APEM Toggle Switch Panel Mount On-On 4PDT Solder Terminal 30V DC 250V AC 5666A9

The APEM 5666A9 Toggle Switch is a panel mount, On-On, four pole double throw (4PDT) switch designed for a variety of industrial and electrical control applications. This switch is engineered to provide precise and reliable manual circuit switching where robust performance and versatility are critical. With a silver contact system, brass actuator, and a diallyl phthalate case, this model ensures chemical resistance and mechanical durability, making it suitable for demanding environments such as automation, control panels, machine tools, and equipment instrumentation.

This toggle switch is rated for use at up to 30V DC and 250V AC, supporting versatile voltage requirements across both low-voltage DC and mains-powered AC applications. Its 4PDT configuration enables users to simultaneously control four independent circuits with double-throw switching, which is especially valuable in complex control schemes or where redundancy and fail-safe operation are necessary. The reliable On-On operation allows selection between two separate circuits without a center-off position.

Offering a secure solder terminal connection, the 5666A9 is designed for panel cutouts of 6.5 mm diameter and features a standard bush thread for easy mounting. The actuator length is 11.4 mm, providing comfortable toggling action without excessive protrusion above the panel surface. The switch measures 21.2 mm in length, 13.2 mm in width, and 35.3 mm in height, optimizing it for compact panel layouts and multi-switch arrays.

Tested to support up to 100,000 mechanical operations, the model delivers long service life and reliability, making it ideal for repetitive use cases. It operates reliably in ambient temperatures ranging from -40°C to 85°C, making it suitable for both indoor and harsh outdoor settings. The unit conforms to major international standards such as UL, CECC, RoHS, and CSA, assuring compliance and broad acceptance in professional applications.

Typical use cases include industrial automation, control systems, electrical distribution panels, HVAC controls, and specialized test setups. Its robust materials and construction also make it a strong choice for manufacturing, instrumentation, and laboratory equipment where safety and consistent performance are paramount.

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