APC Smart-ups Ultra on Line Srtl 5KVA RM Isolation/step-down Transformer - SRTL5KRMTF

APC by Schneider Electric SRTL5KRMTF 5KVA Rack-Mount Online UPS with Isolation Step-Down Transformer

Overview

The SRTL5KRMTF is a 5000VA online double-conversion UPS with a built-in isolation and step-down transformer — purpose-built for environments where three-phase 208V facility power must feed single-phase 120V rack equipment. Rather than sourcing a separate PDU transformer and a separate UPS, this unit handles voltage conversion, galvanic isolation, and battery backup in a single 2U rack footprint. That integration matters in data closets and security head-end racks where space is constrained and every power-path component is a failure point. If you're running NVRs, access control servers, or other 120V equipment in a building wired for 208V distribution, the APC by Schneider Electric SRTL5KRMTF eliminates the mismatch without a wall of adapters.

Key Features

• 5000VA / Online Double-Conversion: Online UPS topology means utility power never directly reaches your connected equipment — the inverter is always driving the load. There's no transfer time on outage, and transient voltage events are fully absorbed before they hit your hardware. For NVRs mid-write or access control servers managing door schedules, that zero-transfer-time guarantee prevents data corruption and system hangs that a line-interactive unit cannot.
• 208V Input, 120V Output — Integrated Step-Down: The built-in isolation transformer converts incoming rack power supplies from 208V (NEMA L6-30P, 30A circuit) to clean 120V output. This saves the cost and rack space of a standalone auto-transformer, and the galvanic isolation breaks ground loops that introduce noise into sensitive analog or IP video equipment.
• 12x NEMA 5-20R Output Outlets: Twelve 20A-rated receptacles on a single UPS gives you enough ports to power a fully-loaded NVR stack, network switches, and ancillary gear without outlet-strip daisy-chains. Each outlet is a standard NEMA 5-20R — compatible with virtually all North American rack equipment power cords out of the box.
• 24A Max Line Current, 30A Input Circuit: Drawing up to 24A on a 30A L6-30P feed keeps you within the NEC 80% continuous load rule without any de-rating math. Wire a single 30A 208V circuit and you're done — no panel capacity surprises at commissioning.
• 2U Rack-Mount, Horizontal Front-Mount: At 2U, the SRTL5KRMTF slots into standard 19-inch racks with minimal overhead. Front-mount orientation means cable management routes cleanly to the front of the rack where your patch panels and switch ports live — no reaching around to the rear for day-to-day connections.
• 95 lb Unit Weight: At 95 lb (43.09 kg), plan for two-person installation and verify your rack's weight rating before sliding it in. Most 2-post open-frame racks are rated 200–400 lb total; a four-post enclosed cabinet handles this more comfortably. Use a rack-mount slide kit if your rack supports it — bottom-mounting without rails on a heavy unit is a safety issue.
• 0–95% Non-Condensing Humidity, Up to 10,000 ft Operating Altitude: Rated for operation up to 10,000 ft altitude and across a wide humidity range, so it installs cleanly in high-altitude facilities and non-climate-controlled IDF closets where condensation risk is managed. Storage altitude extends to 50,000 ft — ships freight without derating concerns.

Integration and Compatibility

The SRTL5KRMTF fits naturally into NVR-based video surveillance head-ends and security operations closets fed from 208V commercial electrical distribution. The L6-30P input plug connects directly to standard 208V twist-lock receptacles common in data centers and commercial electrical panels. Output is twelve NEMA 5-20R receptacles, compatible with standard IEC C19/C20 adapters and North American equipment power cords. For larger deployments requiring PoE switch infrastructure alongside NVRs, confirm total connected load stays under 5000VA — budget roughly 150–300VA per managed PoE switch depending on connected camera count. Pair with a compatible APC Network Management Card (sold separately) for SNMP-based monitoring and graceful shutdown integration with your VMS or BMS platform.

Frequently Asked Questions

Q: What input voltage and plug type does the SRTL5KRMTF require?

A: The SRTL5KRMTF requires a 208V input circuit and uses a NEMA L6-30P plug. You need a dedicated 30A, 208V twist-lock receptacle — this is a standard commercial electrical circuit, not a standard 15A or 20A wall outlet.

Q: What output voltage and outlets does the SRTL5KRMTF provide?

A: Output is 120V AC across 12 NEMA 5-20R receptacles. This is the step-down function — the unit converts 208V input to standard 120V output, making it compatible with typical North American rack equipment without additional adapters.

Q: How much rack space does the SRTL5KRMTF occupy?

A: It occupies 2U (3.50 inches height) in a standard 19-inch rack and mounts horizontally. Note the unit weighs 95 lb — verify your rack's weight capacity and plan for two-person installation.

Q: Is this a true online (double-conversion) UPS or a line-interactive unit?

A: The SRTL5KRMTF is an online double-conversion UPS, which means connected equipment runs continuously from the inverter with zero transfer time on power outage. This is the correct topology for servers, NVRs, and access control equipment where even a brief transfer gap can cause issues.

Q: What is the maximum load the SRTL5KRMTF can support?

A: The unit is rated at 5000VA capacity with a maximum line current draw of 24A on the 208V input. Size your connected load to stay below 5000VA to maintain runtime and avoid overload conditions.

Q: What are the environmental operating limits for the SRTL5KRMTF?

A: Operating humidity is 0–95% non-condensing. Operating altitude limit is 10,000 ft. Storage temperature range is 5°F to 113°F (-15°C to 45°C). It is not rated for condensing environments.

James Everett

The spec that drives the deployment decision on the SRTL5KRMTF is the integrated 208V-to-120V isolation transformer. In commercial and enterprise buildings where electrical distribution runs at 208V three-phase, integrators routinely hit the mismatch problem: NVRs, switches, and access control servers are all 120V equipment. The SRTL5KRMTF solves that with one SKU rather than a transformer PDU plus a separate UPS — and the galvanic isolation is a bonus that eliminates ground-loop noise I've seen degrade analog video in mixed-topology head-ends.

Technical Highlights:

• 5000VA Online Double-Conversion: Zero transfer time on outage — the inverter is always live. For NVRs mid-write during a power event, this is the difference between a clean recording and a corrupted index.
• 12x NEMA 5-20R at 120V: Twelve 20A outlets from a single 208V/30A feed. That covers a densely populated security head-end without outlet-strip stacking or de-rating concerns.
• 2U Rack Footprint, 95 lb: Tight rack real estate is preserved, but weight planning is non-negotiable — this unit needs verified rack capacity and a two-person lift before it goes in the rails.

Deployment Considerations:

• Confirm the facility has a dedicated 30A, 208V NEMA L6-30P circuit at the rack location before specifying this unit — a 20A or 15A 208V circuit will not support the full 24A draw under load.
• At 95 lb, this is at or near the weight limit for many 2-post open-frame racks. A four-post enclosed cabinet with slide rails is the safer installation approach; bottom-shelf mounting without rail support at this weight is a liability.

The SRTL5KRMTF is the right call for enterprise security head-ends and data closets in 208V-distribution buildings where the integrator needs to consolidate voltage conversion and battery backup into a single rack unit — particularly in healthcare, education, and commercial real estate deployments where electrical infrastructure is standardized at 208V and equipment standardized at 120V.