6
6-69 Model HM28 Series
FEATURES AND BENEFITS
• Compact size, large inductance
• Excellent frequency characteristic
• Low magnetic flux leakage
• Complies with UL, VDE safety requirements
Insulation Resistance, Minimum 100 Megohm
Voltage Rating 250 VAC
Insulation System Class B, 130°C
Temperature Rise, Maximum 40°C
MODEL HM28 SERIES
Buckle Style Core
Common-Mode Chokes
Specifications subject to change without notice.
APPLICATIONS
• Switching power supplies
• Video and audio equipment
• Office equipment
• Communications equipment and other electronic devices
ELECTRICAL / ENVIRONMENTAL
(3)
(2)
L2
L1
(4)
(1)
SCHEMATIC
6-70 Model HM28 Series
.91
23.1
.157
4.0 .390±.010
10.0±0.25
.030±.002
0.76±0.05
Dia. Typ.
(2)(3) (2) (1)
.87
22.0 .87
22.0
.510±.010
13.0±0.25
OUTLINE DIMENSIONS (Inch/mm)
.390±.010
10.0±0.25
.030±.002
0.76±0.05
Dia. Typ.
(2) (1)
.67
17.0
.91
23.1
.157
4.0
.510±.010
13.0±0.25
(2)(3)
.87
22.0
.830±.010
21.0±0.25 .590±.010
15.0±0.25
(2)(3) (2) (1)
1.03
26.0
.94
24.0
.157
4.0
.030±.002
0.76±0.05
Dia. Typ.
1.03
26.0
(3) (2) .030±.002
0.76±0.05
Dia. Typ.
.940±.010
24.0±0.25 .790±.010
20.0±0.25
(2) (1)
1.18
30.0
.98
25.0
.157
4.0
1.18
30.0
Figure 1 Figure 2
Figure 3 Figure 4
6
6-71 Model HM28 Series
1.26
32.0
.197
5.0
.98
25.0 .75
19.0
.390±.010
10.0±0.25
.030±.002
0.76±0.05
Dia. Typ.
.510±0.10
13.0±0.25
(1)
(2)(3) (2)
OUTLINE DIMENSIONS (Inch/mm)
1.38
35.0
.197
5.0
1.18
30.0
.510±.010
13.0±0.25
(2)(3)
.87
22.0
.390±.010
10.0±0.25
.030±.002
0.76±0.06
Dia. Typ.
(1)(2)
1.65
42.0
.142
36.0
Reinforcing Pin
(Optional)
.197
5.0
.830±.010
21.0±0.25
.415
10.5
(2)(3)
1.06
27.0
.030±.002
0.76±0.05
Dia. Typ.
.590±.010
15.0±0.25
(1)(2)
Figure 5
Figure 7
Figure 6
6-72 Model HM28 Series
SPECIFICATIONS
Current Inductance DC
Part Rating @ 1.0 kHz Resistance Weight
Number Amps AC mH Min. ΩMax. Figure oz./gram
HM28-20001 0.50 9 1.40 1 0.53/15
HM28-20002 0.60 4.5 0.75 1 0.53/15
HM28-20003 0.70 2.5 0.40 1 0.53/15
HM28-20004 0.90 1.1 0.25 1 0.53/15
HM28-20005 1.0 0.45 0.13 1 0.53/15
HM28-24006 0.50 9 1.40 2 0.53/15
HM28-24007 0.60 4.5 0.75 2 0.53/15
HM28-24008 0.70 2.5 0.40 2 0.53/15
HM28-24009 0.90 1.1 0.25 2 0.53/15
HM28-24010 1.0 0.45 0.13 2 0.53/15
HM28-24011 0.50 36 2.70 3 0.90/25
HM28-24012 0.60 24 1.60 3 0.90/25
HM28-24013 0.70 9.2 0.75 3 0.90/25
HM28-24014 0.90 7.8 0.50 3 0.90/25
HM28-24015 1.0 5.2 0.34 3 0.90/25
HM28-24016 1.50 3.6 0.25 3 0.90/25
HM28-24017 2.0 3.2 0.20 3 0.90/25
HM28-32018 0.50 36 2.70 5 0.90/25
HM28-32019 0.60 24 1.60 5 0.90/25
HM28-32020 0.70 9.2 0.75 5 0.90/25
HM28-32021 0.90 7.8 0.50 5 0.90/25
HM28-32022 1.0 5.2 0.34 5 0.90/25
HM28-32023 1.50 3.6 0.25 5 0.90/25
HM28-32024 2.0 3.2 0.20 5 0.90/25
HM28-25025 0.50 120 2.60 4 1.4/40
6
6-73 Model HM28 Series
Current Inductance DC
Part Rating @ 1.0 kHz Resistance Weight
Number Amps AC mH Min. ΩMax. Figure oz./gram
HM28-25026 0.60 92 2.0 4 1.4/40
HM28-25027 0.70 66 1.50 4 1.4/40
HM28-25028 0.90 36 0.80 4 1.4/40
HM28-25029 1.0 25 0.60 4 1.4/40
HM28-25030 1.50 15.5 0.32 4 1.4/40
HM28-25031 2.0 10 0.25 4 1.4/40
HM28-25032 2.50 8 0.19 4 1.4/40
HM28-25033 3.0 5 0.10 4 1.4/40
HM28-35034 0.50 120 2.60 6 1.4/40
HM28-35035 0.60 92 2.0 6 1.4/40
HM28-35036 0.70 66 1.50 6 1.4/40
HM28-35037 0.90 36 0.80 6 1.4/40
HM28-35038 1.0 25 0.60 6 1.4/40
HM28-35039 1.50 15.5 0.32 6 1.4/40
HM28-35040 2.0 10 0.25 6 1.4/40
HM28-35041 2.50 8 0.19 6 1.4/40
HM28-35042 3.0 5 0.10 6 1.4/40
HM28-42051 1.50 33 0.50 7 2.7/76
HM28-42052 1.80 22 0.40 7 2.7/76
HM28-42053 2.0 18 0.30 7 2.7/76
HM28-42054 2.50 12 0.20 7 2.7/76
HM28-42055 2.70 10 0.15 7 2.7/76
HM28-42056 3.0 8.1 0.12 7 2.7/76
HM28-42057 3.50 6 0.10 7 2.7/76
HM28-42058 4.0 4.7 0.08 7 2.7/76
SPECIFICATIONS
6-74 Model HM28 Series
1000
300
100
30
10
3
1
0.3
0.1
0.01 0.03 0.1 0.3 1 3 10 30 100
INPENDANCE (K Ω)
FREQUENCY (MHz)
1000
300
100
30
10
3
1
0.3
0.1
0.01 0.03 0.1 0.3 1 3 10 30 100
INPENDANCE (K Ω)
FREQUENCY (MHz)
1000
300
100
30
10
3
1
0.3
0.1
0.01 0.03 0.1 0.3 1 3 10 30 100
INPENDANCE (K Ω)
FREQUENCY (MHz)
1000
300
100
30
10
3
1
0.3
0.1
0.01 0.03 0.1 0.3 1 3 10 30 100
INPENDANCE (K Ω)
FREQUENCY (MHz)
001
003
005
012
014
016
Impedance vs. Frequency
012, 014, 016
001, 003, 005
026, 029, 032 043, 046, 049
043
046
049
026
029
032
PERFORMANCE
