APC Smart-ups Step-down Transformer 5KVA Rackmount 2U 12X NEMA 5-20R Outlets - SRT5KRMTF

APC by Schneider Electric SRT5KRMTF Step-Down Transformer 5KVA 2U Rackmount

Overview

The SRT5KRMTF is a 5000VA rackmount step-down transformer designed to bridge the gap between 208V facility power and 120V equipment loads. If your data center, server room, or equipment rack runs on 208V three-phase or single-phase distribution but you need to power standard 120V devices — UPS units, PDUs, or compute hardware — this unit delivers that conversion in a compact 2U footprint with 12 NEMA 5-20R output receptacles. It pairs directly with APC's Smart-UPS SRT series and similar commercial-grade UPS platforms that output 208V, extending their usefulness to facilities requiring mixed-voltage loads without rewiring the distribution infrastructure.

Key Features

• 208V-to-120V Step-Down Conversion: Accepts a NEMA L6-30P input (30A, 208V) and converts to 120V across all 12 output receptacles. This means you can place standard North American 120V equipment — workstations, switches, IP cameras, access control panels — on a 208V UPS or distribution circuit without adapters or re-cabling. The step-down is passive and continuous, not a switched inverter, so there is no conversion lag or output interruption during normal operation.
• 12x NEMA 5-20R Outlets: All 12 output receptacles are NEMA 5-20R, rated for 20A devices. A single L6-30P circuit at 24A max line current feeds all 12 outlets — plan your connected load accordingly. With 5000VA capacity, that's roughly 416VA average per outlet if fully distributed, but in practice security or IT loads are rarely uniform, so headroom exists for burst draws from cameras with IR illuminators, pan-tilt-zoom motors, or network switches under traffic.
• 5000VA Load Capacity: Sized for a full rack of edge devices. A typical IP security deployment running 16–20 cameras, a PoE switch, an NVR, and an access control panel rarely exceeds 2,000–2,500W aggregate — this unit carries that load with margin. For network video recorders that draw 150–300W with populated drive bays, the 5KVA headroom prevents nuisance tripping under simultaneous spinup events.
• 2U Rackmount Form Factor: Horizontal rack mounting in 2U keeps the transformer co-located with the equipment it serves, simplifying cable runs and reducing voltage drop on the 120V side. The 3.5-inch profile fits standard 19-inch EIA racks and two-post open frames. Front-mounted design means access to the input and output connections without pulling the unit from the rack.
• 95 lb Unit Weight: At 43.09 kg, this is a dense unit — plan your rack loading accordingly. Bottom-of-rack or dedicated reinforced rails are the right approach. Do not mount above lightweight 1U devices without confirming rail and rack post ratings. Two-person installation is practical given the weight.
• Operating Environment — 0 to 10,000 ft Altitude: Rated for operation up to 10,000 feet above sea level with 0–95% non-condensing relative humidity. For most North American enterprise and government deployments — including high-altitude facilities in Colorado, Utah, or mountain-region campuses — this altitude envelope covers the site without derating. Above 10,000 ft, consult the manufacturer for derating guidance.
• Storage Temperature Range: -15°C to 45°C (5°F to 113°F) storage rating. Units can be warehoused in unheated facilities or shipped in summer without risk of thermal damage to the transformer core or windings, which matters for staged deployments where equipment sits in a loading dock or warehouse before installation.
• Single Input Cable: Ships with one input cable, connecting the NEMA L6-30P plug to your 208V source. No additional power distribution wiring is needed on the output side — the 12 receptacles are directly accessible from the front panel.

Integration and Compatibility

The SRT5KRMTF is purpose-built to complement APC Smart-UPS SRT series UPS units that output 208V, extending their protection to 120V-only equipment in the same rack. It is also compatible with any 208V single-phase source feeding a NEMA L6-30 circuit, including dedicated PDU tap-offs and branch circuit breakers in standard data center power distribution. For security integrators deploying PoE switches and edge compute in facilities built to ASHRAE A1/A2 power standards, the 208V input matches standard raised-floor power distribution without requiring a dedicated 120V circuit from the panel. Downstream load planning should account for the 24A maximum line current at the input — a fully loaded 5000VA draw at 208V approaches this limit, so maintain 20–25% overhead in practice.

Frequently Asked Questions

Q: What input plug does the SRT5KRMTF use?

A: The SRT5KRMTF uses a NEMA L6-30P input plug, rated for 30A at 208V single-phase. Verify your facility circuit provides a matching NEMA L6-30R receptacle before ordering.

Q: Can the SRT5KRMTF power standard 120V computers and IP cameras?

A: Yes. The unit steps 208V input down to 120V across all 12 NEMA 5-20R output receptacles, making standard North American 120V equipment — including IP cameras, PoE switches, NVRs, and workstations — fully compatible without adapters.

Q: What is the maximum load the SRT5KRMTF can handle?

A: The SRT5KRMTF is rated for 5000VA load capacity with a maximum input line current of 24A at 208V. In practice, maintain 20–25% headroom below rated capacity for reliable long-term operation.

Q: Is the SRT5KRMTF a UPS or only a transformer?

A: The SRT5KRMTF is a step-down transformer only — it provides voltage conversion from 208V to 120V but does not include a battery or inverter. It is designed to pair with an upstream UPS (such as an APC Smart-UPS SRT) that provides battery backup at 208V output.

Q: How much rack space does the SRT5KRMTF require?

A: The SRT5KRMTF occupies 2U (3.50 inches height) in a standard 19-inch rack. It mounts horizontally and is designed for front-facing installation.

Q: What are the operating altitude and humidity limits?

A: The SRT5KRMTF operates at altitudes up to 10,000 feet and within 0–95% non-condensing relative humidity, covering the majority of North American facility environments including high-altitude data centers.

Ted Perry

The SRT5KRMTF solves a real-world power distribution problem I see constantly in mixed-age facilities: the UPS infrastructure was spec'd for 208V distribution, but someone needs to add a rack of 120V security or edge compute equipment without pulling a new circuit. At 5000VA and 12 NEMA 5-20R outputs on a single L6-30P feed, this unit handles that conversion in 2U without touching the electrical panel.

Technical Highlights:

• 5000VA / 24A Input: Enough headroom for a full rack of IP cameras, PoE switches, and an NVR — typical physical security deployments draw 1,500–2,500W, leaving substantial margin against the 5KVA ceiling.
• NEMA L6-30P Input: This is the standard plug on APC Smart-UPS SRT 208V output connectors, so the pairing is direct — no adapters, no custom cable fabrication. One plug, one circuit, 12 outputs.
• 2U / 95 lb Footprint: Dense for a 2U device. At 43 kg, confirm your rack rails are rated — this is not a 1U switch. Slide rails and a two-person lift are the right approach; bottom-rack positioning is preferred to keep the center of gravity low.

Deployment Considerations:

• The 24A max line current is the binding constraint, not the 5000VA nameplate — at 208V, 5000VA is only 24A, so you are effectively at the input breaker limit at full load. Design for 80% of breaker rating: keep your connected load under 19–20A input draw for code-compliant continuous operation.
• This unit is a transformer, not a UPS — it provides no battery backup on its own. Upstream UPS protection at the 208V source is required for any load that requires ride-through during a power event.

This is the right unit for a corporate campus security deployment where the IDF closet was built for 208V distribution and the integrator needs to provision a new rack of 120V NVR, PoE switching, and access control hardware without a panel upgrade. It is not a fit for deployments requiring built-in bypass switching or network-managed outlet control — those needs require a full smart PDU upstream.