SM Beads (Common- Mode)
Part Number: 2744045447
44 COMMON MODE SM BEAD
Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
– Last digit 6 = Bulk Packed 7 = Taped and Reeled
Surface mount common- mode beads are available from Fair- Rite in several materials and sizes. The common- mode bead
provides a common magnetic path for the flux generated by the current to the load and the return current from the load.
The current compensation results in zero magnetic flux in the bead.
Wires are oxygen free high conductivity copper with 100% matte tin plating over a nickel undercoating.
SM Beads meet the solderability specifications when tested in accordance with MIL- STD-202, method 208. After dipping the
mounting site of the bead, the solder surface shall be at least 95% covered with a smooth solder coating. The edges of the copper
strip are not specified as solderable surfaces.
After preheating the beads to within 100 °C of the soldering temperature, the parts meet the resistance to soldering requirements
of EIA-186-10E, temperature 260±5 °C and time 10±1 seconds.
Recommended storage and operation temperature is -55 °C to 125 °C.
Our “Surface Mount Bead Kit” (part number 0199000025) is available for prototype evaluation.
Recommended Soldering Profile
Packaging options:
– SM Beads can also be supplied not taped and reeled and then are bulk packed. This packing method will change the last digit of
the part number to a “6”.SM Beads on 12 mm tape width are supplied taped and reeled per EIA 481 and IEC 60286-3 standards.
– SM Beads on 16 and 24 mm tape widths are supplied taped and reeled per EIA 481 and IEC 60286-3 standards.
– Taped and reeled parts are supplied on a 13″ reel.
For any SM Bead requirement not listed, please contact our customer service group for availability and pricing.
Suggested land patterns are in accordance with the latest revision of IPC-7351.
Weight: 0.53 (g)
Dim mm mm tol
A
2.85 ±0.20
B
5.6
±0.20
C
8.9
-0.80
D
1.35 ±0.50
E
2.54 ±0.25
Land Patterns
V
W
4.00
07.00
(0.158”)
(0.276”)
nominal inch
0.112
0.22
0.339
0.053
0.1
X
1.80
(0.071”)
Y
3.00
(0.118”)
inch misc.
_
_
_
_
_
Z
2.54
(0.100”)
Reel Information
Tape Width Pitch
mm
mm
16
8
Parts 7"
Reel
--
Parts 13"
Reel
2400
Parts 14"
Reel
--
Chart Legend
+ Test frequency
Typical Impedance (Ω)
10 MHz
23
+
25 MHz
38
+
100 MHz
60
250 MHz
78
300 MHz
_
Electrical Properties
Max
1.4
Rdc(mΩ)
SM Beads are controlled for impedance limits only. Minimum impedance values are specified for the + marked frequencies. The
minimum impedance is typically the listed value less 20%. SM Beads in 44 materials are measured for impedance on the 4193
Vector Impedance Analyzer. The 52 SM Beads are tested for impedance on the 4291A RF Impedance Analyzer.
The maximum current rating for these SM Beads is 5 amps.
Fair- Rite Products Corp.
•
One Commercial Row, Wallkill, New York 12589-0288
888-324-7748 • 845-895-2055 • Fax: 845-895-2629 • ferrites@fair- rite.com • www.fair- rite.com
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