APC by Schneider Electric SMTL3000RM2UCNC vs Vertiv GXT5-3KL620RT2UXL: Specification Comparison
Both the APC SMTL3000RM2UCNC and the Vertiv GXT5-3KL620RT2UXL are 3 kVA rackmount UPS units aimed at IT infrastructure protection — servers, networking gear, and edge deployments. Despite sharing the same VA class, they differ fundamentally in topology, input/output voltage, and efficiency profile. This comparison evaluates them across the dimensions that matter most to installers and IT buyers: power architecture and efficiency, voltage compatibility and wiring, and management and interface options.
In This Guide
- Which UPS topology and efficiency profile better protects critical loads?
- Are the input and output voltage configurations compatible with your facility wiring?
- What remote monitoring, communication, and management options does each unit provide?
- Which should you choose: the SMTL3000RM2UCNC or the GXT5-3KL620RT2UXL?
- Side-by-Side Specs
- FAQ
Which UPS topology and efficiency profile better protects critical loads?
The SMTL3000RM2UCNC uses a Line-Interactive topology, which conditions power and switches to battery during outages but does not continuously regenerate the output waveform. It delivers a true sine wave output and is rated at 96% efficiency. Input voltage tolerance spans 82 V to 144 V, providing a wide operating window before the unit transfers to battery.
The GXT5-3KL620RT2UXL uses an On-line double-conversion topology, meaning AC power is continuously converted to DC and back to AC, fully isolating connected equipment from all input power anomalies — voltage sags, surges, frequency variations, and waveform distortion — at all times. Efficiency is specified as up to 98% in Active ECO Mode and up to 95% in on-line mode. Double conversion carries a slight efficiency trade-off in standard on-line mode versus ECO mode, but provides the highest level of isolation.
The core architectural difference is significant: double-conversion (Vertiv) offers superior load isolation and is the standard requirement for sensitive or mission-critical equipment. Line-interactive (APC) is adequate for most IT loads and offers simpler battery transfer mechanics. The GXT5's ENERGY STAR 2.0 certification and up-to-98% ECO mode efficiency are documented; the SMTL3000RM2UCNC's 96% figure is not qualified by operating mode in the provided specs.
Are the input and output voltage configurations compatible with your facility wiring?
The SMTL3000RM2UCNC is a 120 V unit. Its input operates from 82 V to 144 V (nominal 120 V), and its output is fixed at 120 V. Outlets are NEMA 5-15R and NEMA 5-20R — standard North American single-phase receptacles found in most office and light-infrastructure environments. The unit provides 8 AC outlets and a surge energy rating of 459 J.
The GXT5-3KL620RT2UXL is a 208 V unit. Input is specified as 208 VAC nominal via an L6-20P twist-lock plug; output is 208 VAC via 2× L6-15R and 2× L6-20R receptacles. This voltage class requires dedicated 208 V branch circuits and L6-series twist-lock wiring infrastructure — standard in data centers and larger server rooms but absent from typical office branch circuits.
These two units are not wired interchangeably. The SMTL3000RM2UCNC serves 120 V environments; the GXT5-3KL620RT2UXL serves 208 V environments. A buyer must match the UPS to their facility's existing branch circuit voltage and the inlet voltage of their connected equipment. Mixing these in the same deployment is possible only where both voltage tiers exist independently.
What remote monitoring, communication, and management options does each unit provide?
The SMTL3000RM2UCNC includes a USB port and a serial interface as specified. No further detail on network management card support, SNMP capability, or display type is provided in the available specifications.
The GXT5-3KL620RT2UXL provides USB, RS485, RS232, and a terminal block as standard interfaces, plus an external battery connector. Network SNMP and web management are available via the optional Vertiv RDU101 communications card (not included standard). The unit also features a full-color graphic LCD control panel with gravity-sensing orientation for both rack and tower installation. Certifications include ENERGY STAR 2.0, UL1778, c-UL, RoHS2, and REACH.
The Vertiv offers a broader documented interface portfolio and a richer local display. The APC unit's management depth beyond USB and serial is not specified in the provided data — buyers requiring SNMP/network management for the APC model should verify card availability and compatibility separately.
Which should you choose: the SMTL3000RM2UCNC or the GXT5-3KL620RT2UXL?
Our take: The SMTL3000RM2UCNC is the stronger choice when the deployment runs on 120 V branch circuits and requires straightforward line-interactive protection with standard NEMA receptacles for up to 8 devices. The GXT5-3KL620RT2UXL is the stronger choice when the deployment runs on 208 V infrastructure and demands on-line double-conversion isolation. Three concrete deltas: topology (line-interactive vs. double-conversion), output voltage (120 V NEMA vs. 208 V L6), and rated output wattage (2,700 W vs. 3,000 W — the Vertiv delivers more usable watts at the same VA rating). Efficiency favors the Vertiv in ECO mode (up to 98% vs. 96%), though on-line mode drops to up to 95%. These units are not substitutes — facility voltage and load isolation requirements determine which applies. Cross-shopping them is valid only when a buyer is evaluating whether to run 120 V or 208 V infrastructure.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SMTL3000RM2UCNC | Vertiv GXT5-3KL620RT2UXL |
|---|---|---|
| UPS Topology | Line-Interactive | On-line Double Conversion |
| Power Rating (VA) | 3,000 VA | 3,000 VA |
| Power Rating (Watts) | 2,700 W | 3,000 W |
| Input Voltage (Nominal) | 120 V | 208 VAC |
| Input Voltage Range | 82 V – 144 V | 208 VAC nominal; variable by load |
| Output Voltage | 120 V | 208 VAC |
| Input Connector | — | L6-20P |
| Output Receptacles | NEMA 5-15R, NEMA 5-20R | 2× L6-15R, 2× L6-20R |
| Number of AC Outlets | 8 | 4 |
| Waveform | Sine | — |
| Efficiency | 96% | Up to 98% (ECO); up to 95% (on-line) |
| Surge Energy Rating | 459 J | — |
| Noise Level | 55 dB | — |
| Interfaces | USB, Serial | USB, RS485, RS232, Terminal Block |
| Network Management | — | Optional (Vertiv RDU101 SNMP/Webcard) |
| Certifications | — | ENERGY STAR 2.0, UL1778, c-UL, RoHS2, REACH |
| Weight | — | 65.1 lb |
| Dimensions (H × W × D) | — | 3.4 × 16.9 × 21.3 in |
| Operating Temperature | — | +32 to +122 °F (0 to 50 °C) |
Frequently Asked Questions
Which should you choose: the SMTL3000RM2UCNC or the GXT5-3KL620RT2UXL?
The SMTL3000RM2UCNC is the stronger choice when the deployment runs on 120 V branch circuits and requires straightforward line-interactive protection with standard NEMA receptacles for up to 8 devices. The GXT5-3KL620RT2UXL is the stronger choice when the deployment runs on 208 V infrastructure and demands on-line double-conversion isolation. Three concrete deltas: topology (line-interactive vs. double-conversion), output voltage (120 V NEMA vs. 208 V L6), and rated output wattage (2,700 W vs. 3,000 W — the Vertiv delivers more usable watts at the same VA rating). Efficiency favors the Vertiv in ECO mode (up to 98% vs. 96%), though on-line mode drops to up to 95%. These units are not substitutes — facility voltage and load isolation requirements determine which applies. Cross-shopping them is valid only when a buyer is evaluating whether to run 120 V or 208 V infrastructure.
Can I use the SMTL3000RM2UCNC or GXT5-3KL620RT2UXL on a standard office wall outlet?
Only the SMTL3000RM2UCNC is designed for standard North American 120 V circuits — it uses a NEMA input and provides NEMA 5-15R and 5-20R outlets. The GXT5-3KL620RT2UXL requires a 208 VAC branch circuit with an L6-20P twist-lock inlet, which is not a standard office outlet. Plugging a 208 V unit into a 120 V circuit is not supported by the specifications.
Which unit provides better protection for sensitive servers or network equipment?
The GXT5-3KL620RT2UXL uses on-line double-conversion topology, which continuously regenerates the output waveform and fully isolates connected equipment from all input anomalies at all times — the highest available protection class. The SMTL3000RM2UCNC uses line-interactive topology, which is adequate for most IT loads but transfers to battery during significant voltage events rather than continuously filtering the output. For the most sensitive or mission-critical equipment, double-conversion is the documented higher-isolation architecture.
Does either UPS support SNMP or network management for remote monitoring?
The GXT5-3KL620RT2UXL supports SNMP and web management via the optional Vertiv RDU101 communications card (not included standard), plus standard USB, RS485, RS232, and terminal block interfaces. The SMTL3000RM2UCNC lists USB and serial interfaces in the provided specifications; no network management card or SNMP capability is documented in the available spec data. Buyers requiring SNMP on the APC unit should verify management card availability separately before purchasing.
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