Half turn trimmer capacitors claim to cure medical shortages

New and evolving markets, such as automotive, defence, mobile, industrial, and the IoT are creating surges in demand for passive components, yet Knowles cautions that this can be at the expense of other industries. It reporrts that some manufacturers are ceasing production of mature lines or slimming down ranges in favour of newer ones. The company, however, continues to support customers in the medical devices industry, with a range of non-magnetic trimmer products.

Voltronics has offered high performance, high Q, half turn trimmer capacitors for over 20 years. The portfolio includes the J series of half turn trimmer capacitors for demanding applications, including RFID, medical devices, cellular technologies and tunable filter circuits. The capacitors are available in standard and high voltage (HV) ranges, and offer up to 50pF and 350V DC working voltage.

While a trimmer capacitor may be more expensive than a fixed-value capacitor, it is often cost-comparable to the closest tolerance MLCC and is more flexible. The half-turn trimmer capacitors offer a solution for surface-mount variable capacitor requirements. The JZ series features the lowest magnetic content making them particularly suitable for MRI applications, says the company. There is also an HV version, providing working voltage up to 350V DC with DWV of 700V DC in addition to a recently extended maximum capacitance of 50pF.

The JR series offers 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 have a dust-proof and solvent-resistant design.