Document 112-1
“Slot Seven” 7 mm Tunable Inductors
This product is not RoHS-compliant. Contact Coilcraft
for current status or possible alternatives.
These versatile Coilcraft variable inductors operate over
a wide range of frequencies. Standard inductance val-
ues are available from less than 100 nH to over 250 µH.
Custom values can also be provided upon request.
Coilcraft “Slot Seven” RF coils come in an international
7 mm package. Their precision-molded slotted bobbins
ensure tight tolerances and high stability.
A variety of shielding options are offered. “Slot Seven”
coils are tuned by means of slotted ferrite tuning cores
for easy, positive adjustment. Use the Coilcraft Slot
Tuner for a precise fit to the tuning slug.
Coilcraft
Designer’s Kit M106
contains 39 coils (3
each). To order, please contact Coilcraft or purchase
on-line at
http://order.coilcraft.com.
Recommended
Board Layout
0.177 ±0.005 sq
4,50 ±0,13
0.0885 ref
2,248
Bottom View
0.300 max sq
7,62
1
2
3
0.039
(5)
0,99
Start
0.138 ±0.040
3,51 ±1,02
0.460 ±0.008
11,68 ±0,20
Finish
0.059
(2)
1,50
0.039 ±0.008
0,99 ±0,20
0.285
ref
7,24
Can tab centers
1.00 – 1.06 g
1.30 – 1.34 g
Tuning
slug
6
4
Tab thickness
0.006 ±0.0004
0,15 ±0,010
0.019 dia nom
0,48
Weight
7M2 series
7M3 series
Schematic
1
3
Specifications subject to change without notice.
Please check our website for latest information.
Document 112-1
Revised 02/16/05
© Coilcraft, Inc. 2007
Document 112-2
“Slot Seven” 7 mm Tunable Inductors
Series 7M2 — Shielded with Plastic Sleeve
Part Number
7M2-101
7M2-121
7M2-151
7M2-181
7M2-221
7M2-271
7M2-331
7M2-391
7M2-471
7M2-561
7M2-681
7M2-821
7M2-102
7M2-122
7M2-152
7M2-182
7M2-222
7M2-272
7M2-332
7M2-392
7M2-472
7M2-562
7M2-682
7M2-822
7M2-103
7M2-123
7M2-153
7M2-183
7M2-223
7M2-273
7M2-333
7M2-393
7M2-473
7M2-563
7M2-683
7M2-823
7M2-104
L min (µH)
0.094
0.113
0.141
0.169
0.207
0.254
0.310
0.367
0.442
0.526
0.612
0.738
0.9
1.1
1.4
1.6
2.0
2.4
3.0
3.5
4.2
5.0
6.1
7.4
9.0
10
13
15
19
23
28
33
40
48
58
70
85
L nom (µH)
0.100
0.120
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
L max (µH)
0.106
0.127
0.159
0.191
0.233
0.286
0.350
0.413
0.498
0.594
0.748
0.902
1.1
1.3
1.7
2.0
2.4
3.0
3.6
4.3
5.2
6.2
7.5
9.0
11
14
17
21
25
31
38
45
54
64
78
94
115
Test
frequency
25 MHz
25 MHz
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
7.6 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
Q min
@ L nom
27
27
30
30
35
35
40
40
40
40
40
45
45
27
27
27
27
27
27
27
27
27
27
27
27
20
20
20
20
20
20
20
20
20
20
20
20
DCR max
(Ohms)
0.124
0.124
0.151
0.151
0.176
0.198
0.248
0.271
0.291
0.317
0.333
0.368
0.396
0.412
0.466
0.544
0.595
0.898
1.04
1.12
1.38
1.42
1.49
1.65
2.42
2.75
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 7M2
75
Q-Factor
-331
50
-181
-102
-101
25
-332
-333
-104
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 112-2
Revised 11/21/02
© Coilcraft, Inc. 2007
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
Document 112-4
“Slot Seven” 7 mm Tunable Inductors
Typical Self Resonant Frequency
At nominal inductance
800
7M2
700
600
Frequency (MHz)
500
400
7M3
300
200
100
0
-101
-221
-331
-561
-102
-182
-332
-562
-103
-183
-333
-563
-104
Dash Number
Specifications subject to change without notice.
Please check our website for latest information.
Document 112-4
Revised 11/21/02
© Coilcraft, Inc. 2007
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