Gowanda claims inductors are first off-the-shelf mil-RF options

Claimed to be the first off-the-shelf shielded RF surface mount (SMT) inductors with established reliability (ER) rating, the Gowanda ER5025S complements MIL-PRF-39010 qualified product list (QPL) axial-leaded (through-hole) products, says Gowanda. They enable the products’ conversion to SMT circuitry, adds the company.

The Gowanda ER5025S inductors were developed by the company in response to a market need for shielded surface mount options to the traditional through-hole designs. Surface mount components enable the use of more efficient assembly methods when compared to through-hole methods, maintains the company. Gowanda was the first comapny to offer an ER series in a surface mount configuration last year, the Gowanda ER3013.

The ER5025S series meets the military’s QPL requirements for ER to failure rate level M and addresses two MIL-PRF-39010 slash numbers (/17 and /18). This qualification requires extensive testing for electrical, environmental, mechanical and thermal performance. Level M represents the first level of failure rating for off-the-shelf inductors for high-reliability applications. In its ongoing commitment to the military market, Gowanda intends to achieve higher level failure ratings (Level P, then Level R) as ongoing testing continues to accumulate the hours necessary to attain those ratings on this shielded ER SMT series.

Gowanda’s wirewound, moulded, shielded ER5025S series is designed for RF applications in military, aerospace and space – including defence and NASA communities. They are designed for use in communication, guidance, security, radar, test and evaluation and special mission applications. The shielded series has three per cent maximum coupling and is used specifically in applications where the close proximity of circuit board components requires the inductor to be shielded to minimise interactions. 

The performance range provided by the ER5025S series includes inductance from 0.10 to 10,000 micro H, Q minimum from 40 to 60, SRF minimum from 1.0 to 450MHz, DCR maximum from 0.025 to 139-Ohms, and current rating from 30 to 2245mA DC. The MIL-PRF-39010 slash number determines specific performance, core type (phenolic, powdered iron or ferrite) and shielding type (iron sleeve or ferrite sleeve). Operating temperature range is -55 to +105 degree C.

The introduction of a shielded ER surface mount series is a result of Gowanda’s commitment to developing designs that address the evolving needs of the engineering community, said Don McElheny, CEO of Gowanda Components Group. He added that Gowanda will introduce more ER SMT series in the future.


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