LCN 4040SE Sentronic Door Closer, 24V, Aluminum

The LCN 4040SE Series Sentronic Door Closer is a high-performance electromechanical device engineered for commercial and residential interior applications. Designed for durability and ease of use, this unit features a premium aluminum finish and a non-handed design, allowing for flexible installation on either side of the door frame. The standard package includes a standard arm, SE track, standard cover, and a comprehensive pack of wood and machine screws, ensuring that all necessary components are available for immediate installation.

This advanced closer utilizes 24-volt power to provide precise control over door movement. It is specifically sized for interior doors up to 4 feet in width, offering a reliable solution for managing traffic flow in tight spaces. A key advantage of the 4040SE model is its adjustable hold-open force, which allows facility managers to customize the door’s behavior to meet specific accessibility or security requirements. The device includes a momentary on/off switch board assembly that facilitates easy testing of the door release function while simultaneously providing essential over-voltage protection for the internal electronics.

Engineered for long-term serviceability, the LCN 4040SE is field replaceable, reducing downtime and maintenance costs. When the hold-open feature is not engaged, the unit functions as a full rack and pinion closer, ensuring consistent closing speeds and latch actions. This dual-functionality makes it an ideal choice for environments where both automated hold-open capabilities and traditional mechanical closing performance are required. The non-sized cylinder design further simplifies the fitting process for standard interior door configurations.