2222SQ-301GEB COILCRAFT Inductor (Other) In Stock
Coilcraft 2222SQ-301GEB is a 0.3 µH air-core RF inductor in a rectangular 4723 SMD case with 0.0138 Ω DC resistance. Its air-core construction delivers high Q-factor and excellent frequency stability for RF filtering and impedance matching circuits. Ideal for VHF/UHF filters, RF matching networks, and high-frequency switching converter output stages.
- Manufacturer
- COILCRAFT
- Package
- Other
- Pin Count
- 2
- Lifecycle
- OBSOLETE
- Datasheet
- 2222SQ-301GEB Datasheet PDF
- Category
- Inductor
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 0.3 µH air-core construction provides high Q-factor with no magnetic saturation, enabling linear RF operation at high currents
- Ultra-low 0.0138 Ω DC resistance minimizes power loss in high-current RF and power conversion applications
- Rectangular 4723 SMD form factor supports automated pick-and-place assembly in compact RF front-end and power module designs
Applications
The 2222SQ-301GEB is designed for RF impedance matching networks, VHF/UHF bandpass filters, and high-frequency DC-DC converter output chokes where air-core inductance of 0.3 µH and low DCR are essential. Its air-core structure avoids core saturation, making it suitable for pulsed RF transmitters and high-current switching nodes. The SMD package enables integration into compact RF front-end boards, antenna matching circuits, and power amplifier output networks.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Case/Size Code | 4723 |
| Construction | Rectangular |
| Core Material | AIR |
| DC Resistance | 0.0138Ω |
| Inductance-Nom (L) | 0.3 µH |
| Inductor Application | RF INDUCTOR |
| Inductor Type | GENERAL PURPOSE INDUCTOR |
| JESD-609 Code | e2 |
| Number of Functions | 1 |
| Package Height | 5.69mm |
| Package Length | 11.94mm |
| Package Style | SMT |
| Package Width | 5.72mm |
| Packing Method | TR |
| Rated Current-Max | 3.7A |
| Self Resonance Frequency | 720MHz |
| Shape/Size Description | RECTANGULAR PACKAGE |
| Shielded | NO |
| Surface Mount | YES |
| Terminal Finish | Tin/Silver (Sn96.5Ag3.5) |
| Terminal Placement | DUAL ENDED |
| Terminal Shape | WIRE |
| Test Frequency | 50MHz |
| Tolerance | 2% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8504.50.80.00 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What inductance and DCR values does the 2222SQ-301GEB offer, and why does a low DCR of 0.0138 Ω matter in a high-current RF circuit?
The 2222SQ-301GEB provides 0.3 µH inductance with a DC resistance of only 0.0138 Ω. In a high-current RF choke or switching converter output filter carrying 5 A, this low DCR limits I²R conduction loss to under 0.35 mW, preserving efficiency. Air-core construction also eliminates core saturation, keeping inductance stable across the full current range without the roll-off seen in ferrite-core inductors above a few amperes.
In which RF transmitter or receiver front-end applications is the 2222SQ-301GEB most commonly designed in?
The 2222SQ-301GEB is commonly used in VHF and UHF bandpass filter networks, impedance matching circuits for power amplifier outputs, and antenna tuning networks operating between 30 MHz and 500 MHz. Its 0.3 µH air-core construction resonates with capacitors in the 1 pF to 30 pF range across this frequency band, making it a practical choice for broadcast transmitters, two-way radio front-ends, and IoT sub-GHz transceiver matching stages.
When procuring the 2222SQ-301GEB, are there pin-compatible Coilcraft alternatives for designs requiring a higher inductance value or tighter tolerance?
Designers needing a higher inductance in the same 4723 SMD footprint can consider Coilcraft's 2222SQ series in 0.47 µH or 1 µH values, which share identical case dimensions and pad layouts for drop-in replacement. For tighter inductance tolerance than the standard G grade (±2%), Coilcraft offers tighter-tolerance variants in the same series. Lead times from authorized distributors typically run 4 to 8 weeks for volume orders of 1000 pieces or more.
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