Courtesy of Knowles Precision Devices : Half Turn Trimmer Capacitors from Voltronics, solving shortages in the medical industry
New and evolving markets, including automotive, defense, mobile, industrial, and internet of things (IoT) are creating surges in demand for passive components. As a result, some manufacturers are ceasing production of mature lines or slimming down ranges in favour of newer and more profitable products. Continuing to support customers in the medical devices industry, Knowles Precision Devices brand Voltronics offers a wide range of non-magnetic trimmer products. Of particular interest is the J series of half turn trimmer capacitors.
Voltronics has been offering high performance, high Q, half turn trimmer capacitors for over 2 decades. The J series is a proven performer that delivers uncompromising stability for even the most demanding applications, including RFID, medical devices, cellular technologies, tunable filter circuits and much more. Available in standard and high voltage (HV) ranges, they offer up to 50pF and 350V DC working voltage.
Design engineers are often faced with trade-offs, one of which may be the choice between a fixed or trimmer capacitor. While a trimmer capacitor may be considered slightly more expensive than a fixed value capacitor, it is often cost-comparable to the closest tolerance MLCC. But in addition, it will provide greater flexibility. Voltronics’ J series, half-turn trimmer capacitors offer a quality solution for surface mount variable capacitor requirements. The JZ series features the lowest magnetic content making them particularly suitable for MRI applications. They are also available in an HV version, providing working voltage up to 350 VDC with DWV of 700 VDC in addition to a recently extended maximum capacitance of 50 pF.
The JR series offer most of the range of capacitance available in the JZ series but in a more compact package size. Both ranges are pick-and-place compatible and feature a dust-proof and solvent-resistant design.
Dielectric Laboratories (DLI), Novacap, Syfer Technology and Voltronics came together to form a single organisation, Knowles Precision Devices – they have now been joined by Johanson Manufacturing and Compex. This entity has a combined history exceeding 200 years and is a division of Knowles Corporation of USA, an independent publicly traded company.