Square Air Core Inductors‌

Product Overview

Our Square Air Core Inductors (SMAR Series) deliver exceptional high-frequency performance in ultra-compact SMD packages. Engineered with precision-wound non-magnetic construction, these true Air Core Inductor components eliminate magnetic saturation and core losses, making them superior to ferrite-core alternatives in critical RF applications. The square geometry ensures optimal PCB space utilization and mechanical stability during automated assembly.

Key Features & Specifications

• Ultra-Miniature SMD Design: Dimensions as small as 1.35×1.83mm with flat top/bottom for reliable pick-and-place.
• High Q-Factor (up to 130): Minimizes signal loss in resonant circuits, outperforming standard RF Inductor solutions.
• Wide Inductance Range: 5.5nH to 27.3nH with tight tolerances (±2% or ±5%).
• High Self-Resonant Frequency (SRF): Up to 5.2GHz for stable VHF/UHF operation.
• Robust Current Handling: Supports up to 4.4A RMS (20°C temperature rise).
• Ag-Solder Coated Leads: Ensures reliable solder joints in high-volume production.
• Extended Temperature Range: Operates from -40°C to +125°C with inductance TC of +5~70ppm/°C.

Technical Advantages

Unlike traditional Power Inductor or Transformers, these square Air Core Inductor components achieve zero core losses and minimal DCR (as low as 3.4mΩ). The optimized winding geometry reduces parasitic capacitance by 30% compared to cylindrical coils, enabling superior performance in noise-sensitive Sensor interfaces and EMC Filter networks. UV-resistant insulation guarantees long-term reliability in harsh environments.

Typical Applications

• RF Front-End Modules: Antenna matching networks, transceiver stages, and 5G infrastructure.
• Broadband Filtering: Critical decoupling elements in multi-band systems requiring high SRF.
• Medical/Test Equipment: MRI signal processing and precision Sensor arrays.
• Satellite Communications: Low-loss impedance matching in LNB circuits.
• Automotive Electronics: ADAS radar and infotainment systems paired with EMC Filter solutions.
• IoT Devices: Compact RF power amplifiers and wireless charging circuits.

For EMI-sensitive designs, combine with our RF Inductor and EMC Filter product lines to achieve full FCC/CE compliance.

Quality & Reliability

• 100% Automated Testing: Inductance measured at 400MHz using certified LCR meters.
• Solder Heat Resistance: Withstands 3× reflow cycles at 260°C.
• RoHS/REACH Compliant: Eco-friendly construction.
• Tape-and-Reel Packaging: 7" (2000pcs) or 13" (7500pcs) reels for automated assembly.

Series in this family