5 10.4 8.25 7.34 6.32 6.04 5.03 4 3.23 2.95 2.44 2.09 1.96 1.59 1.29 1.04 0.85 0.76 0.65 0.61 Isat (A) 56 40 31.1 25.5 21.5 16.5 13.3 12.2 11.2 9.66 7.57 6.22 5.28 4.44 4.06 3.64 3.01 2.43 2.01 1.68 1.39 1.27 1.14 Inductance @ 100 KHz L (H) 1.88 4 6 8.8 13.2 18.8 27.2 32.8 40 60 88 132 188 272 328 400 600 880 1320 1880 2720 3280 4000 Tol. (%) 30 30 30 30 30 30 30 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 DCR () Max. 0.0216 0.026 0.0306 0.0338 0.04 0.05 0.0656 0.0714 0.0921 0.129 0.192 0.265 0.353 0.469 0.578 0.701 1.013 1.38 2.172 3.3 4.888 5.896 7.202 Irms (A) 8.94 7.74 6.77 6.23 5.23 4.13 3.67 3.16 3.02 2.51 2 1.61 1.47 1.22 1.04 0.98 0.796 0.645 0.522 0.427 0.38 0.325 0.307 Isat (A) 28 20 15.6 12.7 10.8 8.24 6.67 6.09 5.6 4.83 3.78 3.11 2.64 2.22 2.03 1.82 1.51 1.22 1.01 0.838 0.697 0.633 0.571 Test Voltage ..................................0.25 V Operating Temperature ................................-40 C to +125 C (Temperature rise included) Storage Temperature ................................-40 C to +125 C Resistance to Solder Heat ............................. +245 C for 10 sec. Temperature Rise .......................40 C typ. at rated Irms Inductance drop ...................30 % at Isat Materials Core ..............................................Ferrite Wire ............................Enameled copper Terminal Finish ...................................Sn Packaging .................... 400 pcs. per reel Product Dimensions 12.50 MAX. (.492) 12.50 (.492) MAX. Electrical Schematic 1 2 N1 1 N2 3 2 N1 4 1 N2 3 2 N1 4 4 3 PARALLEL 8.00 MAX. (.315) N2 SERIES 5.00 0.3 (.197 .012) 5.00 0.3 (.197 .012) Recommended Layout 4.50 (.204) 2.15 (.085) 2 4 3 4.50 (.204) 2.15 (.085) 2 2 1 1 DIMENSIONS: 1 MM (INCHES) 1.80 0.2 (.071 .008) 13.00 (.512) 13.00 (.512) DIMENSIONS: 3 4 1.28 (.050) DUAL INDUCTOR MODE 3 MM (INCHES) 4 How to Order 1.28 (.050) SRF1280A - 100M SERIES MODE Model * RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. ** Bourns follows the prevailing definition of "halogen free" in the industry. Bourns considers a product to be "halogen free" if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less. Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. Value Code (see table) SRF1280A Series - Dual-Winding Shielded Power Inductors Inductance vs. IDC SRF1280A-470M L @ 25 C 50.0 SRF1280A-681M L @ 25 C L @ 125 C SRF1280A-102M L @ 125 C L @ 25 C 800.0 1200.0 600.0 900.0 L @ 125 C 20.0 L (H) 30.0 L (H) L (H) 40.0 400.0 200.0 10.0 0.0 0.0 1.1 2.2 3.3 300.0 0.0 0.0 4.4 600.0 0.3 0.6 0.9 0.0 0.0 1.2 0.2 IDC (A) IDC (A) 0.4 0.6 0.8 1.0 0.80 1.00 IDC (A) Temperature Rise vs. IDC SRF1280A-470M 100.0 SRF1280A-102M T @ 25 C T @ 25 C 100.0 100.0 80.0 80.0 60.0 60.0 60.0 40.0 T (C) 80.0 T (C) T (C) SRF1280A-681M T @ 25 C 40.0 20.0 20.0 0.0 20.0 0.0 0.0 0.0 1.13 2.25 3.38 4.50 40.0 0.0 0.28 IDC (A) 0.55 0.83 0.0 1.10 0.20 0.40 0.60 IDC (A) IDC (A) Soldering Profile Temperature Rising Area Preheat Area +4.0 C / sec. max. 150~200 C / 60~120 sec. Reflow Area Forced Cooling Area +3.0 C / sec. max. -(1.0~5.0) C / sec. max. 250 Temperature (C) 217 C Peak Temperature: 245 C max. 60 ~ 150 sec. 60 sec. max. 200 150 Time Above 245 C: 30 sec. max. 60 ~ 120 sec. 100 Time Above 217 C: 60 ~ 150 sec. max. 50 0 50 100 150 200 250 Time (Seconds) Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. 3312 - 2 mm TrimmingShielded Potentiometer SRF1280A SeriesSMD - Dual-Winding Power Inductors Packaging Specifications 2.0 0.5 (.079 .020) 330 DIA. (12.99) 21.0 0.8 (.827 .031) 30.4 (1.197) 13.0 0.5 (.512 .020) DIA. 50.0 -0 (1.97 -0) 13.0 DIA. (.512) 24.0 (.945) 26 +0 (1.024 +0) 20.0 (.787) END NO COMPONENT 4.0 (.157) COMPONENTS START NO COMPONENT 400 (15.75) 200 (7.87) USER DIRECTION OF FEED QTY: 400 PCS. PER REEL DIMENSIONS: MM (INCHES) Asia-Pacific: Tel: +886-2 2562-4117 * Fax: +886-2 2562-4116 EMEA: Tel: +36 88 520 390 * Fax: +36 88 520 211 The Americas: Tel: +1-951 781-5500 * Fax: +1-951 781-5700 www.bourns.com 11/14 Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Bourns: SRF1280A-821M SRF1280A-8R2Y SRF1280A-220M SRF1280A-151M SRF1280A-6R8Y SRF1280A-1R5Y SRF1280A-100M SRF1280A-330M SRF1280A-471M SRF1280A-1R0Y SRF1280A-221M SRF1280A-102M SRF1280A-331M SRF1280A-101M SRF1280A-4R7Y SRF1280A-820M SRF1280A-681M SRF1280A-680M SRF1280A-2R2Y SRF1280A-470M SRF1280A-3R3Y SRF1280A-R47Y SRF1280A-150M SRF1280A-652Y