Knowles Precision Devices are a manufacturer of Multilayer, High Reliability, Single Layer and Precision Variable Capacitors, EMI Filters and Thin Film Devices. Knowles Precision Devices was formed by combining Dielectric Laboratories, Johanson Manufacturing, Novacap, Syfer and Voltronics, each well-established specialty capacitor makers with a combined history of over 175 years, into a single organization. Knowles products serve markets which include medical implantable and medical equipment, military, aerospace/avionics, EMI and connector filtering, oil exploration, instrumentation, industrial electronics, optical networks, telecom and automotive.

Novacap is a leading supplier of specialty multilayer ceramic capacitors. They offer a wide range of high-voltage, high-reliability, high-temperature and high-energy components for specialized applications, such as military and medical applications.

Syfer is a global leader for application-specific multilayer ceramic capacitors and EMI suppression filters.

The comprehensive product range includes many application-specific capacitors, including FlexiCap™, and the new StackiCap™ range, as well as standard voltages and capacitance values. Knowles also design and manufacture a range of EMI/RFI filters including surface mount types for pcb applications, as well as threaded and solder-in panel-mounted styles.