Effective October 2017 Technical Data 10338 Supersedes October 2014 RL1218 Unshielded radial leaded drum core inductors Applications LED Drivers and lighting Utility meters Appliances and white goods Motor drives Power supplies General purpose filtering Environmental data Storage temperature range (Component): -40 C to +125 C Product features Operating temperature range: -40 C to +125 C Unshielded, leaded drum core (ambient plus self-temperature rise) Protective sleeving over winding HALOGEN Inductance range from 4.7 H to 12,000 H HF Pb Current range from 0.20 A to 15 A FREE 12.2 mm OD x 18.0 mm through-hole package Ferrite core materialTechnical Data 10338 RL1218 Effective October 2017 Unshielded radial leaded drum core inductors Product specifications 4 2 3 Part Number OCL I I DCR () SRF rms sat (H)10% (A) (A) +20 C max. (MHz) typ. RL1218-4R7-R 4.720% 5.65 15.0 0.017 34 RL1218-8R2-R 8.220% 4.75 10.7 0.025 25 RL1218-100-R 10 4.61 10.2 0.026 21 RL1218-150-R 15 4.05 8.00 0.034 11 RL1218-220-R 22 3.64 6.60 0.042 8 RL1218-270-R 27 3.44 5.97 0.047 6 RL1218-330-R 33 3.27 5.45 0.052 5 RL1218-101-R 100 2.31 3.16 0.102 3 RL1218-151-R 150 1.89 2.56 0.159 3 RL1218-181-R 180 1.64 2.34 0.211 3 RL1218-221-R 220 1.53 2.10 0.241 2 RL1218-331-R 330 1.25 1.73 0.366 2 RL1218-561-R 560 0.968 1.33 0.606 1 RL1218-102-R 1000 0.677 0.992 1.23 1 RL1218-152-R 1500 0.597 0.809 1.59 0.81 RL1218-472-R 4700 0.322 0.457 5.46 0.40 RL1218-562-R 5600 0.305 0.418 6.11 0.40 RL1218-682-R 6800 0.263 0.379 8.20 0.36 RL1218-123-R 12,000 0.201 0.286 14.1 0.28 1. Open Circuit Inductance (OCL) Test Parameters: 10 kHz, 0.1 V , 0.0 Adc, 3. I : Peak current for approximately 5% rolloff at +25 C rms sat +25 C 4. Part Number Definition: RL1218-yyy-R 2. I : DC current for an approximate temperature rise of 40 C without core rms - RL1218 = Product code and size loss. Derating is necessary for AC currents. PCB layout, trace thickness and - yyy= Inductance value in H, R = decimal point, width, air-flow, and proximity of other heat generating components will affect if no R is present then third character = number of zeros. the temperature rise. It is recommended that the temperature of the part not - -R suffix = RoHS compliant exceed +125 C under worst case operating conditions verified in the end application. Dimensions - mm Top view Side view Recommended pad layout Schematic Part marking: 4xxx wly R 4 = RL1218 xxx = inductance in H, R = decimal point if there is no R then third character = number of zeros wly = date code, R = revision level * Lead length is after the components are trimmed from the packaging tape roll. Do not route traces or vias underneath the inductor 2