APC Smart-UPS Ultra 4900VA 4900W 2U Rackmount Lithium-Ion UPS 208V SRTL5KRM2UT

Key Features

• Double-conversion online design rated 4900 VA and 4900 W, feeding the load from the inverter continuously so there is no transfer break.
• Rated capacity is 4900 VA on APC's data sheet, not the 5000 the model name implies, so size against the sheet.
• Sine wave output at 208 V AC 1 phase (Other Output Voltages: 240 V), 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.
• 2U rack-mount chassis weighing 64.4 lb (29.2 kg).
• Lithium-ion battery, recharging in about 1.5 hours from flat.
• Network management card 3 is embedded in the unit, so there is no accessory card to buy and no slot to plan around.
• Surge energy rating of 1260 joules on the input stage.
• Quoted at 55 dBA, so it belongs behind a door rather than on a desk.
• Rated for 32 to 104 F (0 to 40 C) operating temperature.
• Backed by 60 months (5 years) repair or replace.

Key Specifications

• Rated capacity: 4900 VA / 4900 W (power factor 1.00)
• Topology: Double-conversion online
• Output voltage: 208 V AC 1 phase (Other Output Voltages: 240 V)
• Output connections: 2 x NEMA L6-20R; 2 x NEMA L6-30R
• Input voltage: 208 V AC 1 phase
• Input connection: NEMA L6-30P
• Battery: Lithium-ion (Lithium Ion)
• Form factor: 2U rack-mount
• Dimensions: H 3.4 in (86 mm) x W 17.008 in (432 mm) x D 27.6 in (701 mm)
• Net weight: 64.4 lb (29.2 kg)
• Surge protection: 1260 joules
• Warranty: 60 months (5 years) repair or replace

What this unit is

The APC Smart-UPS Ultra SRTL5KRM2UT is a double-conversion online uninterruptible power supply rated at 4900 VA and 4900 W. Output is sine wave at 208 V AC 1 phase (Other Output Voltages: 240 V), 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 4900 VA. Size the load against the rated figure, not the name. VA and watts are rated the same here at a power factor of 1.00, so there is no hidden derating between the two numbers.

Power and outlets

Input is 208 V AC 1 phase 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 lithium-ion, 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. Stated battery service life on this sheet is 5 to 10 years (printed as "Battery Life"). Lithium-ion changes the ownership maths on a UPS more than any other single specification. The cells last far longer than sealed lead-acid, they weigh a fraction as much for the same energy, and they tolerate warmer rooms, which together tend to remove one or two mid-life battery replacements from the budget over the life of the unit.

Form factor and size

This model is rack/tower convertible and takes 2U of rack height when it is mounted horizontally. Dimensions are H 3.4 in (86 mm) x W 17.008 in (432 mm) x D 27.6 in (701 mm). Net weight is 64.4 lb (29.2 kg). Those are rack-orientation figures. APC publishes no tower-orientation dimensions for this model, so if you intend to stand it up, measure against the rack figures rather than assume a published tower footprint. One person can handle it, but it is dense for its size, so mount it low in the rack rather than high.

Management and monitoring

Network management is embedded on this model rather than fitted as a SmartSlot card: the management card 3 is built into the unit, so there is no accessory card to buy and no card slot to plan around. Interface ports are Serial port, USB port and Embedded network management card 3. 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 to 104 F (0 to 40 C). Acoustic noise is quoted at 55 dBA at one metre. Surge energy rating is 1260 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: 1 CD (software and documentation), Network cable and Rack Mounting brackets. Warranty is 60 months (5 years) repair or replace. One caveat we would rather state than hide: APC's own contents list for this part number does not itemise the rail kit its marketing title advertises. We have not added it to the list above, and we will confirm against the carton before shipping. 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 4900 VA of double-conversion online backup with the outlet set described above, the APC Smart-UPS Ultra SRTL5KRM2UT is a sound choice, and we hold it in stock. Contact us to learn more or secure this solution for your business today.