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"Slot Seven" Tunable Inductors

This product will not be available in an RoHS-compliant version. Core contains lead.
  • Versatile inductors operate over a wide frequency range
  • Standard values from less than 100 nH to over 250 µH
  • Precision molded slotted bobbins ensure tight tolerance 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.
  • Ferrite tuning cores with slotted hole for easy, positive adjustment
  • The Slot tuner was designed specifically to adjust this inductor
  • Samples of 39 values are available in Coilcraft Designer's Kit M106

SPECIFICATIONS


Series 7M2 – Shielded with plastic sleeve

Part number
Click for samples
Inductance
min  (µH)
Inductance
nom (µH)
Inductance
max (µH)
Test
frequency
Q min
at L nom
DCR max1
(Ohms)
7M2-101 0.094 0.10 0.106 25 MHz 27 0.124
7M2-121 0.113 0.12 0.127 25 MHz 27 0.124
7M2-151 0.141 0.15 0.159 25 MHz 30 0.151
7M2-181 0.169 0.18 0.191 25 MHz 30 0.151
7M2-221 0.207 0.22 0.233 25 MHz 35 0.176
7M2-271 0.254 0.27 0.286 25 MHz 35 0.198
7M2-331 0.310 0.33 0.35 25 MHz 40 0.248
7M2-391 0.367 0.39 0.413 25 MHz 40 0.271
7M2-471 0.442 0.47 0.498 25 MHz 40 0.291
7M2-561 0.526 0.56 0.594 25 MHz 40 0.317
7M2-681 0.612 0.68 0.748 25 MHz 40 0.333
7M2-821 0.738 0.82 0.902 25 MHz 45 0.368
7M2-102 0.90 1.0 1.1 25 MHz 45 0.396
7M2-122 1.1 1.2 1.3 7.9 MHz 27 0.412
7M2-152 1.4 1.5 1.7 7.9 MHz 27 0.466
7M2-182 1.6 1.8 2.0 7.9 MHz 27 0.544
7M2-222 2.0 2.2 2.4 7.9 MHz 27 0.595
7M2-272 2.4 2.7 3.0 7.9 MHz 27 0.898
7M2-332 3.0 3.3 3.6 7.9 MHz 27 1.04
7M2-392 3.5 3.9 4.3 7.9 MHz 27 1.12
7M2-472 4.2 4.7 5.2 7.9 MHz 27 1.38
7M2-562 5.0 5.6 6.2 7.9 MHz 27 1.42
7M2-682 6.1 6.8 7.5 7.9 MHz 27 1.49
7M2-822 7.4 8.2 9 7.9 MHz 27 1.65
7M2-103 9.0 10 11 7.9 MHz 27 2.42
7M2-123 10 12 14 2.5 MHz 20 2.75
7M2-153 13 15 17 2.5 MHz 20 3.71
7M2-183 15 18 21 2.5 MHz 20 4.01
7M2-223 19 22 25 2.5 MHz 20 7.37
7M2-273 23 27 31 2.5 MHz 20 8.48
7M2-333 28 33 38 2.5 MHz 20 13.34
7M2-393 33 39 45 2.5 MHz 20 14.72
7M2-473 40 47 54 2.5 MHz 20 16.42
7M2-563 48 56 64 2.5 MHz 20 17.76
7M2-683 58 68 78 2.5 MHz 20 19.76
7M2-823 70 82 94 2.5 MHz 20 22.01
7M2-104 85 100 115 2.5 MHz 20 24.25
1 DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
2 All readings taken on Agilent/HP 4342-A Q meter.
3 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.
4 All specifications are at standard Q meter frequencies. L and Q readings change with frequency.
5 Shielded parts have a sleeve insert to protect the winding.
6 Operating temperature range -40°C to +85°C.
7 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

Series 7M3 – Shielded with ferrite sleeve

Part number
Click for samples
Inductance
min  (µH)
Inductance
nom (µH)
Inductance
max (µH)
Test
frequency
Q min
at L nom
DCR max1
(Ohms)
7M3-151 0.128 0.15 0.173 25 MHz 40 0.124
7M3-181 0.153 0.18 0.207 25 MHz 45 0.124
7M3-221 0.187 0.22 0.253 25 MHz 45 0.151
7M3-271 0.230 0.27 0.311 25 MHz 50 0.151
7M3-331 0.281 0.33 0.38 25 MHz 50 0.151
7M3-391 0.332 0.39 0.449 25 MHz 55 0.176
7M3-471 0.400 0.47 0.541 25 MHz 55 0.198
7M3-561 0.476 0.56 0.644 25 MHz 60 0.198
7M3-681 0.544 0.68 0.816 25 MHz 60 0.248
7M3-821 0.656 0.82 0.984 25 MHz 60 0.271
7M3-102 0.80 1.0 1.2 25 MHz 60 0.317
7M3-122 1.0 1.2 1.4 7.9 MHz 45 0.333
7M3-152 1.2 1.5 1.8 7.9 MHz 45 0.368
7M3-182 1.4 1.8 2.2 7.9 MHz 45 0.396
7M3-222 1.8 2.2 2.6 7.9 MHz 45 0.412
7M3-272 2.2 2.7 3.2 7.9 MHz 45 0.466
7M3-332 2.6 3.3 4.0 7.9 MHz 40 0.544
7M3-392 3.1 3.9 4.7 7.9 MHz 40 0.595
7M3-472 3.8 4.7 5.6 7.9 MHz 40 0.898
7M3-562 4.5 5.6 6.7 7.9 MHz 40 1.04
7M3-682 5.4 6.8 8.2 7.9 MHz 35 1.04
7M3-822 6.6 8.2 9.8 7.9 MHz 35 1.12
7M3-103 8.0 10 12 7.9 MHz 35 1.38
7M3-123 9.0 12 15 2.5 MHz 35 1.49
7M3-153 11 15 19 2.5 MHz 35 1.65
7M3-183 14 18 23 2.5 MHz 35 2.42
7M3-223 17 22 28 2.5 MHz 35 2.75
7M3-273 20 27 34 2.5 MHz 40 3.71
7M3-333 25 33 41 2.5 MHz 40 3.71
7M3-393 29 39 49 2.5 MHz 40 4.01
7M3-473 35 47 59 2.5 MHz 40 7.37
7M3-563 42 56 70 2.5 MHz 40 8.48
7M3-683 51 68 85 2.5 MHz 40 13.34
7M3-823 62 82 103 2.5 MHz 40 14.72
7M3-104 75 100 125 2.5 MHz 40 16.42
7M3-124 90 120 150 2.5 MHz 40 17.76
7M3-154 113 150 188 2.5 MHz 40 19.76
7M3-184 135 180 225 2.5 MHz 40 22.01
7M3-224 165 220 275 2.5 MHz 40 24.25
1 DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
2 All readings taken on an Agilent/HP 4342-A Q meter.
3 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.
4 All specifications are at standard Q meter frequencies. L and Q readings change with frequency.
5 Shielded parts have a sleeve insert to protect the winding.
6 Operating temperature range −40°C to +85°C.
7 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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Updated: November 22, 2016