APC Smart-UPS SRT 5400VA 4800W 3U Rackmount Online UPS 208V SRT5KRMXLT

Key Features

• Double-conversion online design rated 5400 VA and 4800 W, feeding the load from the inverter continuously so there is no transfer break.
• Rated capacity is 5400 VA on APC's data sheet, not the 5000 the model name implies, so size against the sheet.
• Sine wave output at 208 V nominal (240 V also listed), which is what active power-factor-corrected server supplies need to see.
• 4 receptacles on the output: 2 x NEMA L6-20R and 2 x NEMA L6-30R.
• Input on NEMA L6-30P.
• 3U rack-mount chassis weighing 123 lb (55.79 kg).
• Sealed lead-acid battery, recharging in about 1.5 hours from flat.
• Surge energy rating of 480 joules on the input stage.
• Quoted at 55 dBA, so it belongs behind a door rather than on a desk.
• Rated for 32-104 F (0-40 C) operating temperature.
• Backed by 3 years repair or replace on the unit, excluding the battery, plus 2 years on the battery.

Key Specifications

• Rated capacity: 5400 VA / 4800 W (power factor 0.89)
• Topology: Double-conversion online
• Output voltage: 208 V nominal (240 V also listed)
• Output connections: 2 x NEMA L6-20R; 2 x NEMA L6-30R
• Input voltage: 208 V (240 V also listed)
• Input connection: NEMA L6-30P
• Battery: Sealed lead-acid (192V)
• Form factor: 3U rack-mount
• Dimensions: 5.1 in (13 cm) H x 17.008 in (43.2 cm) W x 28.3 in (71.9 cm) D
• Net weight: 123 lb (55.79 kg)
• Surge protection: 480 joules
• Warranty: 3 years repair or replace on the unit, excluding the battery, plus 2 years on the battery

What this unit is

The APC Smart-UPS SRT SRT5KRMXLT is a double-conversion online uninterruptible power supply rated at 5400 VA and 4800 W. Output is sine wave at 208 V nominal (240 V also listed), which is what active power-factor-corrected server and network supplies expect to see. APC's model name carries the number 5000, but the rated figure on the data sheet is 5400 VA. Size the load against the rated figure, not the name. The power factor works out at 0.89, so the watt rating rather than the VA rating is the number that runs out first on a modern IT load.

Power and outlets

Input is 208 V (240 V also listed) through a NEMA L6-30P connection. The output panel carries 4 receptacles: 2 x NEMA L6-20R and 2 x NEMA L6-30R. Input frequency is 40 - 70 Hz with auto-sensing. Match the receptacles to the equipment before ordering rather than after. A UPS with the right wattage and the wrong sockets is a shopping trip for adapters, and adapters on a rack power path are exactly what an audit picks up. If the outlet mix is close but not exact, a rack PDU downstream of the UPS is usually the cleaner answer than a handful of pigtails, and we stock those too.

Battery and runtime

The battery is sealed lead-acid, internal to the unit. APC quotes a typical recharge time of 1.5 hours from a full discharge, which is the figure that matters when outages arrive in pairs rather than singly. Sealed lead-acid batteries are consumables, not permanent parts. Expect to replace them somewhere in the three-to-five-year range depending on how warm the room runs, and treat that as planned maintenance rather than a fault. Heat is what kills them. Every few degrees above a normal room temperature meaningfully shortens service life, so the same unit in a ventilated rack will outlast the one tucked into a warm cupboard by a wide margin.

Form factor and size

This is the 3U rack-mount build. Dimensions are 5.1 in (13 cm) H x 17.008 in (43.2 cm) W x 28.3 in (71.9 cm) D. Net weight is 123 lb (55.79 kg). It is heavy enough that two people and a rack lift are the sensible way to install it, and heavy enough that the rack's own load rating is worth checking first. Check the depth against the rack before ordering. A UPS that fits the rails but not the cabinet is the most common surprise on an install, and rear cable service space has to come out of the same measurement.

Management and monitoring

A web and SNMP management card is standard on this model, and the SmartSlot figure of one free slot is what remains after that factory card is accounted for. The data sheet records 1 free SmartSlot, which is where an accessory card goes if you add one later. The sheet records the interface ports as RJ-45 10/100 Base-T, RJ-45 Serial, Smart-Slot, USB. A network management card matters more than it sounds. Without one the unit reports only to whatever is plugged into its USB or serial port, which means one machine sees the alarms and everything else finds out when it loses power.

Environment and noise

Operating temperature is 32-104 F (0-40 C). Acoustic noise is quoted at 55 dBA at one metre. Surge energy rating is 480 joules. Acoustics decide where a unit like this can live. Anything at or below the mid forties is quiet enough for an occupied office or a consulting room; above about fifty it belongs behind a door, because the fans do not stop when the load is light. The surge rating covers the everyday transients that arrive down the mains, not a direct strike. Take it as a measure of how much abuse the input stage will absorb before it stops protecting the load.

In the box

APC lists the following in the carton for this part number: Documentation CD, Rack mounting brackets, Rack mounting hardware, Rack mounting support rails, USB cable, User Manual, Warranty card and Web/SNMP Management Card. Warranty is 3 years repair or replace on the unit, excluding the battery, plus 2 years on the battery. Carton contents on APC part numbers move between data sheet revisions more than you would expect, and rail kits in particular come and go. The list above is what the current sheet for this exact part number prints, and we would rather quote that than a tidier list assembled from a sibling model.

If you are protecting a rack, a closet or a plant-room load and need 5400 VA of double-conversion online backup with the outlet set described above, the APC Smart-UPS SRT SRT5KRMXLT is a sound choice, and we hold it in stock. Contact us to learn more or secure this solution for your business today.