APC by Schneider Electric DLRT8KRMXLT vs APC by Schneider Electric SRT8KRMXLT-IEC: Specification Comparison
Both the DLRT8KRMXLT and SRT8KRMXLT-IEC are APC Smart-UPS SRT 8000VA rack-mountable, double-conversion online UPS units rated at 8 kVA / 8000 W. They occupy the same power tier and device class, making them legitimate cross-shop candidates for data-center, server-room, and critical-load deployments requiring true online topology. The primary differentiators lie in outlet configuration, output voltage flexibility, available management visibility specs, and load-side compatibility — particularly the North American NEMA outlet set on the DLRT8KRMXLT versus the IEC C13/C19 outlet set on the SRT8KRMXLT-IEC.
In This Guide
Which unit matches your load-side outlet and voltage requirements?
Both units deliver 8000 VA / 8000 W with a pure sine wave output. The DLRT8KRMXLT provides six AC outlets split between NEMA L6-20R and NEMA L6-30R receptacles, with a specified output voltage range of 208–240 V, giving it flexibility to serve loads wired for either voltage. The SRT8KRMXLT-IEC instead equips IEC C13 and IEC C19 couplers — the international standard connectors found on most rack servers, PDUs, and networking gear globally — and its spec lists a single output voltage maximum of 208 V with no minimum stated. Buyers must match their existing power strips, PDUs, and server power supplies to the outlet type on the UPS; these two connector families are not interchangeable without adapters.
How do efficiency ratings and runtime/management capabilities compare?
The DLRT8KRMXLT specifies both an on-line mode efficiency of 94% and an ECO mode efficiency of 98%, giving administrators a documented efficiency figure to factor into operating-cost calculations. The SRT8KRMXLT-IEC does not provide efficiency percentages in the supplied specification data. The SRT8KRMXLT-IEC does specify a noise level of 55 dB and a 2% output voltage Total Harmonic Distortion (THD) — neither of which is listed for the DLRT8KRMXLT. The SRT8KRMXLT-IEC also lists web-based management capability, whereas no equivalent management interface is noted in the DLRT8KRMXLT specs. Both units share auto-restart and audible alarm features; EPO (Emergency Power Off) is listed only for the SRT8KRMXLT-IEC.
Do input tolerance and power-quality specs differ between the two?
Input voltage tolerance is identical for both: 100–275 V operating range and 40–70 Hz frequency band, indicating the same wide-range input design for tolerance to utility fluctuations. Surge energy rating is also equal at 480 J on both models. The SRT8KRMXLT-IEC adds a crest factor specification of 3:1, indicating its ability to handle loads with high peak-to-RMS current ratios — relevant for non-linear loads such as switching power supplies in servers. No crest factor is specified for the DLRT8KRMXLT. Output THD of 2% is specified only for the SRT8KRMXLT-IEC, providing a concrete power-quality data point that the DLRT8KRMXLT specification does not supply.
Which should you choose: the DLRT8KRMXLT or the SRT8KRMXLT-IEC?
Our take: The DLRT8KRMXLT is the stronger choice when the installation uses North American NEMA L6-20R and L6-30R wiring and when documented efficiency in both online (94%) and ECO (98%) modes is a requirement for energy reporting or operating-cost justification — specs the SRT8KRMXLT-IEC does not provide. The SRT8KRMXLT-IEC is the appropriate selection for facilities using IEC C13/C19 power distribution, international rack environments, or deployments that require web-based management and Emergency Power Off (EPO) — capabilities not listed for the DLRT8KRMXLT. The SRT8KRMXLT-IEC also documents a 2% output THD and a 3:1 crest factor, useful assurances for sensitive or non-linear server loads, while the DLRT8KRMXLT offers output voltage flexibility across 208–240 V versus the single 208 V maximum listed for the IEC model. Select based on outlet ecosystem and management requirements, not on power capacity, which is identical.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric DLRT8KRMXLT | APC by Schneider Electric SRT8KRMXLT-IEC |
|---|---|---|
| UPS Topology | Double-conversion (Online) | Double-conversion (Online) |
| Output Power Capacity | 8 kVA | 8 kVA |
| Output Power | 8000 W | 8000 W |
| Waveform | Sine | Sine |
| Input Voltage Range | 100–275 V | 100–275 V |
| Input Frequency | 40–70 Hz | 40–70 Hz |
| Output Voltage | 208–240 V | 208 V (max only specified) |
| Output Frequency | 50/60 Hz | 50/60 Hz |
| Surge Energy Rating | 480 J | 480 J |
| AC Outlet Types | NEMA L6-20R, NEMA L6-30R | IEC C13, IEC C19 |
| AC Outlet Quantity | 6 | — |
| Efficiency (Online Mode) | 94% | — |
| Efficiency (ECO Mode) | 98% | — |
| Output Voltage THD | — | 2% |
| Crest Factor | — | 3:1 |
| Noise Level | — | 55 dB |
| Web-Based Management | — | Yes |
| Emergency Power Off (EPO) | — | Yes |
| Auto-Restart | Yes | — |
| Audible Alarm | Yes | Yes |
| Surge Protection | Yes | Yes |
Frequently Asked Questions
Which should you choose: the DLRT8KRMXLT or the SRT8KRMXLT-IEC?
The DLRT8KRMXLT is the stronger choice when the installation uses North American NEMA L6-20R and L6-30R wiring and when documented efficiency in both online (94%) and ECO (98%) modes is a requirement for energy reporting or operating-cost justification — specs the SRT8KRMXLT-IEC does not provide. The SRT8KRMXLT-IEC is the appropriate selection for facilities using IEC C13/C19 power distribution, international rack environments, or deployments that require web-based management and Emergency Power Off (EPO) — capabilities not listed for the DLRT8KRMXLT. The SRT8KRMXLT-IEC also documents a 2% output THD and a 3:1 crest factor, useful assurances for sensitive or non-linear server loads, while the DLRT8KRMXLT offers output voltage flexibility across 208–240 V versus the single 208 V maximum listed for the IEC model. Select based on outlet ecosystem and management requirements, not on power capacity, which is identical.
Can I use the DLRT8KRMXLT or SRT8KRMXLT-IEC with standard rack server power cables?
That depends on your server's power supply connectors. Most rack servers ship with IEC C13 or C19 power cords, which plug directly into the SRT8KRMXLT-IEC's outlets. The DLRT8KRMXLT uses NEMA L6-20R and L6-30R receptacles, which require twist-lock NEMA power cords or an adapter — not a standard included server cable. If your servers and PDUs already use IEC connectors, the SRT8KRMXLT-IEC avoids the need for adapter cables.
Which unit is better suited for monitoring and remote management?
Based on the provided specifications, the SRT8KRMXLT-IEC lists web-based management as a feature; the DLRT8KRMXLT does not include that specification. If remote visibility through a browser interface is a requirement for your operations team, the SRT8KRMXLT-IEC is the documented choice. No network management card details are specified for either unit in the data supplied.
Does either UPS support Emergency Power Off for data-center safety compliance?
Emergency Power Off (EPO) is listed as a feature only on the SRT8KRMXLT-IEC. The DLRT8KRMXLT specification does not mention EPO. If your data-center design or local electrical code requires an EPO circuit — common in raised-floor facilities — the SRT8KRMXLT-IEC is the unit with a documented EPO capability based on the specs provided.
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