Product features
•Unshielded, leaded drum core
•Protective sleeving over winding
•Inductance range from 4.7 μH to 12,000 μH
•Current range from 0.20 A to 15 A
•12.2 mm OD x 18.0 mm through-hole
package
•Ferrite core material
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
•Operating temperature range: -40 °C to +125 °C
(ambient plus self-temperature rise)
RL1218
Unshielded radial leaded drum core inductors
Technical Data 10338 Effective October 2017
Supersedes October 2014
HALOGEN
HF
FREE
Pb
2
Technical Data 10338
Effective October 2017
RL1218
Unshielded radial leaded drum core inductors
Dimensions - mm
Product specifications
Part Number4OCL¹
(μH)±10%
Irms
2
(A)
Isat
3
(A)
DCR (Ω)
@ +20 °C max.
SRF
(MHz) typ.
RL1218-4R7-R 4.7±20% 5.65 15.0 0.017 34
RL1218-8R2-R 8.2±20% 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 Vrms, 0.0 Adc,
+25 °C
2. Irms: DC current for an approximate temperature rise of 40 °C without core
loss. Derating is necessary for AC currents. PCB layout, trace thickness and
width, air-flow, and proximity of other heat generating components will affect
the temperature rise. It is recommended that the temperature of the part not
exceed +125 °C under worst case operating conditions verified in the end
application.
3. Isat: Peak current for approximately 5% rolloff at +25 °C
4. Part Number Definition: RL1218-yyy-R
- RL1218 = Product code and size
- yyy= Inductance value in μH, R = decimal point,
if no R is present then third character = number of zeros.
- “-R” suffix = RoHS compliant
Top view Side view SchematicRecommended pad layout
Part marking: 4xxx
wly R
4 = RL1218
xxx = inductance in µH, 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
www.eaton.com/electronics
3
RL1218
Unshielded radial leaded drum core inductors
Technical Data 10338
Effective October 2017
Packaging information - mm
15
15
Packaged 800 parts per roll
Inductance characteristics
0
20
40
60
80
100
120
020406080100 120140 160180
% of OCL
% of Isat
% of OCL vs. % of Isat
Technical Data 10338
Effective October 2017
RL1218
Unshielded radial leaded drum core inductors
Reference EN 61760-1:2006
Profile Feature Standard SnPb Solder Lead (Pb) Free Solder
Preheat
Temperature min. (Tsmin) 100°C 100°C
Temperature typ. (Tstyp) 120°C 120°C
Temperature max. (Tsmax) 130°C 130°C
Time (Tsmin to Tsmax) (ts) 70 seconds 70 seconds
∆preheat to max Temeperature150°C max. 150°C max.
Peak temperature (Tp) 235°C - 260°C 250°C - 260°C
Time at peak temperature (tp) 10 seconds max
5 seconds max each wave
10 seconds max
5 seconds max each wave
Ramp-down rate
~ 2 K/s min
~3.5 K/s typ
~5 K/s max
~ 2 K/s min
~3.5 K/s typ
~5 K/s max
Time 25°C to 25°C 4 minutes 4 minutes
Manual solder
350°C, 4-5 seconds. (by soldering iron), generally manual, hand soldering is not recommended.
Temperature
Time
Tsmin
Tsmax
Tstyp
Tp
tp
First Wave Second Wave
Preheat area Cool down area
∆
Wave solder profile
Life Support Policy: Eaton does not authorize the use of any of its products for use in life support devices or systems without the express written
approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when properly
used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.
Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Eaton also
reserves the right to change or update, without notice, any technical information contained in this bulletin.
Eaton
Electronics Division
1000 Eaton Boulevard
Cleveland, OH 44122
United States
www.eaton.com/electronics
© 2017 Eaton
All Rights Reserved
Printed in USA
Publication No. 10338 BU-SB14695
October 2017
Eaton is a registered trademark.
All other trademarks are property
of their respective owners.
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Eaton:
RL1218-4R7-R RL1218-8R2-R RL1218-100-R RL1218-150-R RL1218-220-R RL1218-270-R RL1218-330-R
RL1218-101-R RL1218-151-R RL1218-181-R RL1218-221-R RL1218-331-R RL1218-561-R RL1218-102-R
RL1218-152-R RL1218-472-R RL1218-562-R RL1218-682-R RL1218-123-R
