Middle Atlantic CUS RACKSHLF3SP Spat 14DP - RSH4S3M

Middle Atlantic RSH4S3M 3U Fixed Rack Shelf

Overview

The Middle Atlantic RSH4S3M is a 3U fixed steel rack shelf designed for integrators and IT teams who need a reliable, no-flex platform inside a standard 19-inch equipment rack. At 14 inches (356 mm) of usable depth and 3U of vertical height, the RSH4S3M gives you a stable mounting surface for unmanaged appliances, NVRs, power strips, patch trays, or any rack-mounted device that doesn't ship with its own rails. If you're building out a rack accessory kit for a surveillance or AV system, this shelf handles the hardware that doesn't fit the standard EIA rail pattern.

Key Features

• 3U Rack Height (133 mm): Three rack units of vertical space give you enough clearance for mid-profile appliances — think compact NVRs, UPS units, or media converters — without sacrificing an entire half-rack to a single device. The 133 mm opening keeps the footprint honest.
• 14-Inch Fixed Depth (356 mm): The 356 mm platform depth accommodates most 1RU and 2RU appliances without overhang. If you're racking a device with a 12-inch chassis, there's enough shelf left to manage cabling neatly behind it — no dangling power bricks.
• Steel Construction: The all-steel build handles the mechanical loads typical of enterprise rack environments — no plastic flex, no sag under a 20-lb NVR sitting off-center. Relevant when you're stacking gear and can't afford a shelf failure mid-deployment.
• Black Finish: The black powder coat matches standard rack hardware, which matters in glass-door server cabinets where visual consistency is part of the install standard. No mix-and-match silver against a black rack.
• Greenguard Certified: Greenguard certification means the shelf meets indoor air quality emission standards — relevant for school, healthcare, or government installations where low-VOC product requirements are part of the procurement spec. Not every rack accessory carries this.
• RoHS Compliant: RoHS compliance keeps this shelf in scope for EU-bound installations and government projects with hazardous-substance restrictions. Verify your full BOM compliance with a single check rather than sourcing exceptions.

Integration & Compatibility

The RSH4S3M mounts in any standard NVR or IT equipment rack with EIA-310 19-inch rails. This shelf is particularly useful when deploying rack-mount PoE switches or NVRs alongside appliances that lack dedicated rackmount ears — the fixed platform removes the need for custom mounting solutions. The 14-inch depth aligns with shallow two-post racks as well as standard four-post enclosed cabinets; verify your rack's interior depth before ordering if clearance is tight. For a broader look at the Middle Atlantic rack accessory line, compatible cable managers, blanks, and power distribution units are available in the same family. If you're planning a rack build for a multi-camera installation, reviewing a camera and rack planning guide first will help you size shelf count against your channel and hardware footprint.

Frequently Asked Questions

Q: What rack unit height is the RSH4S3M?

A: The RSH4S3M occupies 3U (133 mm) of vertical rack space.

Q: What is the usable shelf depth on the RSH4S3M?

A: The shelf platform is 356 mm (approximately 14 inches) deep.

Q: Is the RSH4S3M RoHS compliant?

A: Yes, the RSH4S3M carries RoHS compliance certification, making it suitable for EU-bound installations and projects with hazardous-substance restrictions.

Q: Does the RSH4S3M carry Greenguard certification?

A: Yes. The RSH4S3M is Greenguard certified, meeting indoor air quality emission standards relevant to healthcare, education, and government procurement specs.

Q: What material is the RSH4S3M shelf made from?

A: The shelf is constructed from steel with a black finish.

Q: Will the RSH4S3M fit a standard 19-inch equipment rack?

A: Yes. The RSH4S3M is designed for standard EIA-310 19-inch rack rails. Verify your rack's interior depth accommodates 356 mm of shelf depth before ordering.

Eden Phillips

When I spec the RSH4S3M into a rack build, the detail I keep coming back to is the 356 mm platform depth — that's the spec that determines whether this shelf actually solves your problem or just creates a new one. At 14 inches, it handles the majority of compact security appliances without overhang, but it's not a deep-rack shelf, so don't reach for it if you're racking full-depth 1U servers.

Technical Highlights:

• 3U height (133 mm): Enough vertical clearance for compact NVRs and power distribution units without burning a disproportionate chunk of your rack U-count on a single shelf.
• Steel construction: Handles real mechanical loads without flex — relevant when you're stacking heavy appliances and the shelf is the only thing between your gear and the rack floor.
• Greenguard + RoHS certifications: Dual compliance covers both indoor air quality mandates (schools, hospitals) and hazardous-substance restrictions (EU, government) — useful when procurement requires a certified BOM across every line item.

Deployment Considerations:

• Confirm your rack's interior usable depth before ordering — the 356 mm shelf won't work in racks with less than roughly 380–400 mm of interior clear depth once you account for rail thickness and cable management.
• The RSH4S3M is a fixed shelf, not a sliding one — plan your cable runs before final installation, since rear-access to equipment sitting on a fixed platform is limited once the rack is dressed.

Best fit: a compact physical security rack in a healthcare or education facility where Greenguard indoor air quality compliance is a procurement requirement and the hardware mix includes a small NVR, a PoE switch, and a handful of loose appliances that need a stable platform rather than dedicated rail mounts.