Document 112-2
“Slot Seven” 7 mm Tunable Inductors
Series 7M2 — Shielded with Plastic Sleeve
Test
frequency
Q min
@ L nom
DCR max
(Ohms)
Part Number
L min (µH)
L nom (µH)
L max (µH)
7M2-101
7M2-121
7M2-151
7M2-181
7M2-221
0.094
0.113
0.141
0.169
0.207
0.100
0.120
0.150
0.180
0.220
0.106
0.127
0.159
0.191
0.233
25 MHz
25 MHz
25 MHz
25 MHz
25 MHz
27
27
30
30
35
0.124
0.124
0.151
0.151
0.176
7M2-271
7M2-331
7M2-391
7M2-471
7M2-561
0.254
0.310
0.367
0.442
0.526
0.270
0.330
0.390
0.470
0.560
0.286
0.350
0.413
0.498
0.594
25 MHz
25 MHz
25 MHz
25 MHz
25 MHz
35
40
40
40
40
0.198
0.248
0.271
0.291
0.317
7M2-681
7M2-821
7M2-102
7M2-122
7M2-152
0.612
0.738
0.9
0.680
0.820
1.0
0.748
0.902
1.1
25 MHz
25 MHz
25 MHz
7.9 MHz
7.9 MHz
40
45
45
27
27
0.333
0.368
0.396
0.412
0.466
1.1
1.2
1.3
1.4
1.5
1.7
7M2-182
7M2-222
7M2-272
7M2-332
7M2-392
1.6
2.0
2.4
3.0
3.5
1.8
2.2
2.7
3.3
3.9
2.0
2.4
3.0
3.6
4.3
7.9 MHz
7.6 MHz
7.9 MHz
7.9 MHz
7.9 MHz
27
27
27
27
27
0.544
0.595
0.898
1.04
1.12
7M2-472
7M2-562
7M2-682
7M2-822
7M2-103
4.2
5.0
6.1
7.4
9.0
4.7
5.6
6.8
8.2
10
5.2
6.2
7.5
9.0
11
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
27
27
27
27
27
1.38
1.42
1.49
1.65
2.42
7M2-123
7M2-153
7M2-183
7M2-223
7M2-273
10
13
15
19
23
12
15
18
22
27
14
17
21
25
31
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
20
20
20
20
20
2.75
3.71
4.01
7.37
8.48
7M2-333
7M2-393
7M2-473
7M2-563
7M2-683
28
33
40
48
58
33
39
47
56
68
38
45
54
64
78
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
20
20
20
20
20
13.34
14.72
16.42
17.76
19.76
7M2-823
7M2-104
70
85
82
100
94
115
2.5 MHz
2.5 MHz
20
20
22.01
24.25
Parts in bold are included in Coilcraft Designer’s Kit M106.
Typical Q at L nom — Series 7M2
Notes:
1. All readings taken on Agilent/HP
4342-A Q Meter.
75
2. L min is achieved at maximum
extension of the core toward PC
board. Complete tuning range is
reached within the boundaries of the
coil form.
3. All specifications are at standard “Q”
meter frequencies. L and Q readings
change with frequency.
4. Shielded parts have a sleeve insert
to protect the winding.
5. Operating temperature range -40°C
to +85°C.
-331
50
25
-181
-102
-101
-332
-333
6. Electrical specifications at 25°C.
-104
0
1
10
100
Frequency (MHz)
Specifications subject to change without notice.
Please check our website for latest information.
Document112-2 Revised11/21/02
© Coilcraft, Inc. 2007