Open Circuit Inductance (OCL) Test Parameters: 10 kHz, 0.1 V
rms
, 0.0 Adc,
+25
°C
2.
I
rms
: 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.
I
sat
: 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
Dimensions - mm
Top view
Side view
Recommended pad layout
Schematic
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
2
RL1218
Unshielded radial leaded drum core inductors
Packaging information - mm
15
Technical Data 10338
E
ffective October 2017
15
Packaged 800 parts per roll
Inductance characteristics
% of OCL vs. % of I
sat
120
100
80
% of OCL
60
40
20
0
0
20
40
60
80
100
120
140
160
180
% of I
sat
www.eaton.com/electronics
3
Technical Data 10338
Effective October 2017
RL1218
Unshielded radial leaded drum core inductors
Wave solder profile
t
p
T
p
First Wave
Second Wave
Temperature
T
smax
T
styp
T
smin
Preheat area
Cool down area
Time
Reference EN 61760-1:2006
Profile Feature
Preheat
Temperature min. (T
smin
)
Temperature typ. (T
styp
)
Temperature max. (T
smax
)
Time (T
smin
to T
smax
) (t
s
)
preheat to max Temeperature
Peak temperature (T
p
)
Time at peak temperature (t
p
)
Ramp-down rate
Time 25°C to 25°C
Standard SnPb Solder
100°C
120°C
130°C
70 seconds
150°C max.
235
°
C - 260
°
C
Lead (Pb) Free Solder
100°C
120°C
130°C
70 seconds
150°C max.
250
°
C - 260
°
C
10 seconds max
5 seconds max each wave
~ 2 K/s min
~3.5 K/s typ
~5 K/s max
4 minutes
10 seconds max
5 seconds max each wave
~ 2 K/s min
~3.5 K/s typ
~5 K/s max
4 minutes
Manual solder
350°C, 4-5 seconds. (by soldering iron), generally manual, hand soldering is not recommended.
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.
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