Chip Inductors combine low RDC and high-current operation.

Press Release Summary:

Measuring 3.2 x 1.8 x 1.8 mm, LB3218 series wire-wound chip inductors combine functionality of two 3225-size low-resistance (RDC) and high-current inductors into one 3218-size device. Series, comprised of 16 part numbers rated from 0.05-6.5 ohms and 1,000-60 mA, offer inductance ratings from 1.0-330 µH at operating frequencies of 796 kHz to 7.96 MHz. Non-polarized electrodes enable mounting irrespective of device orientation.

Original Press Release:

Taiyo Yuden's New Chip Inductors Combine Low RDC and High-Current Operation into a Single 30% Smaller-Footprint Device

LB3218 series inductors combine two devices into one; provide drop-in replacement using same land pattern as larger 3225-size Low RDC or high-current devices

SCHAUMBURG, IL-November 30, 2005-TAIYO YUDEN (U.S.A.), INC.'s new LB3218 wire-wound chip inductors simplify designs, reduce part counts and lower bill-of-material (BOM) costs by combining the functionality of two 3225-size low-resistance (RDC) and high-current inductors into a single 3218-size device. Measuring 3.2mm L x 1.8mm W x 1.8mm H, the LB3218 is ideal for use in power supply circuits of digital still cameras, camcorders, VCRs and other mature commodity-type equipment formats in which it is difficult or impractical to implement new circuit designs. Compared to larger 3225-size devices (3.2mm L x 2.5mm W x 2.2mm H), the LB3218 is 40% smaller by volume, 20% thinner and offers a 30% smaller device footprint. Designed as a drop-in replacement for previous-generation LEMF (low RDC) and LEMC (high current) series inductors from TAIYO YUDEN, the LB3218 facilitates manufacturability by using the same land pattern as before, thus eliminating any design modifications required for upgrading to LB3218 series parts.

Now available in mass production quantities, the series comes in 16 available part numbers from 0.05 to 6.5Ohms and 1000 to 60mA, respectively. The LB3218 offers a wide range of inductance ratings from 1.0-330µH at operating frequencies of 796KHz to 7.96MHz. Key specifications for LB3218 series wound chip inductors include:
Part Number   Number of Parts   Inductance (µH)         Resistance    Current Ratings
in Series ± Tolerance % RDC (Ohms) (mA)
LB3218TxRxM 6 1.0-6.8 ±20% @ 7.96 MHz 0.05-0.17 1000-400
LB3218Txx0K 6 10-68 ±10% @ 2.52 MHz 0.22-1.4 300-130
LB3218Txx1K 4 100-330 ±10% @ 796 KHz 2.2-6.5 100-60

Until the LB3218 series, customers had to choose between a low RDC inductor or a high-current model, the design of which proved too difficult to combine the characteristics of both into one device. In response to this design challenge, TAIYO YUDEN employed advanced material science and fabrication techniques to redesign the ferrite-resin composite used in previous-generation devices. The shape of the ferrite core, its thickness and the number of windings were specifically designed to eliminate all wasted space and to produce the highest possible rated current and lowest possible RDC in a 3218-size device. As with other TAIYO YUDEN inductors, the non-polarized electrodes of the LB3218 series allow mounting irrespective of device orientation, thus simplifying manufacturability.

For further information, call TAIYO YUDEN (U.S.A.), INC. or visit the company web site at

Sample Price: $0.20 each

Availability: Now, in volume production quantities

Delivery ARO: 2 weeks ARO


Now in its 55th year, Tokyo-based TAIYO YUDEN CO., LTD. is a worldwide manufacturer of surface-mount and leaded passive components, Bluetooth modules, power electronics modules, power supplies and recordable digital media. With approximately 50% of the worldwide market in high-frequency multilayer chip inductors used in cell phones, the company reports annual sales of nearly US$1.6B. Worldwide, TAIYO YUDEN employs more than ten thousand people. The company's North American affiliate, TAIYO YUDEN (U.S.A.), INC., operates sales and engineering offices in Chicago, IL, Raleigh, NC, Irving, TX, and in California at San Jose and San Diego. For further information, visit the company's website at:

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