APC by Schneider Electric the 3KVA Line Interactive 2U Rackmount UPS Provides Pure - SMT3000RMT2U

APC by Schneider Electric SMT3000RMT2U 3000VA 2U Rackmount Line Interactive UPS

Overview

The SMT3000RMT2U is a 3000VA / 2700W line interactive UPS in a 2U rackmount form factor, built for 208V single-phase environments. It delivers a pure sine wave output with a 4ms typical transfer time — fast enough to ride through the momentary sags and swells that cause servers, network switches, and IP security infrastructure to reboot unexpectedly. If your rack draws from a 208V circuit and you need a UPS that won't introduce a stepped-approximation waveform that upsets sensitive power supplies, this is the model to evaluate. Explore the full APC by Schneider Electric power protection line for the broader family context.

Key Features

• 3000VA / 2700W Pure Sine Wave Output: The 2700W real-power rating means you have meaningful headroom beyond the VA label — not all 3000VA UPS units deliver 90% power factor output. Pure sine wave matters when powering active PFC power supplies common in server platforms; a simulated sine wave can cause those supplies to run hot or trip protection circuits.
• 208V Input and Output (NEMA L6-20P / L6-20R): Wired natively for 208V distribution — the standard in most US data centers and server rooms fed from a 3-phase panel. The included 8 ft (2.44 m) L6-20P cord reaches typical PDU or wall receptacle distances without an extension. Output is two NEMA L6-20R receptacles, so plan your load distribution accordingly before spec'ing the downstream power strip or PDU.
• Line Interactive Topology: The built-in automatic voltage regulation (AVR) corrects input voltage browndowns and surges without switching to battery — extending battery life considerably in environments where utility power fluctuates but doesn't fail outright. Line interactive is the right tier for server room closets and branch office racks; it's a step up from standby topology in protection level without the cost of a double-conversion online UPS.
• 4ms Typical Transfer Time (8ms Maximum): Server-grade power supplies with active PFC typically tolerate transfer times well under 20ms. The 4ms typical / 8ms maximum spec keeps you inside that window even in worst-case conditions — meaning a clean cutover to battery without a server POST cycle.
• 2U Rack-Mount Profile: Two rack units is a reasonable trade-off for a 3000VA unit. Mount it toward the bottom of the rack to keep the center of gravity low — at 97.62 lb (44.28 kg) this is a two-person lift. Front-mounted LCD status console keeps battery and load status visible without pulling the unit.
• Multi-Function LCD Control Panel: The onboard LCD displays load percentage, battery charge state, input/output voltage, and estimated runtime — information you'd otherwise need SNMP or management software to surface. Useful during commissioning to verify load balance across the two output receptacles.
• Lead-Acid Battery with 3-Hour Recharge: Recharges to full in approximately 3 hours after a full discharge — relevant for environments where back-to-back outages are possible. The replacement battery is the RBC43, a field-swappable module. Battery life is rated at 3–5 years depending on operating environment and depth of discharge cycle history.
• Configurable Audible Alarms: On-battery alarm, low-battery alarm, and configurable alarm delays — so you can suppress nuisance alerts during planned maintenance windows without disabling protection monitoring entirely.
• Operating Environment: Rated for 0–10,000 ft altitude and 0–95% relative humidity (non-condensing). Heat dissipation is 348 Btu/h at full load — factor this into rack thermal planning, particularly in dense 2-post or enclosed 4-post configurations. Acoustic output is 55 dBA, audible in quiet server rooms but typical for this UPS class.

Integration and Compatibility

The SMT3000RMT2U fits standard 4-post EIA-310 racks and is front-mount oriented. The single free SmartSlot expansion bay accepts APC network management cards (sold separately) for SNMP monitoring, email alerting, and graceful server shutdown integration via PowerChute — worth provisioning if this UPS is protecting infrastructure that requires coordinated shutdown sequencing. For UPS monitoring in larger deployments, pair with a network management card to integrate into your NMS. The 208V / L6-20 circuit requirement means this unit is not a drop-in replacement for 120V / NEMA 5-20 environments — verify your panel feed voltage and receptacle type before ordering. For broader rackmount UPS options across capacity tiers, compare the SMT series against higher-VA models in the Smart-UPS line if your load calculations are within 20% of this unit's 2700W ceiling. For UPS selection guidance on sizing methodology, runtime planning, and topology trade-offs, consult the UPS buying guide before committing to a capacity tier.

Frequently Asked Questions

Q: What input voltage and plug type does the SMT3000RMT2U require?

A: The SMT3000RMT2U requires a 208V input circuit and ships with a NEMA L6-20P plug on an 8 ft cord. This is a 208V-only unit — it is not compatible with standard 120V NEMA 5-20 outlets found in office environments.

Q: Does the SMT3000RMT2U produce a pure sine wave output?

A: Yes. The SMT3000RMT2U outputs a true pure sine wave, both on utility power and on battery. This is important for servers and networking equipment with active PFC power supplies, which can behave erratically or trip protection circuits when fed a stepped or simulated sine wave.

Q: How fast does the SMT3000RMT2U switch to battery during an outage?

A: Transfer time is 4ms typical and 8ms maximum. Most server-grade power supplies with active PFC tolerate transfers well under 20ms, so this unit stays safely inside that window even at the worst-case specification.

Q: What is the replacement battery for the SMT3000RMT2U?

A: The replacement battery cartridge is the RBC43. Battery life is rated at 3–5 years depending on operating conditions. Recharge time after full discharge is approximately 3 hours.

Q: Does the SMT3000RMT2U support remote monitoring or network management?

A: The unit includes one free SmartSlot expansion bay. An APC network management card (sold separately) installs into this slot to enable SNMP monitoring, email alerting, and PowerChute-based graceful server shutdown. The onboard LCD provides local status without a management card.

Q: How much does the SMT3000RMT2U weigh and what rack space does it require?

A: The unit weighs 97.62 lb (44.28 kg) and occupies 2U of rack space. It is a two-person lift and should be mounted low in the rack to keep the center of gravity stable. It requires a standard 4-post EIA-310 rack and is front-mount oriented.

Jerry Tildsen

The SMT3000RMT2U is a unit I'd specify with confidence for a 208V server room rack where the load sits between 1,500W and 2,400W — you want to stay at 80% of the 2700W ceiling for thermal and battery runtime margins. The pure sine wave output at both the rated 2700W and during battery transfer is the detail that separates it from cheaper line interactive units that deliver a stepped waveform on battery and cause active PFC supplies to misbehave.

Technical Highlights:

• Pure Sine Wave on Battery: Critical for active PFC server PSUs — a stepped approximation waveform can cause PSU overcurrent protection to trip, which defeats the entire purpose of the UPS. The SMT3000RMT2U avoids this failure mode entirely.
• 4ms / 8ms Transfer Window: The 4ms typical spec is well inside the hold-up time of virtually every enterprise server PSU. Even at the 8ms worst case, you're protected. This matters more than runtime in most enterprise outage patterns, which are sub-second voltage events rather than extended power failures.
• SmartSlot Expansion: The single free SmartSlot is the unit's most underused feature in smaller deployments. A network management card turns this into a monitored, remotely-manageable device — useful in multi-site deployments where someone needs to see battery health and load percentage without dispatching a technician.

Deployment Considerations:

• At 97.62 lb, this requires two people and proper rail hardware for rack installation — plan for this during the installation window, not after the unit arrives on site. Mount it in the bottom third of the rack for stability.
• The two NEMA L6-20R output receptacles limit your direct-connected device count. Most deployments will run a 208V L6-20 PDU off one or both outputs — factor PDU load capacity into your total draw calculation against the 2700W ceiling.

This unit is the right fit for a branch office or edge data closet running a 208V circuit with a mixed load of servers, PoE switches, and IP security NVRs — where pure sine wave output and a proven AVR topology matter more than extended runtime autonomy.