Mini Spring™ Air Core Inductors Data Sheet

Category: Coilcraft Inc, Electronics, Inductors

Overview

Coilcraft’s Mini Spring™ Air Core Inductors are designed for surface mount applications and are characterized by their very high Q over a wide frequency range. These inductors are encapsulated with a high-temperature material, which assures mechanical stability, maintains very tight inductance tolerances, and creates a flat top suitable for automatic placement and various soldering processes including reflow or vapor phase. The leads are solder-coated to facilitate reliable soldering.

Product Variants and Packaging

These inductors come in a variety of part numbers with varying inductance values ranging from 2.5 nH to 43.0 nH and tolerances of 10%, 5%, or 2%. They are grouped into two sizes: A and B, with standard EIA tape and reel packaging with 12 mm tape for size A parts and 16 mm tape for size B parts. Coilcraft offers a Designer’s Kit C102 containing samples of the 5% inductance tolerance parts, and there are available kits with 2% tolerance as well.

Electrical Specifications

The inductors feature an operating temperature range of -40°C to +125°C and are tested across various parameters such as test frequency (MHz), Self-Resonant Frequency (SRF) minimum (GHz), DC Resistance (DCR) maximum (mOhm), maximum RMS current (Irms) in A, and weight in mg. Their respective test frequency is fixed at 150 MHz, whereas the SRF minimum ranges from 12.5 GHz to 2.5 GHz. The list of available part numbers includes AO1T to B10T, reflecting the differences in inductance, tolerance, Q minimum, and number of turns.

Ordering Information and Compliance

When ordering these inductors, customers must specify the tolerance code including T for 2%, J for 5%, and K for 10%. Some tolerance variants are available for immediate shipment, and these are highlighted in bold within the data provided. Moreover, these inductors are RoHS compliant, catering to environmental standards.

Additional Information

The document cites various instruments and fixtures used for testing such as the Agilent/HP 4286 with Coilcraft SMD-A fixture, Agilent/HP 4291A with Agilent/HP 16193 test fixture, and the Agilent/HP 8720D with the SMD-D test fixture. It also mentions that DC resistance is tested using the Cambridge Technology Model 510 Micro-ohmmeter. Customers can expect an average current rating for a temperature rise of 15°C above a 25°C ambient level.

Contact Information

The document provides Coilcraft’s address in Cary, Illinois, with phone and fax numbers, an email for inquiries (info@coilcraft.com), and the website (http://www.coilcraft.com) where users can find the most recent data and information.

Note

Specifications are subject to change, and the document urges customers to check the Coilcraft website for the most up-to-date information. This datasheet was revised on 01/30/03 and is identified as Document 107-1.