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Custom Wound Coils and Solenoids

US Cotronics manufactures a complete range of custom coil windings, solenoids, and transformers. Our company maintains the highest quality standards and takes great pride in delivering on time. We have consistently shipped over 750,000 products per year while achieving sub 10 ppm quality and surpassing 99% on-time delivery.

A wide range of custom bobbin wound coils in both standard and nonstandard sizes.

Bobbin Wound Coils

A wide range of custom bobbin wound coils in both standard and nonstandard sizes.
Quality self-supported coil solutions designed for irregular components or bobbinless applications in which space is a limiting factor.

Self-Supported Coils

Quality self-supported coil solutions designed for irregular components or bobbinless applications in which space is a limiting factor.
A complete range of custom choke coils and inductors that are engineered to reliably meet the exact resistance specifications of each unique product.

Choke Coils

A complete range of custom choke coils and inductors that are engineered to reliably meet the exact resistance specifications of each unique product.
Reliable encapsulated coils and custom overmolding solutions that enhance durability and protect the vital electronic components from water and contamination.

Encapsulated Coils

Reliable encapsulated coils and custom overmolding solutions that enhance durability and protect the vital electronic components from water and contamination.
A wide range of custom solenoid coil components and electro-magnetic coil assemblies engineered to achieve a relatively uniform magnetic flux with minimal leakage.

Solenoid Coils

A wide range of custom solenoid coil components and electro-magnetic coil assemblies engineered to achieve a relatively uniform magnetic flux with minimal leakage.
Quality tape wrapped coil products manufactured in-house using high-performance tapes and specialized adhesives for improved strength, durability, and insulation.

Tape Wrapped Coils

Quality tape wrapped coil products manufactured in-house using high-performance tapes and specialized adhesives for improved strength, durability, and insulation.
Custom transformer coils including step-up, step-down, and isolation transformers, engineered for reliable performance in commercial power delivery and other high-performance industrial power applications.

Transformer Coils

Custom transformer coils including step-up, step-down, and isolation transformers, engineered for reliable performance in commercial power delivery and other high-performance industrial power applications.
Electromagnetic voice coil windings for voice coil actuators (VCAs) found in a wide variety of today’s electronics products, common in many direct-drive linear motor applications.

Voice Coils

Electromagnetic voice coil windings for voice coil actuators (VCAs) found in a wide variety of today’s electronics products, common in many direct-drive linear motor applications.

Complete Custom Coil Manufacturing Services

US Cotronics is an ISO 9001:2015 certified winding house offering full in-house manufacturing solutions for custom wound coils and solenoids. Located in Fairbury, Illinois, our company has delivered superior American manufacturing solutions, responsive customer service, and value-added engineering support since 1985.