APC by Schneider Electric SRT5KRMXLT-IEC vs APC by Schneider Electric SRT5KXLT-IEC: Specification Comparison
Both the SRT5KRMXLT-IEC and the SRT5KXLT-IEC are APC Smart-UPS SRT 5000VA double-conversion online UPS units rated at 5 kVA / 4250 W with IEC outlets, targeting the same power-protection tier. The core difference is form factor and output voltage flexibility: the SRT5KRMXLT-IEC is a rackmount unit fixed at 208 V output, while the SRT5KXLT-IEC is a tower/standalone unit with a wider output voltage range of 208–240 V. This comparison examines how those distinctions affect deployment suitability.
In This Guide
Which form factor and installation profile fits your deployment?
The SRT5KRMXLT-IEC is explicitly a rackmount (RM) unit, as indicated by its model designation. This makes it purpose-built for data center racks or IT equipment cabinets where rack-unit space is allocated and cable management is rack-centric. Its AC outlet complement — C13 couplers, C19 couplers, and IEC Jumpers — reflects a rack-distribution topology typical of server environments.
The SRT5KXLT-IEC carries no rackmount designation, indicating a tower or floor-standing form factor suited to wiring closets, standalone server rooms, or environments where rack space is unavailable or undesirable. Its outlet configuration is not specified in the provided specs, which is a gap buyers should resolve with the manufacturer before purchase.
Neither unit's physical dimensions, weight, or rack-unit height are provided in the supplied specifications, so buyers cannot compare footprint or rack-space consumption from these data alone.
Which unit supports a broader range of load voltage requirements?
Output voltage is the sharpest differentiator between these two models. The SRT5KRMXLT-IEC specifies a single output voltage of 208 V. Loads requiring 240 V cannot be powered from this unit as specified.
The SRT5KXLT-IEC specifies an output voltage range of 208–240 V, meaning it can serve equipment rated for either voltage level. This is a meaningful advantage in mixed-voltage environments — for example, facilities running a combination of North American 208 V three-phase panels and international or high-density 240 V single-phase equipment.
Both units share identical input parameters: 100–275 V operating range and 40–70 Hz input frequency, so neither holds an advantage on the input side. Output power capacity (5 kVA / 4250 W), waveform (sine), THD (2%), crest factor (3:1), surge energy rating (480 J), and output frequency (50/60 Hz) are identical across both models.
How do the management, alarm, and protection feature sets compare?
Both units are specified with web-based management, audible alarms, auto-restart, and surge protection (480 J). These are the complete management and protection attributes listed for the SRT5KRMXLT-IEC.
The SRT5KXLT-IEC adds one notable feature not present in the SRT5KRMXLT-IEC specs: Emergency Power Off (EPO). EPO allows a facility-level emergency shutoff signal to immediately de-energize the UPS output — a code requirement in many data center and commercial electrical installations (e.g., NEC Article 645). Buyers in jurisdictions or facilities requiring EPO compliance must note this difference.
Surge protection is explicitly listed for the SRT5KRMXLT-IEC but not for the SRT5KXLT-IEC. However, given that both units share identical 480 J surge energy ratings, this is likely a documentation gap rather than a true capability difference. Buyers should confirm with APC documentation before treating it as a disqualifier. Noise level is identical at 55 dB for both units.
Which should you choose: the SRT5KRMXLT-IEC or the SRT5KXLT-IEC?
Our take: The SRT5KXLT-IEC is the stronger choice when output voltage flexibility and Emergency Power Off (EPO) compliance are required. Concretely: (1) output voltage — the SRT5KXLT-IEC supports 208–240 V versus the SRT5KRMXLT-IEC's fixed 208 V, enabling compatibility with a broader range of IEC-standard loads; (2) EPO — only the SRT5KXLT-IEC specifies an EPO input, a requirement in many regulated data center and commercial environments; (3) outlet types — the SRT5KRMXLT-IEC explicitly lists C13, C19, and IEC Jumper outputs suited to rackmount power distribution, while the SRT5KXLT-IEC outlet configuration is unspecified in these data. The SRT5KRMXLT-IEC is the correct selection for standard rack deployments at a fixed 208 V where EPO is not required and a defined rack-distribution outlet mix (C13/C19) is preferred. Both units are otherwise electrically identical at 5 kVA / 4250 W with the same input range, THD, crest factor, and surge rating.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SRT5KRMXLT-IEC | APC by Schneider Electric SRT5KXLT-IEC |
|---|---|---|
| UPS Topology | Double-conversion (Online) | Double-conversion (Online) |
| Output Power Capacity | 5 kVA | 5 kVA |
| Output Power | 4250 W | 4250 W |
| Waveform | Sine | Sine |
| Form Factor | Rackmount (RM) | Tower (non-rackmount) |
| Output Voltage | 208 V | 208–240 V |
| Input Voltage Range | 100–275 V | 100–275 V |
| Input Frequency | 40–70 Hz | 40–70 Hz |
| Output Frequency | 50/60 Hz | 50/60 Hz |
| Surge Energy Rating | 480 J | 480 J |
| Crest Factor | 3:1 | 3:1 |
| Output Voltage THD | 2% | 2% |
| Noise Level | 55 dB | 55 dB |
| Emergency Power Off (EPO) | — | Yes |
| Surge Protection | Yes | — |
| AC Outlet Types | C13, C19, IEC Jumpers | — |
| Web-Based Management | Yes | Yes |
| Audible Alarms | Yes | Yes |
| Auto-Restart | Yes | Yes |
Frequently Asked Questions
Which should you choose: the SRT5KRMXLT-IEC or the SRT5KXLT-IEC?
The SRT5KXLT-IEC is the stronger choice when output voltage flexibility and Emergency Power Off (EPO) compliance are required. Concretely: (1) output voltage — the SRT5KXLT-IEC supports 208–240 V versus the SRT5KRMXLT-IEC's fixed 208 V, enabling compatibility with a broader range of IEC-standard loads; (2) EPO — only the SRT5KXLT-IEC specifies an EPO input, a requirement in many regulated data center and commercial environments; (3) outlet types — the SRT5KRMXLT-IEC explicitly lists C13, C19, and IEC Jumper outputs suited to rackmount power distribution, while the SRT5KXLT-IEC outlet configuration is unspecified in these data. The SRT5KRMXLT-IEC is the correct selection for standard rack deployments at a fixed 208 V where EPO is not required and a defined rack-distribution outlet mix (C13/C19) is preferred. Both units are otherwise electrically identical at 5 kVA / 4250 W with the same input range, THD, crest factor, and surge rating.
Can the SRT5KXLT-IEC power equipment that requires 240 V while the SRT5KRMXLT-IEC cannot?
Based on the provided specifications, yes. The SRT5KXLT-IEC lists an output voltage range of 208–240 V, whereas the SRT5KRMXLT-IEC specifies only 208 V output. If your loads require 240 V, the SRT5KXLT-IEC is the appropriate choice per these specs.
Does either UPS support Emergency Power Off (EPO) for data center code compliance?
Only the SRT5KXLT-IEC specifies Emergency Power Off (EPO) in the provided specifications. The SRT5KRMXLT-IEC does not list EPO. Buyers in facilities where EPO is required by code (such as NEC Article 645 computer room installations) should select the SRT5KXLT-IEC or verify EPO availability with APC directly before purchasing the rackmount model.
Is the SRT5KRMXLT-IEC or SRT5KXLT-IEC better suited for a standard server rack environment?
The SRT5KRMXLT-IEC is purpose-built for rack installation, as indicated by its RM designation and its specified C13, C19, and IEC Jumper outlet mix — the standard connector types for rack-mounted servers and networking gear. The SRT5KXLT-IEC has no rackmount designation and its outlet types are not specified in the available data. For a standard 19-inch rack deployment at 208 V without an EPO requirement, the SRT5KRMXLT-IEC is the more directly applicable option per these specifications.
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