About APITech

the market leader in EMI protection

APITech, formally Spectrum Control, has been providing EMI filtering solutions since 1968. We design and manufacture products to suppress or eliminate EMI and offer the industry’s most complete line of filtering products and components. These products help address the requirements of your design and are underpinned by the most experienced team of EMI-focused engineers in the industry.

APITech EMI protection products are made using our highly integrated manufacturing process. We manufacture the filter components and packaging including our own high quality ceramics attenuators.