ASSA ABLOY DC300 DA Door Closer EN 3-6 Delayed Closing Brown EN 1154 1400mm 120kg

Product Overview

The Assa-Abloy DC300 DA door closer body is designed for use across all door types, including fire-rated and smoke-control doors, with performance verified to EN 1154 standards. Suitable for commercial and institutional environments, it supports door wings up to 1400 mm wide and 120 kg, and allows mounting on both hinge and non-hinge sides for left or right-opening doors. Built-in thermodynamic valves eliminate the need for seasonal adjustment, ensuring reliable function in varying temperatures.

The distinguishing feature of this DC300 DA model is its delayed closing function, which helps meet accessibility requirements and avoids abrupt door shut in high-traffic locations. This function is valued by facility managers and project planners dealing with public buildings where safe passage and accessibility are a priority. Particularly suited for fire and smoke doors in educational, healthcare, and office facilities requiring EN 1154 compliance and delayed closing action.

Key Features

• Adjustable closing force EN 3-6 ? covers door widths up to 1400 mm and wings 120 kg


• Certified to EN 1154 ? approved for fire and smoke barrier doors


• Thermodynamic valve ? stable operation, no seasonal adjustment needed


• Delayed closing function ? improves accessibility and safety in public areas


• Back-check function adjustable ? protects doors from wind and abrupt opening from 75°


• Mounts on hinge or non-hinge side, door or frame ? supports flexible installation


• Height adjustment 0-14 mm for arm axis ? allows compensation for varying door/frame tolerances

Technical Specifications

• Certification: EN 1154


• Closing Force: EN 3-6 (adjustable)


• Maximum Door Width: 1400 mm


• Maximum Door Weight: 120 kg


• Height Adjustment, Arm Axis: 0-14 mm


• Delayed Action: Yes


• Back-Check Adjustment: Yes, from 75°


• Mounting: Hinge side door leaf or opposite side on frame


• Door Types: Left- and right-handed


• Maximum Opening Angle: 180° (EN 5: 125°)


• Color: Brown

Applications

Suitable for fire-rated, smoke-control, and general doors in commercial, institutional, and public buildings such as schools, hospitals, and offices. Supports barrier-free access requirements by means of delayed closing, and can be used for both left- and right-handed doors with mounting flexibility. Ideal for OEM projects or facility renovations demanding EN 1154 certification and advanced closing control.

Packaging & Shipping

Standard export packaging. Unit includes door closer body, installation accessories, and instructions. Arm and additional hardware are sold separately.