APC by Schneider Electric 6KVA/6KW Rackmount 4U 208V 2X L6-20R+3X L6-30R NEMA - SRT6KRMXLT-A

APC by Schneider Electric SRT6KRMXLT-A 6KVA 6KW 208V 4U Rackmount Online UPS

Overview

The SRT6KRMXLT-A is a 6KVA/6KW double-conversion online UPS in a 4U rackmount chassis, designed for 208V environments where continuous power quality matters — server rooms, data closets, surveillance recording infrastructure, and edge compute deployments. With 2x NEMA L6-20R and 3x NEMA L6-30R battery-backed outlets, it delivers protected power to a mixed load of high-draw devices without requiring a separate PDU for most standard rack builds. If you are sizing for a rack with NVRs, managed switches, and compute nodes all drawing 208V, the SRT6KRMXLT-A (often searched as SRT6KRMXLT A) covers that load in a single 4U footprint.

Key Features

• 6KVA / 6KW Capacity: True double-conversion online architecture means incoming utility power is continuously converted to DC and back to clean AC — your equipment never switches to battery during a sag or surge, it is always running on conditioned power. At 6KW true watts (unity power factor), there is no derating penalty: a 6KW load is a 6KW load.
• 208V Rackmount, 4U Form Factor: Designed for standard 19-inch racks at 208V — the voltage tier used in most commercial and enterprise data environments. At 4U, it fits a standard 42U rack without dominating the space budget, leaving room for PDUs, patch panels, and equipment.
• 2x L6-20R + 3x L6-30R Outlet Configuration: Five battery-backed outlets cover a realistic mix of server and networking hardware. The L6-30R receptacles handle higher-draw devices (servers, storage arrays) while the L6-20R pair suits networking gear and lighter loads — no adapter hunting required if your equipment already ships with L6-series cordsets.
• Data Protection via Continuous Conditioning: Double-conversion topology eliminates the transfer-time gap present in line-interactive designs. For NVRs writing continuously to disk, surveillance servers running analytics, or access control servers managing door credentials, zero-transfer-time means no dropped frames, no interrupted writes, and no corrupted databases during a utility event.
• Equipment Protection Against Surges and Brownouts: Sensitive electronics — cameras, switches, managed recorders — are shielded from voltage spikes and brownouts that sit below the trip threshold of basic surge strips but still degrade hardware over time. Online double-conversion absorbs these events before they reach connected equipment.
• Business Continuity for Critical Systems: Runtime on battery allows security systems, access control panels, and communication infrastructure to remain operational through short outages and provides a controlled shutdown window for longer ones — preventing the corrupted-state restarts that cause the most integration headaches.
• Remote Connectivity Preservation: Battery-backed outlets keep routers, firewalls, and managed switches online during outages, maintaining remote access to the systems that need monitoring most when power is unstable.

Integration and Compatibility

The SRT6KRMXLT-A is part of APC by Schneider Electric's Smart-UPS RT lineup, which supports rackmount UPS systems compatible with APC PowerChute software for automated graceful shutdown and monitoring integration. The L6-series outlet configuration is standard in commercial rack power distribution environments and pairs directly with most enterprise server and networking cordsets without adapters. For network video recorders and surveillance infrastructure drawing 208V, this unit provides the conditioned power baseline that prevents the storage-write errors and unexpected reboots that degrade recording reliability. Consult your UPS sizing guide to confirm runtime expectations against your actual load before specifying.

Frequently Asked Questions

Q: What is the difference between the SRT6KRMXLT-A and a standard line-interactive UPS?

A: The SRT6KRMXLT-A uses double-conversion online topology, meaning equipment always runs on inverter-generated power rather than switching to battery only during an outage. Line-interactive units have a transfer time (typically 2–6ms) when utility power fails. For continuously writing NVRs, database servers, or access control systems, zero transfer time prevents corrupted writes and state errors that a line-interactive unit cannot fully prevent.

Q: What outlets does the SRT6KRMXLT-A provide?

A: It has 2x NEMA L6-20R and 3x NEMA L6-30R battery-backed outlets, all at 208V. These are twist-lock receptacles standard in commercial rack environments — verify your equipment cordsets terminate in L6-series plugs or plan for appropriate adapters.

Q: How much rack space does the SRT6KRMXLT-A require?

A: It occupies 4U in a standard 19-inch rack, which is typical for a 6KW online UPS. Budget this space in your rack layout when specifying alongside PDUs and equipment.

Q: Is the SRT6KRMXLT-A suitable for a surveillance or security equipment rack?

A: Yes. Its double-conversion topology and 6KW capacity make it well-suited for racks combining NVRs, managed PoE switches, servers, and access control hardware at 208V — equipment categories where unplanned reboots cause the most operational disruption. Confirm total load wattage against the 6KW ceiling before finalizing the design.

Q: Does the SRT6KRMXLT-A support management software?

A: The Smart-UPS RT family is compatible with APC PowerChute software for automated shutdown and monitoring. Verify the specific network management card options for the SRT6KRMXLT-A with APC directly, as card configurations vary by SKU.

Jerry Tildsen

When I spec the SRT6KRMXLT-A for a customer, the first thing I confirm is voltage: this is a 208V unit with L6-series twist-lock outlets, not 120V with standard NEMA 5-15 receptacles. That distinction eliminates it from residential or small-office deployments immediately, but it is exactly right for commercial data closets and dedicated security equipment rooms where 208V is the standard feed. The 6KW true-watt capacity at unity power factor means the nameplate number is the real number — no derating for power factor correction that you see on older VA-rated UPS designs.

Technical Highlights:

• Double-Conversion Online Topology: Zero transfer time to battery — connected equipment runs on clean, regulated inverter output continuously, not just during outages. Critical for NVRs and access control servers where a 4ms gap can corrupt an active write or drop a door event.
• 6KW True Watts at 208V: Covers a realistic mixed rack: two or three NVRs, a managed PoE switch stack, and a server, without headroom anxiety. Size to 80% of capacity (roughly 4.8KW running load) for thermal and battery longevity best practice.
• 5x Battery-Backed L6 Outlets: The 2x L6-20R plus 3x L6-30R mix handles differentiated loads in one unit — higher-draw servers on the 30A receptacles, networking hardware on the 20A pair — without a separate PDU tier for most builds.

Deployment Considerations:

• Confirm the upstream circuit breaker is rated for 208V and sized for the UPS input draw at full load — a 6KW load at 208V pulls roughly 30A, so a dedicated 40A circuit is the standard design practice.
• The L6-series outlets require matching cordsets on connected equipment; most enterprise servers and managed switches ship with L6-30P or L6-20P plugs for 208V configurations, but verify before rack commissioning to avoid a last-minute cordset scramble.

The SRT6KRMXLT-A is the right call for a dedicated security operations rack — NVRs, PoE switch infrastructure, access control servers — in a commercial building with a 208V power feed, where double-conversion protection and a clean 5-outlet mix eliminate the two most common failure modes: transfer-time write corruption and outlet-count shortfalls.