Lasting . Leaning . Leading 3L Electronic Corp. Web : http://www.3lcoil.com
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SMTTC SERIES
SMT TOROIDS POWER CHOKES.
Applications :
．Computer and portable power devices.
．Energy storage applications.
．DC/DC converters.
．Input – output filter application.
Shape and Dimensions (Dimensions are in mm) :
Item A(MAX) B(MAX) C(MAX)
SMTTC30 11.05 11.18 9.50
SMTTC38 14.22 14.35 9.50
SMTTC44 14.99 15.62 10.50
SMTTC50 17.02 17.78 10.50
Item D H I J
SMTTC30 8.89 10.16 1.52 9.14
SMTTC38 11.43 13.21 1.52 11.68
SMTTC44 12.70 13.97 1.52 12.95
SMTTC50 14.73 15.75 1.52 14.99
Features : Product identification :
．High current with closed magnetic path eliminate SMT TC30 - 18 - 120 M
stray electromagnetic emissions. (1) (2) (3) (4) (5)
．Self-leaded design ensure rugged reliability. (1) Type : Surface Mountable Type.
．Ideal inductors for DC-DC conversion. (2) Style : 0.3 Inch size Toroids.
．Base material meets flammability requirements of . (3)Materials: Refer to the next page.
UL 94-V0. (4)Inductance : Example : 120 for 12.0 uH.
．In addition to the standard values shown, 3L can (5)Inductance tolerance : M : ± 20%.
custom engineer parts for specific applications.
Characteristics : Test equipments :
．Saturation Current (Isat): The current when the
inductance becomes 30% lower than its initial
value.(Ta=20℃)
．Temperature Rise Current( Irms): The current when
temperature of coil increase up to max.△T=40
℃.(Ta=20℃).
．Operating temperature : -20℃ to 105℃.
．Inductance measured at 0Adc on an HP 4284A LCR
Meter @100kHz 0.1V.
．DCR measured on a Chroma 16502 micro-ohmmeter
or equivalent.
．Electrical specifications at 25℃.
Lasting . Leaning . Leading 3L Electronic Corp. Web : http://www.3lcoil.com
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l SMTTC30 series
Part No. L
(uH) DCR
(mΩ) SRF
(MHz) I sat
(A) I rms
(A)
±20% Max. Typ. Typ. Max.
SMTTC30 - 8/90 - 1R8M 1.8 12.0 140 12 5.5
SMTTC30 - 8/90 - 3R3M 3.3 19.9 110 10 4.8
SMTTC30 - 8/90 - 6R8M 6.8 47.2 55 6.5 2.8
SMTTC30 - 8/90 - 220M 22 166 15 3.5 1.4
SMTTC30 - 8/90 - 101M 100 640 5.0 1.6 0.94
SMTTC30 - 18 - 2R7M 2.7 12.0 125 7.4 5.5
SMTTC30 - 18 - 5R2M 5.2 19.9 102 5.4 4.8
SMTTC30 - 18 - 120M 12 47.2 52 3.5 2.8
SMTTC30 - 18 - 350M 35 166 12 2.0 1.4
SMTTC30 - 18 - 171M 170 640 4.0 0.95 0.94
SMTTC30 - 52 - 3R6M 3.6 12.0 150 5.0 5.5
SMTTC30 - 52 - 6R8M 6.8 19.9 110 3.7 4.8
SMTTC30 - 52 - 150M 15 47.2 45 2.5 2.8
SMTTC30 - 52 - 470M 47 166 14 1.4 1.4
SMTTC30 - 52 - 221M 220 640 4.2 0.64 0.94
SMTTC30 - M125 - 6R0M 6.0 12.0 95 4.6 5.5
SMTTC30 - M125 - 120M 12 19.9 75 3.4 4.8
SMTTC30 - M125 - 220M 22 47.2 50 2.4 2.8
SMTTC30 - M125 - 820M 82 166 10 1.3 1.4
SMTTC30 - M125 - 391M 390 640 3 0.60 0.94
l SMTTC38 series
SMTTC38 - 8/90 - 1R5M 1.5 9.3 133 18 8.0
SMTTC38 - 8/90 - 3R3M 3.3 18.7 73 12 5.4
SMTTC38 - 8/90 - 8R2M 8.2 63 24 7.5 2.7
SMTTC38 - 8/90 - 270M 27 290 12 4.0 1.3
SMTTC38 - 8/90 - 101M 100 657 4.0 2.1 0.90
SMTTC38 - 18 - 3R8M 3.8 9.3 133 8.8 8.0
SMTTC38 - 18 - 7R5M 7.5 18.7 73 5.8 5.4
SMTTC38 - 18 - 220M 22 63 34 3.5 2.7
SMTTC38 - 18 - 730M 73 290 5.0 2.0 1.3
SMTTC38 - 18 - 291M 290 657 2.0 0.98 0.90
SMTTC38 - 52 - 4R7M 4.7 9.3 133 6.5 8.0
SMTTC38 - 52 - 100M 10 18.7 62 4.4 5.4
SMTTC38 - 52 - 330M 33 63 25 2.4 2.7
SMTTC38 - 52 - 101M 100 290 5.0 1.4 1.3
SMTTC38 - 52 - 391M 390 657 1.8 0.71 0.90
SMTTC38 - M125 - 6R8M 6.8 9.3 133 6.2 8.0
SMTTC38 - M125 - 150M 15 18.7 58 4.2 5.4
SMTTC38 - M125 - 390M 39 63 18 2.6 2.7
SMTTC38 - M126 - 121M 120 290 4.0 1.6 1.3
SMTTC38 - M127 - 471M 470 657 1.2 0.74 0.90
Lasting . Leaning . Leading 3L Electronic Corp. Web : http://www.3lcoil.com
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l SMTTC44 series
Part No. L
(uH) DCR
(mΩ) SRF
(MHz) I sat
(A) I rms
(A)
±20% Max. Typ. Typ. Max.
SMTTC44 - 8/90 - 5R6M 5.6 16.2 65 11.0 7.8
SMTTC44 - 8/90 - 100M 10.0 23.6 40 9.0 5.5
SMTTC44 - 8/90 - 150M 15.0 39.0 25 7.4 4.0
SMTTC44 - 8/90 - 270M 27.0 85.0 12 5.4 2.7
SMTTC44 - 8/90 - 681M 680 1908 1.4 1.0 0.70
SMTTC44 - 18 – 7R9M 7.9 16.2 49 6.6 7.8
SMTTC44 - 18 - 140M 14.0 23.6 33 5.2 5.5
SMTTC44 - 18 - 220M 22.0 39.0 23 4.1 4.0
SMTTC44 - 18 - 410M 41.0 85.0 9.5 3.0 2.7
SMTTC44 - 18 - 112M 1100 2500 1.2 0.58 0.70
SMTTC44 - 52 - 120M 12 16.2 62 4.5 7.8
SMTTC44 - 52 - 180M 18 23.6 35 3.5 5.5
SMTTC44 - 52 - 270M 27 39.0 26 2.8 4.0
SMTTC44 - 52 - 560M 56 85.0 9.0 2.0 2.7
SMTTC44 - 52 - 152M 1500 1908 0.85 0.39 0.70
SMTTC44 - M125 - 180M 18 16.2 49 4.3 7.8
SMTTC44 - M125 - 270M 27 23.6 33 3.4 5.5
SMTTC44 - M125 - 470M 47 39.0 23 2.6 4.0
SMTTC44 - M125 - 101M 100 85.0 7.5 1.8 2.7
SMTTC44 - M125 - 222M 2200 1908 0.60 0.38 0.70
l SMTTC50 series
SMTTC50 - 8/90 - 100M 10 19.7 35 9.0 7.2
SMTTC50 - 8/90 - 150M 15 32 27 7.5 5.1
SMTTC50 - 8/90 - 470M 47 133 7.0 4.3 2.6
SMTTC50 - 8/90 - 101M 100 220 3.8 2.9 2.0
SMTTC50 - 8/90 - 152M 1500 1932 0.72 0.76 0.71
SMTTC50 - 18 - 160M 16 19.7 24 5.4 7.2
SMTTC50 - 18 - 260M 26 32 11 4.3 5.1
SMTTC50 - 18 - 730M 73 133 4.5 2.5 2.6
SMTTC50 - 18 - 151M 150 220 2.6 1.8 2.0
SMTTC50 - 18 - 202M 2000 1932 0.60 0.50 0.71
SMTTC50 - 52 - 180M 18 19.7 35 4.4 7.2
SMTTC50 - 52 - 270M 27 32 27 3.6 5.1
SMTTC50 - 52 - 101M 100 133 5.2 1.9 2.6
SMTTC50 - 52 - 221M 220 220 2.2 1.3 2.0
SMTTC50 - 52 - 272M 2700 1932 0.50 0.37 0.71
SMTTC50 - M125 - 330M 33 19.7 19 3.5 7.2
SMTTC50 - M125 - 470M 47 32 16 2.8 5.1
SMTTC50 - M125 - 151M 150 133 3.6 1.6 2.6
SMTTC50 - M125 - 331M 330 220 2.0 1.2 2.0
SMTTC50 - M125 - 472M 4700 1932 0.45 0.31 0.71
* Due to the limited space, the catalogue shows the typical specifications only. For more specific details ( characteristics graph, reliability, and others),
kindly invite you to access 3L official website www.3lcoil.com for better known.
