Description
•Surface mount magnetics that can be used as single
or coupled inductors or 1:1 transformers that provide
isolation between two windings
•OCTA-PAC’s are designed around high frequency, low loss core
material
•ECONO-PAC’s are a lower cost version of OCTA-PAC’s
offering high saturation flux density, Powder Iron core material
•OCTA-PAC PLUS’s offer higher current ratings and higher
saturation flux densities than OCTA-PAC and ECONO-PAC,
Amorphous metal core material
•Secure 4 Terminal Mounting
•Inductor more versatile inductance combination by series or
parallel connections
Applications
•Computer and portable power devices
•LCD panels, DVD players
•Inductor: DC-DC converters
•Buck, boost, forward, and resonant converters
•Noise filtering and filter chokes
•Transformers: 1:1 300Vdc isolation, flyback, sepic
Environmental Data
•Storage temperature range: -40°C to +125°C
•Operating ambient temperature range: -40°C to +85°C (range
is application specific).
•Solder reflow temperature: +260°C max. for 10 seconds max.
Packaging
•Supplied in tape and reel packaging, 1100 (EP01, OPA1, and
OP01), 800 (EP02, OP02, OPA2, EP03, OPA3, and OP03),
and 600 (EP04, OPA4, and OP04) per reel
Legend
Marking
•CTX___-__ (First three digits CTX; Second 2-3 digits =
Inductance Value; Last 1-2 digits, product size & type)
Product Size/Type
•CTX___-1 (-1 = size; no suffix = OCTA-PAC
®
)
•CTX___-1P (-1 = size; P suffix = ECONO-PAC™)
•CTX___-1A (-1 = size; A suffix = OCTA-PAC
®
PLUS)
ECONO-PAC™/OCTA-PAC®
OCTA-PAC®PLUS
Power Inductors and Transformers
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NNuummbbeerrµµHH ++//--2200%%µµHH mmiinn..AAddccoohhmmss mmaaxx..µµHH ++//--2200%%µµHH mmiinn..AAddccoohhmmss mmaaxx..
CTX0.47-1P-R .42 .31 5.50 .005 1.67 1.25 2.75 .021
CTX0.68-1P-R .60 .43 5.10 .006 2.40 1.74 2.55 .025
CTX1-1P-R 1.07 .73 4.50 .008 4.28 2.92 2.25 .032
CTX2-1P-R 2.02 1.36 3.40 .013 8.08 5.44 1.70 .054
CTX5-1P-R 4.83 3.37 2.00 .040 19.31 13.47 1.00 .161
CTX8-1P-R 8.08 5.31 1.80 .052 32.33 21.23 .90 .207
CTX10-1P-R 9.62 6.23 1.70 .057 38.48 24.94 .85 .227
CTX15-1P-R 15.03 9.62 1.40 .087 60.12 38.47 .70 .348
CTX20-1P-R 20.46 14.12 1.00 .158 81.83 56.47 .50 .634
CTX25-1P-R 25.40 17.07 .96 .177 101.60 68.29 .48 .708
CTX33-1P-R 32.33 22.27 .80 .250 129.32 89.06 .40 1.001
CTX50-1P-R 50.52 33.57 .70 .316 202.07 134.27 .35 1.263
CTX68-1P-R 68.40 43.65 .66 .373 273.61 174.61 .33 1.490
CTX100-1P-R 99.01 63.64 .54 .557 396.06 254.55 .27 2.227
CTX150-1P-R 150.72 96.64 .44 .844 602.87 386.56 .22 3.376
CTX200-1P-R 198.41 130.79 .36 1.208 793.65 523.16 .18 4.831
CTX300-1P-R 299.87 190.05 .32 1.525 1199.46 760.19 .16 6.100
CTX0.47-2P-R .54 .42 5.90 .006 2.18 1.69 2.95 .024
CTX0.68-2P-R .85 .64 5.40 .007 3.40 2.55 2.70 .029
CTX1-2P-R 1.22 .89 5.00 .008 4.90 3.57 2.50 .033
CTX2-2P-R 2.18 1.56 3.90 .014 8.70 6.26 1.95 .055
CTX5-2P-R 4.90 3.57 2.50 .032 19.58 14.26 1.25 .128
CTX8-2P-R 7.65 5.31 2.30 .040 30.60 21.23 1.15 .158
CTX10-2P-R 9.83 6.73 2.10 .045 39.30 26.92 1.05 .179
CTX15-2P-R 14.99 10.51 1.60 .085 59.98 42.02 .80 .339
CTX20-2P-R 19.58 13.37 1.50 .097 78.34 53.48 .75 .387
CTX25-2P-R 24.79 16.60 1.40 .109 99.14 66.38 .70 .436
CTX33-2P-R 32.67 21.29 1.30 .126 130.70 85.17 .65 .503
CTX50-2P-R 49.10 35.31 .82 .305 196.38 141.24 .41 1.221
CTX68-2P-R 68.85 47.93 .76 .362 275.40 191.71 .38 1.445
CTX100-2P-R 99.14 69.56 .62 .541 396.58 278.22 .31 2.162
CTX150-2P-R 148.10 100.07 .56 .665 592.42 400.27 .28 2.660
CTX200-2P-R 201.59 138.49 .46 .951 806.34 553.97 .23 3.804
CTX300-2P-R 300.42 197.52 .42 1.176 1201.70 790.08 .21 4.703
PARALLEL SERIES
RoHS
2002/95/EC
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NNuummbbeerrµµHH ++//--2200%%µµHH mmiinn..AAddccoohhmmss mmaaxx..µµHH ++//--2200%%µµHH mmiinn..AAddccoohhmmss mmaaxx..
CTX0.47-3P-R .46 .35 6.20 .006 1.85 1.42 3.10 .025
CTX0.68-3P-R .67 .50 5.70 .007 2.66 1.98 2.85 .028
CTX1-3P-R .91 .65 5.40 .008 3.63 2.62 2.70 .032
CTX2-3P-R 1.85 1.24 4.60 .011 7.40 4.97 2.30 .045
CTX5-3P-R 4.74 3.04 3.20 .022 18.94 12.15 1.60 .090
CTX8-3P-R 8.16 4.90 2.80 .030 32.63 19.60 1.40 .119
CTX10-3P-R 9.79 5.71 2.70 .033 39.15 22.85 1.35 .131
CTX15-3P-R 14.50 8.50 2.20 .050 58.02 34.01 1.10 .198
CTX20-3P-R 20.15 13.12 1.50 .111 80.59 52.48 .75 .443
CTX25-3P-R 25.33 16.16 1.40 .125 101.31 64.66 .70 .499
CTX33-3P-R 32.63 20.32 1.30 .146 130.54 81.30 .65 .571
CTX50-3P-R 50.02 33.06 .92 .277 200.10 132.24 .46 1.108
CTX68-3P-R 68.84 44.15 .84 .328 275.35 176.61 .42 1.312
CTX100-3P-R 101.31 65.50 .68 .501 405.22 262.02 .34 2.005
CTX150-3P-R 149.85 90.92 .64 .621 599.40 363.68 .32 2.483
CTX200-3P-R 200.10 116.51 .60 .731 800.38 466.03 .30 2.925
CTX300-3P-R 298.39 172.12 .50 .926 1193.55 688.50 .25 3.702
CTX0.47-4P-R .49 .37 7.90 .005 1.95 1.49 3.95 .019
CTX0.68-4P-R .76 .56 7.20 .006 3.05 2.24 3.60 .023
CTX1-4P-R 1.10 .81 5.90 .008 4.39 3.24 2.95 .033
CTX2-4P-R 1.95 1.42 4.60 .014 7.81 5.69 2.30 .055
CTX5-4P-R 5.15 3.56 3.30 .027 20.62 14.23 1.65 .107
CTX8-4P-R 7.81 5.15 3.00 .033 31.23 20.61 1.50 .131
CTX10-4P-R 9.88 6.70 2.50 .047 39.53 26.79 1.25 .187
CTX15-4P-R 14.76 9.52 2.30 .057 59.05 38.09 1.15 .228
CTX20-4P-R 20.62 13.44 1.90 .084 82.47 53.76 .95 .337
CTX25-4P-R 25.65 17.17 1.60 .115 102.60 68.68 .80 .461
CTX33-4P-R 33.21 22.93 1.30 .166 132.86 91.72 .65 .662
CTX50-4P-R 48.80 32.21 1.20 .201 195.20 128.83 .60 .805
CTX68-4P-R 67.37 43.04 1.10 .238 269.50 172.16 .55 .952
CTX100-4P-R 99.09 69.54 .72 .565 396.38 278.15 .36 2.259
CTX150-4P-R 149.45 101.46 .64 .696 597.80 405.83 .32 2.784
CTX200-4P-R 200.11 131.37 .60 .810 800.44 525.47 .30 3.240
CTX300-4P-R 298.93 188.03 .54 1.003 1195.72 752.13 .27 4.011
CTX0.47-1-R .40 .26 5.50 .005 1.60 1.05 2.75 .020
CTX0.68-1-R .63 .41 4.50 .006 2.50 1.63 2.25 .024
CTX1-1-R .90 .56 4.20 .007 3.60 2.24 2.10 .028
CTX2-1-R 2.03 1.00 4.10 .010 8.10 4.01 2.05 .040
CTX5-1-R 4.90 2.66 2.30 .030 19.60 10.64 1.15 .122
CTX8-1-R 8.10 4.08 2.00 .039 32.40 16.34 1.00 .157
CTX10-1-R 10.00 4.85 1.90 .044 40.00 19.40 .95 .176
CTX15-1-R 14.40 8.74 1.10 .080 57.60 34.96 .55 .319
CTX20-1-R 19.60 11.54 1.00 .146 78.40 46.15 .50 .583
CTX25-1-R 25.60 16.35 .74 .167 102.40 65.42 .37 .668
CTX33-1-R 32.40 19.84 .72 .293 129.60 79.37 .36 1.171
CTX50-1-R 50.63 29.34 .64 .365 202.50 117.38 .32 1.461
CTX68-1-R 67.60 39.73 .54 .516 270.40 158.92 .27 2.064
CTX100-1-R 99.23 58.72 .44 .784 396.90 234.88 .22 3.137
CTX150-1-R 148.23 85.16 .38 .965 592.90 340.64 .19 3.861
CTX200-1-R 202.50 107.60 .37 1.142 810.00 430.39 .19 4.567
CTX300-1-R 302.50 191.38 .22 1.431 1210.00 765.54 .11 5.724
CTX0.47-2-R .42 .29 6.50 .005 1.69 1.17 3.25 .019
CTX0.68-2-R .75 .50 5.50 .006 3.01 1.98 2.75 .024
CTX1-2-R 1.18 .76 4.60 .007 4.70 3.04 2.30 .028
CTX2-2-R 2.30 1.27 4.50 .010 9.21 5.07 2.25 .038
CTX5-2-R 4.70 2.66 3.00 .021 18.80 10.65 1.50 .084
CTX8-2-R 7.94 4.18 2.60 .027 31.77 16.72 1.30 .108
CTX10-2-R 10.58 5.18 2.50 .031 42.30 20.72 1.25 .125
CTX15-2-R 15.23 8.53 1.70 .059 60.91 34.10 .85 .236
CTX20-2-R 20.73 12.36 1.30 .107 82.91 49.46 .65 .426
CTX25-2-R 24.86 16.09 1.00 .117 99.45 64.35 .50 .466
CTX33-2-R 31.77 15.90 1.40 .105 127.09 63.59 .70 .420
CTX50-2-R 51.18 28.79 .92 .210 204.73 115.16 .46 .839
CTX68-2-R 67.87 38.71 .78 .303 271.47 154.83 .39 1.214
CTX100-2-R 99.45 57.45 .63 .457 397.81 229.79 .32 1.828
PARALLEL SERIES
ECONO-PAC™/OCTA-PAC®
OCTA-PAC®PLUS
Power Inductors and Transformers
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NNuummbbeerrµµHH ++//--2200%%µµHH mmiinn..AAddccoohhmmss mmaaxx..µµHH ++//--2200%%µµHH mmiinn..AAddccoohhmmss mmaaxx..
CTX150-2-R 147.39 93.46 .43 .560 589.57 373.84 .22 2.241
CTX200-2-R 198.58 122.94 .39 .796 794.30 491.76 .20 3.184
CTX300-2-R 300.80 169.06 .38 1.231 1203.20 676.24 .19 4.929
CTX0.47-3-R .38 .27 6.00 .005 1.54 1.08 3.00 .020
CTX0.68-3-R .60 .42 5.00 .006 2.40 1.67 2.50 .024
CTX1-3-R .86 .57 4.80 .007 3.46 2.28 2.40 .028
CTX2-3-R 1.94 1.05 4.70 .010 7.78 4.22 2.35 .040
CTX5-3-R 4.70 2.56 3.00 .019 18.82 10.26 1.50 .077
CTX8-3-R 7.78 3.74 2.80 .025 31.10 14.98 1.40 .099
CTX10-3-R 9.60 4.38 2.70 .028 38.40 17.54 1.35 .111
CTX15-3-R 15.00 7.26 2.00 .043 60.00 29.06 1.00 .172
CTX20-3-R 20.18 10.76 1.50 .078 80.74 43.04 .75 .312
CTX25-3-R 24.58 15.64 .98 .086 98.30 62.56 .49 .346
CTX33-3-R 32.86 19.69 .96 .083 131.42 78.77 .48 .331
CTX50-3-R 50.78 27.18 .94 .239 203.14 108.71 .47 .956
CTX68-3-R 67.42 36.53 .80 .277 269.66 146.11 .40 1.109
CTX100-3-R 101.40 52.48 .70 .345 405.60 209.93 .35 1.381
CTX150-3-R 149.78 97.16 .38 .430 599.14 388.63 .19 1.718
CTX200-3-R 198.74 119.18 .39 .619 794.98 476.71 .20 2.475
CTX300-3-R 301.06 157.44 .40 .951 1204.22 629.75 .20 3.083
CTX0.47-4-R .44 .32 7.00 .004 1.76 1.29 3.50 .016
CTX0.68-4-R .78 .55 6.00 .005 3.14 2.21 3.00 .020
CTX1-4-R 1.23 .85 5.00 .006 4.90 3.41 2.50 .024
CTX2-4-R 1.76 1.06 4.90 .007 7.06 4.24 2.45 .028
CTX5-4-R 4.90 2.59 4.40 .014 19.60 10.37 2.20 .056
CTX8-4-R 8.28 4.29 3.50 .018 33.12 17.14 1.75 .072
CTX10-4-R 9.60 4.82 3.40 .019 38.42 19.28 1.70 .078
CTX15-4-R 14.16 6.76 3.00 .024 56.64 27.03 1.50 .096
CTX20-4-R 19.60 10.68 2.10 .055 78.40 42.73 1.05 .220
CTX25-4-R 25.92 13.32 2.00 .063 103.68 53.27 1.00 .253
CTX33-4-R 33.12 16.82 1.80 .072 132.50 67.27 .90 .287
CTX50-4-R 50.18 25.03 1.50 .111 200.70 100.11 .75 .443
CTX68-4-R 67.08 35.29 1.20 .157 268.32 141.15 .60 .630
CTX100-4-R 99.23 54.56 .92 .302 396.90 218.25 .46 1.210
CTX150-4-R 148.23 77.17 .82 .372 592.90 308.69 .41 1.488
CTX200-4-R 200.70 111.08 .64 .545 802.82 444.32 .32 2.180
CTX300-4-R 298.12 147.92 .62 .672 1192.46 591.66 .31 2.687
PARALLEL SERIES
ECONO-PAC™/OCTA-PAC®
OCTA-PAC®PLUS
Power Inductors and Transformers
ECONO-PAC™/OCTA-PAC®
OCTA-PAC®PLUS
Power Inductors and Transformers
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R25.0 25.60 2.08 1.89 0.111 7.69 102.38 1.04 0.94 0.443 15.4
C
CT
TX
X3
33
3-
-2
2A
A-
-R
R33.0 34.84 1.79 1.56 0.162 8.97 139.4 0.89 0.78 0.649 17.9
C
CT
TX
X5
50
0-
-2
2A
A-
-R
R50.0 49.38 1.50 1.28 0.240 10.7 197.5 0.75 0.64 0.961 21.4
C
CT
TX
X6
68
8-
-2
2A
A-
-R
R68.0 66.44 1.29 1.07 0.342 12.4 265.8 0.65 0.54 1.367 24.8
C
CT
TX
X1
10
00
0-
-2
2A
A-
-R
R100.0 102.38 1.04 0.75 0.695 15.4 409.5 0.52 0.38 2.778 30.8
C
CT
TX
X1
15
50
0-
-2
2A
A-
-R
R150.0 152.9 0.85 0.68 0.842 18.8 611.8 0.43 0.34 3.366 37.6
C
CT
TX
X2
20
00
0-
-2
2A
A-
-R
R200.0 197.5 0.75 0.64 0.950 21.4 790.0 0.38 0.32 3.800 42.7
C
CT
TX
X3
30
00
0-
-2
2A
A-
-R
R300.0 303.7 0.60 0.58 1.174 26.5 1215 0.30 0.29 4.697 53.0
C
CT
TX
X0
0.
.3
33
3-
-3
3A
A-
-R
R0.33 0.368 15.0 11.4 0.0032 0.97 1.47 7.50 5.72 0.0128 1.93
C
CT
TX
X0
0.
.6
68
8-
-3
3A
A-
-R
R0.68 0.688 11.3 9.3 0.0048 1.29 2.75 5.63 4.64 0.0194 2.58
C
CT
TX
X1
1-
-3
3A
A-
-R
R1.0 1.08 9.0 8.38 0.0059 1.61 4.20 4.50 4.19 0.0238 3.22
C
CT
TX
X2
2-
-3
3A
A-
-R
R2.0 2.11 6.43 7.26 0.0079 2.26 8.43 3.21 3.63 0.0317 4.51
C
CT
TX
X5
5-
-3
3A
A-
-R
R5.0 5.20 4.09 5.24 0.015 3.54 20.81 2.05 2.62 0.061 7.09
C
CT
TX
X8
8-
-3
3A
A-
-R
R8.0 8.43 3.21 4.23 0.023 4.51 33.77 1.61 2.12 0.093 9.02
C
CT
TX
X1
10
0-
-3
3A
A-
-R
R10.0 9.68 3.00 3.64 0.032 4.83 38.70 1.50 1.82 0.126 9.67
C
CT
TX
X1
15
5-
-3
3A
A-
-R
R15.0 15.52 2.37 3.25 0.039 6.12 62.09 1.18 1.63 0.158 12.2
C
CT
TX
X2
20
0-
-3
3A
A-
-R
R20.0 20.81 2.05 2.43 0.071 7.09 83.25 1.02 1.22 0.282 14.2
C
CT
TX
X2
25
5-
-3
3A
A-
-R
R25.0 24.77 1.88 2.34 0.076 7.73 99.07 0.94 1.17 0.306 15.5
C
CT
TX
X3
33
3-
-3
3A
A-
-R
R33.0 33.71 1.61 1.93 0.112 9.02 134.8 0.80 0.96 0.449 18.0
C
CT
TX
X5
50
0-
-3
3A
A-
-R
R50.0 49.71 1.32 1.56 0.171 11.0 198.8 0.66 0.78 0.686 21.9
1) Open Circuit Inductance Test Parameters: 100kHz, 0.250 Vrms, 0.0 Adc
Parallel: (1,4 - 3,2) Series: (1 - 3) tie (2 - 4)
2) Peak current for approximately 30% roll-off
3) RMS current, delta temp. of 40° C ambient temperature of 85° C
4) DCR @ 20°C
5) Hipot rating: winding to winding: 300Vdc min.
6) Turns Ratio: (1-2):(4-3) 1:1
7) Applied volt-time product (v-us) across the inductor. This value represents the
applied V-us at 300KHz necessary to generate a core loss equal to 10% of the
total losses for a 40°C temperature rise.
ECONO-PAC™/OCTA-PAC®
OCTA-PAC®PLUS
Power Inductors and Transformers
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C
CT
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X6
68
8-
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3A
A-
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R68.0 68.80 1.13 1.28 0.253 12.9 275.2 0.56 0.64 1.013 25.8
C
CT
TX
X1
10
00
0-
-3
3A
A-
-R
R100.0 99.07 0.94 1.05 0.379 15.5 396.3 0.47 0.53 1.514 30.9
C
CT
TX
X1
15
50
0-
-3
3A
A-
-R
R150.0 149.7 0.76 0.86 0.571 19.0 598.7 0.38 0.43 2.283 38.0
C
CT
TX
X2
20
00
0-
-3
3A
A-
-R
R200.0 198.8 0.66 0.71 0.829 21.9 795.3 0.33 0.35 3.315 43.8
C
CT
TX
X3
30
00
0-
-3
3A
A-
-R
R300.0 296.2 0.54 0.56 1.309 26.7 1185 0.27 0.28 5.236 53.5
C
CT
TX
X0
0.
.3
33
3-
-4
4A
A-
-R
R0.33 0.313 22.5 12.2 0.0030 0.98 1.25 11.25 6.09 0.0119 1.96
C
CT
TX
X0
0.
.6
68
8-
-4
4A
A-
-R
R0.68 0.744 15.0 10.6 0.0040 1.47 2.98 7.50 5.28 0.0158 2.94
C
CT
TX
X1
1-
-4
4A
A-
-R
R1.0 1.39 11.25 9.23 0.0052 1.96 5.57 5.63 4.62 0.0207 3.93
C
CT
TX
X2
2-
-4
4A
A-
-R
R2.0 2.18 9.00 8.38 0.0063 2.45 8.70 4.50 4.19 0.0251 4.91
C
CT
TX
X5
5-
-4
4A
A-
-R
R5.0 4.26 6.43 7.21 0.0085 3.44 17.05 3.21 3.61 0.0339 6.87
C
CT
TX
X8
8-
-4
4A
A-
-R
R8.0 8.70 4.50 5.49 0.015 4.91 34.80 2.25 2.74 0.059 9.81
C
CT
TX
X1
10
0-
-4
4A
A-
-R
R10.0 10.53 4.09 4.67 0.020 5.40 42.11 2.05 2.33 0.081 10.8
C
CT
TX
X1
15
5-
-4
4A
A-
-R
R15.0 14.70 3.46 3.87 0.029 6.38 58.81 1.73 1.94 0.117 12.8
C
CT
TX
X2
20
0-
-4
4A
A-
-R
R20.0 19.58 3.00 3.62 0.034 7.36 78.30 1.50 1.81 0.135 14.7
C
CT
TX
X2
25
5-
-4
4A
A-
-R
R25.0 25.14 2.65 3.02 0.048 8.34 100.51 1.32 1.51 0.193 16.7
C
CT
TX
X3
33
3-
-4
4A
A-
-R
R33.0 34.80 2.25 2.49 0.071 9.81 139.2 1.13 1.25 0.283 19.6
C
CT
TX
X5
50
0-
-4
4A
A-
-R
R50.0 50.11 1.88 2.05 0.104 11.8 200.4 0.94 1.03 0.418 23.6
C
CT
TX
X6
68
8-
-4
4A
A-
-R
R68.0 68.21 1.61 1.70 0.153 13.7 272.8 0.80 0.85 0.612 27.5
C
CT
TX
X1
10
00
0-
-4
4A
A-
-R
R100.0 100.57 1.32 1.37 0.235 16.7 402.3 0.66 0.69 0.939 33.4
C
CT
TX
X1
15
50
0-
-4
4A
A-
-R
R150.0 153.5 1.07 1.10 0.365 20.6 613.9 0.54 0.55 1.462 41.2
C
CT
TX
X2
20
00
0-
-4
4A
A-
-R
R200.0 200.4 0.94 0.92 0.521 23.6 801.8 0.47 0.46 2.085 47.1
C
CT
TX
X3
30
00
0-
-4
4A
A-
-R
R300.0 302.8 0.76 0.75 0.787 29.0 1211 0.38 0.37 3.148 57.9
1) Open Circuit Inductance Test Parameters: 100kHz, 0.250 Vrms, 0.0 Adc
Parallel: (1,4 - 3,2) Series: (1 - 3) tie (2 - 4)
2) Peak current for approximately 30% roll-off
3) RMS current, delta temp.of 40°C ambient temperature of 85° C
4) DCR @ 20°C
5) Hipot rating: winding to winding: 300Vdc min.
6) Turns Ratio: (1-2):(4-3) 1:1
7) Applied volt-time product (v-us) across the inductor.This value represents the
applied V-us at 300KHz necessary to generate a core loss equal to 10% of the
total losses for a 40°C temperature rise.
ECONO-PAC™/OCTA-PAC®
OCTA-PAC®PLUS
Power Inductors and Transformers
Mechanical Diagrams
CTX 1, 1P, 1A Series
CTX 2, 2P, 2A Series
CTX 3, 3P, 3A Series
CTX 4, 4P, 4A Series
Dimensions in Millimeters.wwllyy = (date code) R = revision level
ECONO-PAC™/OCTA-PAC®
OCTA-PAC®PLUS
Power Inductors and Transformers
CTX 2, 2P, 2A Series
CTX 3, 3P, 3A Series
CTX 4, 4P, 4A Series
Packaging Information
CTX 1, 1P, 1A Series
Dimensions are in millimeters.
Direction of Feed ➞
Direction of Feed ➞
Direction of Feed ➞
Direction of Feed ➞
Parts packaged on 13" Diameter reel,
1,100 parts per reel.
Parts packaged on 13" Diameter reel,
800 parts per reel.
Parts packaged on 13" Diameter reel,
800 parts per reel.
Parts packaged on 13" Diameter reel,
600 parts per reel.
• INDUCTANCE VS. CURRENT:
Inductance will fall off as DC Current is increased.
(See Inductance vs. Current graph).
•FREQUENCY RESPONSE:
Wide-band frequency response to 1 megaHertz.
•CURRENT LIMITATION:
The maximum allowable currents are defined by the internal
“hot-spot” temperatures which are limited to 130°C, including
ambient.
INDUCTANCE VS. CURRENT
Percentage of
Inductance
Per Unit Full Load Current
100
90
80
70
60
50
40
30
20
10
0
TEMPERATURE RISE VS. RATED CURRENT
Max. Ambient plus Rise = 125°C
Degrees C
Per Unit Full Load Current
140
120
100
80
60
40
20
0
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
-35 -15 +5 +25 +45 +65 +85 +105 +125
INDUCTANCE VS. TEMPERATURE
Percentage Change 
in Inductance
Temperature in Degrees C.
+8
+6
+4
+2
+0
-2
-4
-6
-8
-10
-12
-14
ECONO-PAC & OCTA-PAC
ECONO-PAC
OCTA-PAC
ECONO-PAC
OCTA-PAC
INDUCTANCE VS. CURRENT
Percentage of 
Inductance
Per Unit Full Load Current
100
90
80
70
60
50
40
30
20
10
0
TEMPERATURE RISE VS. RATED CURRENT
Max. Ambient plus Rise = 125°C
Degrees C
Per Unit Full Load Current
140
120
100
80
60
40
20
0
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
-35 -15 +5 +25 +45 +65 +85 +105 +125
INDUCTANCE VS. TEMPERATURE
Percentage Change
in Inductance
Temperature in Degrees C.
+8
+6
+4
+2
+0
-2
-4
-6
-8
-10
-12
-14
ECONO-PAC & OCTA-PAC
ECONO-PAC
OCTA-PAC
ECONO-PAC
OCTA-PAC
INDUCTANCE VS. CURRENT
Percentage of
Inductance
Per Unit Full Load Current
100
90
80
70
60
50
40
30
20
10
0
TEMPERATURE RISE VS. RATED CURRENT
Max. Ambient plus Rise = 125°C
Degrees C
Per Unit Full Load Current
140
120
100
80
60
40
20
0
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
-35 -15 +5 +25 +45 +65 +85 +105 +125
INDUCTANCE VS. TEMPERATURE
Percentage Change
in Inductance
Temperature in Degrees C.
+8
+6
+4
+2
+0
-2
-4
-6
-8
-10
-12
-14
ECONO-PAC & OCTA-PAC
ECONO-PAC
OCTA-PAC
ECONO-PAC
OCTA-PAC
Performance Characteristics
ECONO-PAC™/OCTA-PAC®
OCTA-PAC®PLUS
Power Inductors and Transformers
OCTA-PAC®PLUS Typical Inductance vs. DC Current OCTA-PAC®PLUS Winding Loss Derating with Core Loss
0 20 40 60 80 100 120 140 160 180 200
0
10
20
30
40
50
60
70
80
90
100
% of Isat
% of OCL
1000800600
50040030020010080605040302010
% of Applied Volt-µ-Second Rating
99
98
97
96
95
94
92
90
80
70
60
50
40
20
0
% of Losses from Irms (maximum)
1MHz
500KHz
300KHz
200KHz
100KHz
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Technologies reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Cooper
Electronic Technologies also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been
selected, it should be tested by the user in all possible applications.
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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.
PM-4314 3/07
© Cooper Electronic
Technologies 2007