CT04 Series Miniature Molded Reed Switch

The Coto Technology CT04 series is an extremely small overmolded dry reed switch and is available in large volumes for mass production. The encapsulated single-pole, single-throw (SPST) reed switch features normally-open ruthenium contacts and is designed as a double-ended type, making it versatile for activation by either an electromagnet, a permanent magnet, or both. The CT04 series is intended for SMD applications and is available in either gull-wing or J-bend lead configurations.

The CT04 series is a redesign of the popular CT05 series from Coto, maintaining the same PCB footprint but optimized for higher volume production. This version offers the smallest molded reed switch sensor with magnetic switching and insulation properties that outperform other technologies. With hermetically sealed ruthenium contacts, the CT04 is designed for long-lasting performance and is tested to withstand up to 1 billion operations. Ideal for a range of applications, including medical devices, proximity sensing, hearing aids, and other products requiring reliable magnetic sensing, the CT04 series delivers exceptional performance and insulation in a compact, durable form. Furthermore, all CT04 reed switches are 100% tested, including verification of the exact sensitivity range after the lead cut and bend process.