7M2/3

Document 112-1
“Slot Seven” 7 mm Tunable Inductors
This product will not be available in an RoHS-compliant
version. Core contains lead.
These versatile Coilcraft variable inductors operate over a
wide range of frequencies. Standard inductance values are
available from less than 100 nH to over 250 µH. Custom
values may also be available.
Coilcraft “Slot Seven” RF coils come in an international
7 mm package. Their precision-molded slotted bobbins
ensure tight tolerances and high stability.
All parts come with a metal can that provides electrostatic
shielding. The ferrite sleeve on the 7M3 series provides
higher inductances and additional magnetic shielding. “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.
0.300 max
7,62
Start
1
Finish
2
NC
0.460 ±0.008
11,68 ±0,20
0.138 ±0.040
3,51 ±1,02
3
0.300
max
7,62
0.039 ±0.008
0,99 ±0,20
Tuning
slug
Schematic
0.039
(5)
0,99
1
0.059
(2)
1,50
3
6
NC
Tab thickness
0.006 ±0.0004
0,15 ±0,010
4
NC
Bottom View
0.019 dia nom
0,48
0.177 ±0.005
4,50 ±0,13
1
0.0885 ref
2,248
0.177 ±0.005
4,50 ±0,13
0.0885 ref
2,248
0.285
ref
7,24
Can tab centers
Recommended
Board Layout
Dimensions are in
inches
mm
Terminations Pins: Tin-lead over tin over copper over iron
Shield can tabs: Tin-silver over nickel over brass
Weight
7M2 series
1.00 – 1.06 g
7M3 series
1.30 – 1.34 g
Resistance to soldering heat: Wave solder only. Recommended
maximum board surface temperature of 168°C (334°F) for no more
than three seconds. Pre-heating is recommended to minimize time
over the solder nozzle.
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 112-1 Revised 08/20/12
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 112-2
“Slot Seven” 7 mm Tunable Inductors
Series 7M2 — Shielded with Plastic Sleeve
Part Number
L min (µH)
L nom (µH)
L max (µH)
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
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
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
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
L and Q test
frequency
Q min
@ L nom
DCR max
(Ohms)
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
7.9 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
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
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
Q-Factor
75
-331
50
-102
-181
-101
-332
25
-333
-104
0
1
10
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.
100
Frequency (MHz)
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 112-2 Revised 08/20/12
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 112-3
“Slot Seven” 7 mm Tunable Inductors
Series 7M3 — Shielded with Ferrite Sleeve
Part number
L min (µH)
L nom (µH)
L max (µH)
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
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
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 and Q test
frequency
Q min
@ L nom
DCR max
(Ohms)
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
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
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
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
Parts in bold are included in Coilcraft Designer’s Kit M106.
Typical Q at L nom — Series 7M3
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.
Q-Factor
75
-332
50
-562
-683
25
-182
-102
-331
-151
-393
0
1
10
100
Frequency (MHz)
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 112-3 Revised 08/20/12
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 112-4
“Slot Seven” 7 mm Tunable Inductors
Typical Self Resonant Frequency
At nominal inductance
800
700
7M2
Frequency (MHz)
600
500
400
7M3
300
200
100
0
-101
-221
-331
-561
-102
-182
-332
-562
-103
-183
-333
-563
-104
Dash Number
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 112-4 Revised 08/20/12
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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