Dimensions of a 19-inch chassis for subway use

A 19-inch rack is a standardized frame or enclosure for mounting multiple electronic equipment modules. Each module has a front panel that is 19 inches (482.6 mm) wide. The 19 inch dimension includes the edges or ears that protrude from each side of the equipm...

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Dimensions of a 19-inch chassis for subway use

A standard 19-inch chassis has a width of 19 inches (482.6 mm), with height measured in rack units (1U = 1.75 inches / 44.45 mm), and depth varying by design, typically 460–600 mm.Width and MountingThe overall width of a 19-inch chassis is standardized at 19 inches (482.6 mm) to fit industry-standard racks, but the internal mounting width between rails is slightly smaller, around 17.75 inches (450 mm), to accommodate the mounting brackets and hardware . Mounting holes follow EIA standards, with options for threaded or universal square holes for cage nuts .HeightChassis height is expressed in rack units (U), where 1U = 1.75 inches (44.45 mm). Common heights for subracks include 3U, 4U, 6U, or custom configurations depending on the equipment . For example, a 4U chassis would be 7 inches (177.8 mm) tall.DepthDepth varies depending on the application and load requirements. Typical depths for industrial or subway-use chassis range from 460 mm to 600 mm, allowing for horizontal mounting of circuit boards, transformers, or other heavy components . Some designs include adjustable rear panels or sliding rails for flexibility .Material and ConstructionSubway-use 19-inch chassis are often made from zinc-plated steel or aluminum, with front panels of 4 mm thick aluminum for durability and modularity . They can withstand high loads and allow for customization such as cutouts, engraving, or EMC shielding . Ventilated or solid covers are available depending on cooling requirements .Standards ComplianceFor subway and industrial applications, chassis typically comply with IEC 60297 and IEEE 1101.x standards, ensuring compatibility with Eurocards, backplanes, and modular assemblies . EMC-optimized designs are available to reduce interference in sensitive environments.SummaryWidth: 19 inches (482.6 mm), internal mounting 17.75 inches (450 mm)Height: 1U = 1.75 inches (44.45 mm), common 3U–6UDepth: 460–600 mm (varies by design)Material: Zinc-plated steel or aluminum, 4 mm front panelStandards: IEC 60297, IEEE 1101.x, EIA mounting hole patternsFeatures: High load capacity, modularity, EMC options, customizable front/rear panels This configuration ensures the chassis is suitable for subway control, signaling, or industrial electronics, providing both mechanical robustness and standard rack compatibility.
Dimensions 19inch Chassis Subway

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OverviewOverview and historyEquipment mountingCoolingSpecificationsRelated standardsGallery

A 19-inch rack is a standardized frame or enclosure for mounting multiple electronic equipment modules. Each module has a front panel that is 19 inches (482.6 mm) wide. The 19 inch dimension includes the edges or ears that protrude from each side of the equipment, allowing the module to be fastened to the rack frame with screws or bolts. Common uses include computer servers, telecommunications equipment and networking hardware

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