APC by Schneider Electric AR8123BLK 1U Sliding Rack Shelf 100 lb Black
Overview
The AR8123BLK is a 1U sliding rack shelf from APC by Schneider Electric rated to hold up to 100 lbs (45.5 kg) — a practical solution for mounting non-rackable equipment inside standard 19-inch open-frame or enclosed rack enclosures. At 44 mm tall and 445 mm wide, it occupies a single rack unit while accepting equipment up to 72.1 cm deep, which covers most mid-size appliances, media converters, and control units that lack their own rack ears. If you've spent time trying to balance a heavy unrackable device on a static shelf while managing cable strain behind it, the sliding mechanism here is the spec to focus on.
The shelf ships in a heavy-duty package (838 mm × 813 mm × 89 mm) with a package weight of 17.7 kg, so account for that in freight planning when ordering in quantity for a large rollout. It fits cleanly into any APC rack and enclosure deployment where you need flexible staging for non-standard equipment.
Key Features
- 100 lb / 45.5 kg Load Rating: Most static shelves in this class top out at 50–75 lbs. The 100 lb ceiling means you can stage a pair of dense 1U appliances or a single heavy chassis without worrying about sag or rail stress — relevant in dense security head-end racks where recorders and processing units pile up fast.
- 1U Rack Height (44 mm): Taking only a single rack unit means you aren't burning vertical real estate unnecessarily. In a 12U or 18U wall-mount enclosure where every U counts, that matters. Pair this with a rack accessories plan that accounts for cable management above and below.
- Sliding Mechanism: The shelf extends out from the rack, giving you hands-free access to the equipment sitting on it — useful when you need to re-cable, reboot, or swap a device without fully extracting it from the enclosure. Static shelves require you to either pull the device completely or work blind at the back of the rack.
- 72.1 cm Maximum Depth: That's a generous 28+ inches of usable depth, which accommodates most mid-tower appliances, NVR chassis, or UPS units that won't rack-mount on their own. The minimum mounting depth is 2.8 cm and maximum mounting depth is 4 cm, so confirm your rail set falls within that bracket before ordering — rails outside that range won't engage the shelf properly.
- Metal Construction, No Plastic Flex: The all-metal housing eliminates the deflection you get with cheaper polymer shelves under sustained load. In a 24/7 surveillance equipment room or wiring closet, a shelf that slowly bows under a 40 lb NVR creates real risk of equipment shifts and cable pull.
- 445 mm Width: Standard 19-inch rack compatible. The 445 mm dimension fits flush inside the standard rail spacing used across APC NetShelter, two-post open-frame, and most third-party enclosures. No adapter brackets needed for standard builds.
- No Active Components: No fan, no power switch, no moving electronics — nothing to fail, nothing to maintain, nothing that generates heat or draws power. In an already-dense rack, adding a shelf that contributes zero thermal or electrical load is a real advantage over powered shelf alternatives.
- Black Finish: Color-matched to APC's standard black rack product line, keeping the install visually consistent in environments where the rack presentation is visible to clients or inspectors.
Integration & Compatibility
The AR8123BLK is designed for standard 19-inch rack systems. The 445 mm width and 2.8–4 cm mounting depth range are the two dimensions that determine fit — verify both against your specific enclosure's rail depth and hole spacing before specifying. It works with open-frame two-post racks, four-post enclosed cabinets, and wall-mount enclosures that meet the standard 19-inch EIA-310 rail spacing. It is not a vented shelf and has no cable pass-through cutouts, so plan your cable routing before loading equipment onto it. For environments running network video recorders or other non-rack-native appliances in a mixed equipment bay, this shelf gives you a clean, rated mounting point without custom fabrication.
Frequently Asked Questions
Q: What is the maximum weight the AR8123BLK can support?
A: The AR8123BLK is rated for 100 lbs (45.5 kg). Do not exceed this figure — sustained overloading on a sliding shelf stresses the rail engagement points and can cause equipment to shift or drop.
Q: What rack sizes does the AR8123BLK fit?
A: The shelf is 445 mm wide, designed for standard 19-inch rack systems. It requires a mounting depth between 2.8 cm (minimum) and 4 cm (maximum) — confirm your rack's rail depth falls in that range.
Q: How much vertical space does the AR8123BLK use?
A: It occupies 1U (44 mm) of rack height. That's a single rack unit, so it has minimal impact on available vertical space in any standard rack enclosure.
Q: Does the AR8123BLK include a lock or security mechanism?
A: No — the AR8123BLK does not include a locking mechanism. If equipment security is a requirement, a locking rack enclosure must be specified separately.
Q: Does the AR8123BLK have a built-in fan or ventilation?
A: No. The shelf has no built-in fan and no active components. It is a passive metal shelf. Thermal management for equipment placed on it is handled by your rack's enclosure ventilation, not the shelf itself.
Q: What is the maximum equipment depth the AR8123BLK can accommodate?
A: The shelf has a maximum depth of 72.1 cm (approximately 28.4 inches), which covers most mid-size appliances and chassis that won't rack-mount directly.
The AR8123BLK gets specified on almost every security head-end build I work on — not because it's exciting hardware, but because a 100 lb rated sliding shelf in 1U solves a real problem that comes up constantly: you have an NVR, a video decoder, or a control unit that doesn't rack-mount natively, and you need it in the rack at a fixed address with proper cable management. That 72.1 cm max depth is what seals it for most scenarios.
Technical Highlights:
- 100 lb Load Capacity: At 45.5 kg rated, you can place two dense 1U-equivalent appliances side by side without flex or rail stress — most comparable shelves in this class cap at 50–75 lbs, so this headroom matters when you're loading full-weight surveillance recorders.
- 72.1 cm Max Depth: Accommodates equipment up to roughly 28 inches deep, which covers virtually every mid-size NVR or appliance chassis on the market that lacks rack ears. Few 1U shelves in this price range go this deep.
- Passive Metal Construction: Zero active components means zero additional failure points, zero power draw, and zero thermal contribution — in a dense rack where heat budget is already tight, that's the right architecture for a shelf.
Deployment Considerations:
- Mounting depth compatibility is the first thing to verify: the AR8123BLK requires rails between 2.8 cm and 4 cm deep. Racks with non-standard or very shallow rails may not engage the shelf correctly — measure before you order, not after.
- There is no lock on this shelf. In publicly accessible locations or in racks without a locking enclosure, equipment placed on the shelf has no secondary retention — budget for a locking enclosure if physical security of the staged equipment is a requirement.
This shelf earns its place in security head-end closets and wiring rooms where you're mixing rack-native and non-rack-native equipment in a single enclosure and need a rated, reliable staging point that won't introduce heat, power draw, or maintenance burden into an already complex bay.
