Air Core RF SMD Inductors
RF SMD Inductors Flat Top Air Core
| AM
Tokenchina's state-of-the-art equipment allows our engineers to design and manufacture the highest quality air core inductor coils using precise specifications. Air core inductors experience no core loss. The inductor is an excellent solution to your switch mode magnetic need when high frequency and high linearity is desired. The Advantages of an Air Core Inductor (coils)Its inductance is unaffected by the current it carries. This contrasts with the situation with coils using ferromagnetic cores whose inductance tends to reach a peak at moderate field strengths before dropping towards zero as saturation approaches. Sometimes non-linearity in the magnetization curve can be tolerated; for example in switching converters. In circuits such as audio cross over networks in Hi-Fi speaker systems you must avoid distortion; then you need an air coil. Most radio transmitters rely on air coils to prevent the production of harmonics. Air coils are also free of the 'iron losses' which affect ferromagnetic cores. As frequency is increased this advantage becomes progressively more important. You obtain better Q-factor, greater efficiency, greater power handling, and less distortion. Lastly, air coils can be designed to perform at frequencies as high as 1 Ghz. Most ferromagnetic cores tend to be rather lossy above 100 MHz. The Flat Top Air Core AM Inductors are lead-free and RoHS compliant. Please contact us for details with your specific needs. Features
Applications
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SMD Air Core Dimensions (unit: mm) - 0603, 0805, 1008
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| Type | A (max) | B (max) | C ± 0.2 |
| TRAM0603 | 1.80 | 2.00 | 2.00 |
| TRAM0805 | 1.80 | 2.10 | 2.85 |
| TRAM1008 | 1.90 | 2.20 | 3.20 |
SMD Air Core Dimensions (unit: mm) - 2215, 4015, 132
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| Type | A | B | C | D | E |
| TRAM2215 | 2.2 ± 0.3 | 1.4 ± 0.2 | 1.4 ± 0.2 | 1.8 ± 0.3 | 0.9 ± 0.3 |
| TRAM4015 | 4.0 ± 0.3 | 1.4 ± 0.2 | 1.4 ± 0.2 | 3.5 ± 0.3 | 0.9 ± 0.3 |
| TRAM132 | 9.0(max) | 4.4 ± 0.3 | 4.6 ± 0.4 | 8.0 ± 0.5 | 1.3 ± 0.4 |
SMD Air Core Dimensions (unit: mm) - 3730, 7030
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| Type | A ± 0.3 | B ± 0.2 | C ± 0.2 | D ± 0.3 | E ± 0.2 |
| TRAM3730 | 3.30 | 2.60 | 2.70 | 2.90 | 0.70 |
| TRAM7030 | 6.30 | 3.60 | 3.70 | 5.80 | 0.70 |
SMD Air Core Dimensions (unit: mm) - 1812
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| Type | A ± 0.3 | B ± 0.2 | C ± 0.2 | D ± 0.4 | E ± 0.3 |
| TRAM1812 | 4.90 | 3.50 | 3.50 | 4.30 | 1.00 |
Electrical Characteristics - TRAM0603 SMD Air Core
| Part Number | Inductance (L)(nH) |
Q (min) |
Test Freq. (MHz) |
SRF (MHz)(min) |
DCR (mΩ)(max) |
IDC (mA)(max) |
| TRAM0603 - 3N9K | 3.9 | 80 | 300 | >3000 | 3.0 | 950 |
| TRAM0603 - 4N7K | 4.7 | 80 | 300 | >3000 | 3.6 | 900 |
| TRAM0603 - 5N6K | 5.6 | 80 | 300 | >3000 | 3.8 | 950 |
| TRAM0603 - 6N8K | 6.8 | 80 | 300 | >3000 | 4.5 | 900 |
| TRAM0603 - 8N2K | 8.2 | 80 | 300 | >3000 | 5.3 | 840 |
| TRAM0603 - 10NK | 10.0 | 70 | 300 | >3000 | 6.9 | 600 |
| TRAM0603 - 12NK | 12.0 | 70 | 300 | >3000 | 8.3 | 600 |
| TRAM0603 - 15NK | 15.0 | 70 | 300 | 2500 | 11.5 | 500 |
| TRAM0603 - 18NK | 18.0 | 70 | 300 | 2500 | 12.8 | 500 |
| TRAM0603 - 22NK | 22.0 | 70 | 300 | 2400 | 11.3 | 550 |
| TRAM0603 - 27NK | 27.0 | 70 | 300 | 1600 | 17.0 | 500 |
| TRAM0603 - 33NK | 33.0 | 70 | 300 | 1600 | 26.9 | 320 |
| TRAM0603 - 39NK | 39.0 | 70 | 300 | 1500 | 30.7 | 320 |
| TRAM0603 - 47NK | 47.0 | 70 | 300 | 1500 | 34.5 | 320 |
| TRAM0603 - 56NK | 56.0 | 70 | 300 | 1300 | 38.4 | 320 |
Electrical Characteristics - TRAM0805 SMD Air Core
| Part Number | Inductance (L)(nH) |
Q (min) |
Test Freq. (MHz) |
SRF (MHz)(min) |
DCR (mΩ)(max) |
IDC (mA)(max) |
| TRAM0805 - 3N9K | 3.9 | 80 | 300 | >3000 | 2.6 | 1200 |
| TRAM0805 - 4N7K | 4.7 | 80 | 300 | >3000 | 3.6 | 900 |
| TRAM0805 - 5N6K | 5.6 | 80 | 300 | >3000 | 3.7 | 950 |
| TRAM0805 - 6N8K | 6.8 | 80 | 300 | >3000 | 4.5 | 900 |
| TRAM0805 - 8N2K | 8.2 | 80 | 300 | >3000 | 5.3 | 840 |
| TRAM0805 - 10NK | 10.0 | 70 | 300 | >3000 | 5.4 | 900 |
| TRAM0805 - 12NK | 12.0 | 70 | 300 | >3000 | 6.3 | 900 |
| TRAM0805 - 15NK | 15.0 | 70 | 300 | 2500 | 7.2 | 900 |
| TRAM0805 - 18NK | 18.0 | 70 | 300 | 2500 | 12.5 | 500 |
| TRAM0805 - 22NK | 22.0 | 70 | 300 | 2400 | 12.9 | 550 |
| TRAM0805 - 27NK | 27.0 | 70 | 300 | 1600 | 14.5 | 550 |
| TRAM0805 - 33NK | 33.0 | 70 | 300 | 1600 | 18.7 | 500 |
| TRAM0805 - 39NK | 39.0 | 70 | 300 | 1500 | 25.7 | 380 |
| TRAM0805 - 47NK | 47.0 | 70 | 300 | 1500 | 34.5 | 320 |
| TRAM0805 - 56NK | 56.0 | 70 | 300 | 1300 | 38.4 | 320 |
| TRAM0805 - 68NK | 68.0 | 70 | 300 | 1300 | 42.2 | 320 |
Electrical Characteristics - TRAM1008 SMD Air Core
| Part Number | Inductance (L)(nH) |
Q (min) |
Test Freq. (MHz) |
SRF (MHz)(min) |
DCR (mΩ)(max) |
IDC (mA)(max) |
| TRAM1008 - 6N8K | 6.8 | 80 | 300 | >3000 | 4.0 | 1200 |
| TRAM1008 - 8N2K | 8.2 | 80 | 300 | >3000 | 5.0 | 950 |
| TRAM1008 - 10NK | 10.0 | 70 | 300 | >3000 | 6.0 | 950 |
| TRAM1008 - 12NK | 12.0 | 70 | 300 | >3000 | 6.5 | 900 |
| TRAM1008 - 15NK | 15.0 | 70 | 300 | 2500 | 7.3 | 900 |
| TRAM1008 - 18NK | 18.0 | 70 | 300 | 2500 | 9.6 | 840 |
| TRAM1008 - 22NK | 22.0 | 70 | 300 | 2400 | 10.8 | 840 |
| TRAM1008 - 27NK | 27.0 | 70 | 300 | 1600 | 13.9 | 600 |
| TRAM1008 - 33NK | 33.0 | 70 | 300 | 1600 | 19.5 | 500 |
| TRAM1008 - 39NK | 39.0 | 70 | 300 | 1500 | 21.6 | 500 |
| TRAM1008 - 47NK | 47.0 | 70 | 300 | 1500 | 25.2 | 470 |
| TRAM1008 - 56NK | 56.0 | 70 | 300 | 1300 | 27.5 | 470 |
| TRAM1008 - 68NK | 68.0 | 70 | 300 | 1300 | 37.1 | 380 |
| TRAM1008 - 82NK | 82.0 | 70 | 300 | 1000 | 51.5 | 320 |
| TRAM1008 - R10K | 100.0 | 70 | 300 | 1000 | 55.5 | 320 |
| TRAM1008 - R12K | 120.0 | 70 | 300 | 950 | 63.4 | 320 |
Electrical Characteristics - TRAM2215 SMD Air Core
| Part Number | Turns | Inductance (L)(nH) |
Q (min) |
Test Freq. (MHz) |
SRF (GHz)(min) |
| TRAM2215 - 02 | 2 | 1.65 ± 10% | 100 | 800 | >3.0 |
| TRAM2215 - 03 | 3 | 2.55 ± 10% | 100 | 800 | >3.0 |
| TRAM2215 - 04 | 4 | 3.85 ± 10% | 100 | 800 | >3.0 |
| TRAM2215 - 05 | 5 | 5.45 ± 5% | 100 | 800 | >3.0 |
Electrical Characteristics - TRAM4015 SMD Air Core
| Part Number | Turns | Inductance (L)(nH) |
Q (min) |
Test Freq. (MHz) |
SRF (GHz)(min) |
| TRAM4015 - 06 | 6 | 5.60 ± 5% | 100 | 800 | >3.0 |
| TRAM4015 - 07 | 7 | 7.15 ± 5% | 100 | 800 | >3.0 |
| TRAM4015 - 08 | 8 | 8.80 ± 5% | 100 | 800 | >3.0 |
| TRAM4015 - 09 | 9 | 9.85 ± 5% | 100 | 800 | >3.0 |
| TRAM4015 - 10 | 10 | 12.55 ± 5% | 100 | 800 | >3.0 |
Electrical Characteristics - TRAM132 SMD Air Core
| Part Number | Turns | Inductance (L)(nH) |
Q (min) |
Test Freq. (MHz) |
SRF (GHz)(min) |
| TRAM132 - 09 | 9 | 90 ± 5% | 100 | 50 | >1.0 |
| TRAM132 - 10 | 10 | 111 ± 5% | 100 | 50 | >1.0 |
| TRAM132 - 11 | 11 | 130 ± 5% | 100 | 50 | >0.9 |
| TRAM132 - 12 | 12 | 169 ± 5% | 100 | 50 | >0.8 |
| TRAM132 - 13 | 13 | 206 ± 5% | 100 | 50 | >0.7 |
| TRAM132 - 14 | 14 | 222 ± 5% | 100 | 50 | >0.6 |
| TRAM132 - 15 | 15 | 246 ± 5% | 100 | 50 | >0.6 |
| TRAM132 - 16 | 16 | 307 ± 5% | 100 | 50 | >0.5 |
| TRAM132 - 17 | 17 | 380 ± 5% | 100 | 50 | >0.5 |
| TRAM132 - 18 | 18 | 422 ± 5% | 100 | 50 | >0.4 |
| TRAM132 - 19 | 19 | 491 ± 5% | 100 | 50 | >0.4 |
| TRAM132 - 20 | 20 | 538 ± 5% | 100 | 50 | >0.4 |
Electrical Characteristics - TRAM3730 SMD Air Core
| Part Number | Turns | Inductance (L)(nH) |
Q (min) |
Test Freq. (MHz) |
SRF (GHz)(min) |
| TRAM3730 - A01T | 1 | 2.5 ± 10% | 145 | 150 | >3.0 |
| TRAM3730 - A02T | 2 | 5.0 ± 10% | 140 | 150 | >3.0 |
| TRAM3730 - A03T | 3 | 8.0 ± 10% | 140 | 150 | >3.0 |
| TRAM3730 - A04T | 4 | 12.5 ± 5% | 137 | 150 | >3.0 |
| TRAM3730 - A05T | 5 | 18.5 ± 5% | 132 | 150 | >2.5 |
Electrical Characteristics - TRAM7030 SMD Air Core
| Part Number | Turns | Inductance (L)(nH) |
Q (min) |
Test Freq. (MHz) |
SRF (GHz)(min) |
| TRAM7030 - B06T | 6 | 17.5 ± 5% | 100 | 150 | >2.2 |
| TRAM7030 - B07T | 7 | 22.0 ± 5% | 100 | 150 | >2.0 |
| TRAM7030 - B08T | 8 | 28.0 ± 5% | 100 | 150 | >1.8 |
| TRAM7030 - B09T | 9 | 35.5 ± 5% | 100 | 150 | >1.2 |
| TRAM7030 - B10T | 10 | 43.5 ± 5% | 100 | 150 | >1.0 |
Electrical Characteristics - TRAM1812 SMD Air Core
| Part Number | Inductance (L)(nH) |
Q (min) |
Test Freq. (MHz) |
SRF (GHz)(min) |
| TRAM1812 - 22NK | 22 | 100 | 150 | 3.20 |
| TRAM1812 - 27NK | 27 | 100 | 150 | 2.70 |
| TRAM1812 - 33NK | 33 | 100 | 150 | 2.50 |
| TRAM1812 - 39NJ | 39 | 100 | 150 | 2.10 |
| TRAM1812 - 47NJ | 47 | 100 | 150 | 2.10 |
| TRAM1812 - 56NJ | 56 | 100 | 150 | 1.50 |
| TRAM1812 - 68NJ | 68 | 100 | 150 | 1.50 |
| TRAM1812 - 82NJ | 82 | 100 | 150 | 1.30 |
| TRAM1812 - R10J | 100 | 100 | 150 | 1.20 |
| TRAM1812 - R12J | 120 | 100 | 150 | 1.10 |
How to Order - Air Core RF Inductors - TRAM0603, TRAM0805, TRAM1008
| TRAM | 1008 | - | 6N8 | K | ||||||||||||||||||||||||
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How to Order - Air Core RF Inductors - TRAM2215, TRAM4015, TRAM132
| TRAM | 2215 | - | 02 | ||||||||||||
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How to Order - Air Core RF Inductors - TRAM3730, TRAM7030
| TRAM | 3730 | - | A01T | ||||||||||
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How to Order - Air Core RF Inductors - TRAM1812
| TRAM | 1812 | - | 22N | K | ||||||||||||||||||
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