Document 112-3
“Slot Seven” 7 mm Tunable Inductors
Series 7M3 — Shielded with Ferrite Sleeve
Part number
7M3-151
7M3-181
7M3-221
7M3-271
7M3-331
7M3-391
7M3-471
7M3-561
7M3-681
7M3-821
7M3-102
7M3-122
7M3-152
7M3-182
7M3-222
7M3-272
7M3-332
7M3-392
7M3-472
7M3-562
7M3-682
7M3-822
7M3-103
7M3-123
7M3-153
7M3-183
7M3-223
7M3-273
7M3-333
7M3-393
7M3-473
7M3-563
7M3-683
7M3-823
7M3-104
7M3-124
7M3-154
7M3-184
7M3-224
L min (µH)
0.128
0.153
0.187
0.230
0.281
0.332
0.400
0.476
0.544
0.656
0.8
1.0
1.2
1.4
1.8
2.2
2.6
3.1
3.8
4.5
5.4
6.6
8
9
11
14
17
20
25
29
35
42
51
62
75
90
113
135
165
L nom (µH)
0.150
0.180
0.220
0.270
0.330
0.390
0.470
0.560
0.680
0.820
1.0
1.2
1.5
1.8
2.2
2.7
3.3
3.9
4.7
5.6
6.8
8.2
10
12
15
18
22
27
33
39
47
56
68
82
100
120
150
180
220
L max (µH)
0.173
0.207
0.253
0.311
0.380
0.449
0.541
0.644
0.816
0.984
1.2
1.4
1.8
2.2
2.6
3.2
4.0
4.7
5.6
6.7
8.2
9.8
12
15
19
23
28
34
41
49
59
70
85
103
125
150
188
225
275
Test
frequency
25 MHz
25 MHz
25 MHz
25 MHz
25 MHz
25 MHz
25 MHz
25 MHz
25 MHz
25 MHz
25 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
7.9 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
2.5 MHz
Q min
@ L nom
40
45
45
50
50
55
55
60
60
60
60
45
45
45
45
45
40
40
40
40
35
35
35
35
35
35
35
40
40
40
40
40
40
40
40
40
40
40
40
DCR max
(Ohms)
0.124
0.124
0.151
0.151
0.151
0.176
0.198
0.198
0.248
0.271
0.317
0.333
0.368
0.396
0.412
0.466
0.544
0.595
0.898
1.04
1.04
1.12
1.38
1.49
1.65
2.42
2.75
3.71
3.71
4.01
7.37
8.48
13.34
14.72
16.42
17.76
19.76
22.01
24.25
Parts in bold are included in Coilcraft Designer’s Kit M106.
Typical Q at L nom — Series 7M3
75
-182
-102
-331
-151
Q-Factor
50
-332
-562
-393
25
-683
Notes:
1. All readings taken on Agilent/HP
4342-A Q Meter.
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.
6. Electrical specifications at 25°C.
0
1
10
100
Frequency (MHz)
Specifications subject to change without notice.
Please check our website for latest information.
Document 112-3
Revised 11/21/02
© Coilcraft, Inc. 2007
COILCRAFT [ Coilcraft lnc. ]
