Air Core Inductors
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An Air Core Inductor does not depend upon a ferromagnetic material to achieve its specified inductance. Instead, it comprises windings coiled onto an insulator such as Bakelite, glass, or PTFE, with only air inside the coil.
One of the biggest advantages of an air core inductor is the minimal signal loss that occurs at higher magnetic field strengths. With ferromagnetic cores such as iron, the core can become magnetically saturated when the magnetic field is too strong. This leads to a loss in inductance, but an air core inductor has no such problem. An air core inductor can carry electromagnetic frequencies up to 1 GHz, but ferromagnetic core inductors tend to experience loss when the frequency exceeds 100 MHz.
Air core inductors 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.
Applications for Air Core Inductors
Sometimes non-linearity in the magnetization curve can be tolerated; for example, in switching converters. However, air core inductors are essential in circuits such as audio cross over networks in hi-fi speaker systems that must avoid distortion.
Most radio transmitters rely on air coils to prevent the production of harmonics. As well as their use in constructing RF tuning coils, Air Core Inductors are also found in filter circuits, snubber circuits, and high-frequency applications including TV and radio receivers.
Manufacturer Part No | Order Code | Description / Manufacturer | Availability | Price For |
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0806SQ-5N5GLC
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2286585 |
Air Core Inductor, Square, 5.5 nH, 2.9 A, 0806SQ Series, ± 2%, 0.0034 ohm, 4.9 GHz COILCRAFT
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5+ $3.97 ($4.57) 50+ $3.01 ($3.46) 250+ $2.05 ($2.36) 500+ $2.02 ($2.32) 1000+ $1.97 ($2.27) 2000+ $2.28 ($2.62) More Pricing... |
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5.5nH | 2.9A | 0806SQ Series | ± 2% | 0.0034ohm | 4.9GHz | 1.346mm | 1.829mm | 1.397mm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
0806SQ-5N5GLC
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2286585RL |
Air Core Inductor, Square, 5.5 nH, 2.9 A, 0806SQ Series, ± 2%, 0.0034 ohm, 4.9 GHz COILCRAFT
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5.5nH | 2.9A | 0806SQ Series | ± 2% | 0.0034ohm | 4.9GHz | 1.346mm | 1.829mm | 1.397mm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
A04TJLC
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2287176 |
Air Core Inductor, 12.5 nH, 4 A, Mini Spring, ± 5%, 0.0034 ohm, 3.3 GHz COILCRAFT
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1+ $2.83 ($3.25) 10+ $2.15 ($2.47) 50+ $1.47 ($1.69) 100+ $1.45 ($1.67) 200+ $1.42 ($1.63) 250+ $2.51 ($2.89) 700+ $1.75 ($2.01) 1400+ $1.62 ($1.86) More Pricing... |
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12.5nH | 4A | Mini Spring | ± 5% | 0.0034ohm | 3.3GHz | 3.94mm | 4.45mm | 3.15mm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
A04TJLC
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2287176RL |
Air Core Inductor, 12.5 nH, 4 A, Mini Spring, ± 5%, 0.0034 ohm, 3.3 GHz COILCRAFT
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12.5nH | 4A | Mini Spring | ± 5% | 0.0034ohm | 3.3GHz | 3.94mm | 4.45mm | 3.15mm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
0807SQ-10NGLC
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2286590 |
Air Core Inductor, Square, 10.2 nH, 2.7 A, 0807SQ Series, ± 2%, 0.007 ohm, 4 GHz COILCRAFT
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10.2nH | 2.7A | 0807SQ Series | ± 2% | 0.007ohm | 4GHz | 1.625mm | 1.829mm | 1.524mm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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1515SQ-68NGEC
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2286990 |
Air Core Inductor, Square, 68 nH, 5.5 A, 1515SQ, ± 2%, 0.0086 ohm, 2.13 GHz COILCRAFT
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68nH | 5.5A | 1515SQ | ± 2% | 0.0086ohm | 2.13GHz | 5.33mm | 3.56mm | 3.73mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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A02TJLC
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2287174 |
Air Core Inductor, 5 nH, 4 A, Mini Spring, ± 5%, 0.0018 ohm, 6.5 GHz COILCRAFT
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5nH | 4A | Mini Spring | ± 5% | 0.0018ohm | 6.5GHz | 3.94mm | 4.45mm | 3.15mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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0908SQ-27NGLC
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2286605 |
Air Core Inductor, Square, 27.3 nH, 4.4 A, 0908SQ Series, ± 2%, 0.01 ohm, 3.2 GHz COILCRAFT
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27.3nH | 4.4A | 0908SQ Series | ± 2% | 0.01ohm | 3.2GHz | 2.972mm | 2.134mm | 1.829mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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2222SQ-161GEC
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2287143 |
Air Core Inductor, Square, 160 nH, 5.7 A, 2222SQ, ± 2%, 0.00825 ohm, 1 GHz COILCRAFT
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160nH | 5.7A | 2222SQ | ± 2% | 0.00825ohm | 1GHz | 7.37mm | 5.59mm | 5.69mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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132-17SMGLD
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2286972 |
Air Core Inductor, 380 nH, 2.5 A, Maxi Spring, ± 2%, 0.05 ohm, 590 MHz COILCRAFT
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380nH | 2.5A | Maxi Spring | ± 2% | 0.05ohm | 590MHz | 10.55mm | 6.1mm | 5.97mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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2929SQ-331GEC
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2287164 |
Air Core Inductor, Square, 330 nH, 4.7 A, 2929SQ, ± 5%, 0.0125 ohm, 660 MHz COILCRAFT
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330nH | 4.7A | 2929SQ | ± 5% | 0.0125ohm | 660MHz | 10.29mm | 7.49mm | 7.24mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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132-20SMGLB
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2286975 |
Air Core Inductor, 538 nH, 2 A, Maxi Spring, ± 2%, 0.09 ohm, 490 MHz COILCRAFT
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538nH | 2A | Maxi Spring | ± 2% | 0.09ohm | 490MHz | 10.55mm | 6.1mm | 5.97mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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1812SMS-22NGLC
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2287116 |
Air Core Inductor, 22 nH, 3 A, Midi Spring, ± 2%, 0.0042 ohm, 3.2 GHz COILCRAFT
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22nH | 3A | Midi Spring | ± 2% | 0.0042ohm | 3.2GHz | 4.95mm | 3.56mm | 4.2mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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1111SQ-43NJEC
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2343753 |
Air Core Inductor, Square, 43 nH, 4.4 A, 1111SQ, ± 5%, 0.01 ohm, 2.2 GHz COILCRAFT
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43nH | 4.4A | 1111SQ | ± 5% | 0.01ohm | 2.2GHz | 3.3mm | 2.67mm | 2.79mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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2929SQ-331GEC
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2287164RL |
Air Core Inductor, Square, 330 nH, 4.7 A, 2929SQ, ± 5%, 0.0125 ohm, 660 MHz COILCRAFT
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330nH | 4.7A | 2929SQ | ± 5% | 0.0125ohm | 660MHz | 10.29mm | 7.49mm | 7.24mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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1111SQ-47NGEC
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2343755 |
Air Core Inductor, Square, 47 nH, 4.4 A, 1111SQ, ± 2%, 0.0113 ohm, 2.2 GHz COILCRAFT
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47nH | 4.4A | 1111SQ | ± 2% | 0.0113ohm | 2.2GHz | 3.3mm | 2.67mm | 2.79mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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0908SQ-27NGLC
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2286605RL |
Air Core Inductor, Square, 27.3 nH, 4.4 A, 0908SQ Series, ± 2%, 0.01 ohm, 3.2 GHz COILCRAFT
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27.3nH | 4.4A | 0908SQ Series | ± 2% | 0.01ohm | 3.2GHz | 2.972mm | 2.134mm | 1.829mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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2929SQ-501GEC
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2287163 |
Air Core Inductor, Square, 500 nH, 4.3 A, 2929SQ, ± 2%, 0.0165 ohm, 485 MHz COILCRAFT
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500nH | 4.3A | 2929SQ | ± 2% | 0.0165ohm | 485MHz | 14mm | 7.49mm | 7.24mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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1212VS-22NMEB
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2343762 |
Air Core Inductor, High Current, 22 nH, 57 A, 1212VS, ± 20%, 550 µohm, 918 MHz COILCRAFT
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22nH | 57A | 1212VS | ± 20% | 550µohm | 918MHz | 12mm | 11.5mm | 6.6mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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A01TKLC
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2287178 |
Air Core Inductor, 2.5 nH, 4 A, Mini Spring, ± 10%, 0.0011 ohm, 12.5 GHz COILCRAFT
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2.5nH | 4A | Mini Spring | ± 10% | 0.0011ohm | 12.5GHz | 3.94mm | 4.45mm | 3.15mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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A01TKLC
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2287178RL |
Air Core Inductor, 2.5 nH, 4 A, Mini Spring, ± 10%, 0.0011 ohm, 12.5 GHz COILCRAFT
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2.5nH | 4A | Mini Spring | ± 10% | 0.0011ohm | 12.5GHz | 3.94mm | 4.45mm | 3.15mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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744918254
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3812926 |
Air Core Inductor, 538 nH, 2 A, WE-CAIR, ± 5%, 0.09 ohm, 490 MHz WURTH ELEKTRONIK
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538nH | 2A | WE-CAIR | ± 5% | 0.09ohm | 490MHz | 10.55mm | 6.35mm | 5.9mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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2222SQ-90NGEB
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2287140 |
Air Core Inductor, Square, 90 nH, 5 A, 2222SQ, ± 2%, 0.0055 ohm, 1.15 GHz COILCRAFT
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90nH | 5A | 2222SQ | ± 2% | 0.0055ohm | 1.15GHz | 5.21mm | 5.46mm | 5.69mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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B06TGLC
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2287179 |
Air Core Inductor, 17.5 nH, 4 A, Mini Spring, ± 2%, 0.0045 ohm, 2.2 GHz COILCRAFT
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17.5nH | 4A | Mini Spring | ± 2% | 0.0045ohm | 2.2GHz | 6.86mm | 2.79mm | 3.15mm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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132-19SMGLD
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2286974 |
Air Core Inductor, 491 nH, 2 A, Maxi Spring, ± 2%, 0.065 ohm, 535 MHz COILCRAFT
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491nH | 2A | Maxi Spring | ± 2% | 0.065ohm | 535MHz | 10.55mm | 6.1mm | 5.97mm |