APC by Schneider Electric SURT15KRMXLT-TF5 Rack-Mount Online UPS
Overview
The APC by Schneider Electric SURT15KRMXLT-TF5 is a rack-mount online double-conversion UPS engineered for demanding commercial and data center environments where power quality, outlet density, and emergency shutoff capability are non-negotiable. With an input operating range of 160–280V and a broad 50/60 Hz frequency window, this unit handles the kind of voltage swings common in industrial facilities, server rooms, and large-format security infrastructure without switching to battery unnecessarily — preserving battery runtime for real outages. The 18-outlet configuration and mix of NEMA 5-20R, NEMA L6-20R, and NEMA L6-30P receptacles makes this a practical fit for mixed-load rack environments where you're powering both standard and high-draw equipment from a single UPS. For APC rack power and UPS systems, this sits at the high-capacity end of the commercial line.
Key Features
- 94% Operating Efficiency: At 94% efficiency, the SURT15KRMXLT-TF5 wastes significantly less energy as heat compared to older online UPS designs that typically run 88–91%. In a 24/7 data center or security operations center, that delta compounds into measurable annual utility savings — and less cooling load on the room.
- 160–280V Input Range: The wide input voltage window (160V minimum, 280V maximum) means the unit stays on utility power through browndowns and over-voltage events that would trip a narrower-tolerance UPS onto battery. Fewer unnecessary battery cycles translates directly to longer battery service life.
- 50/60 Hz Auto-Sensing Input: Accepts both 50 Hz and 60 Hz input, which matters for facilities that may receive mixed utility feeds or for deployments that need a single SKU to work across international sites.
- 18 AC Outlets — Mixed NEMA Configuration: Eighteen receptacles spanning NEMA 5-20R (standard 20A), NEMA L6-20R (locking 240V 20A), and NEMA L6-30P (locking 240V 30A) let you consolidate diverse rack loads — servers, NVRs, PoE switches, and 240V network appliances — under a single UPS rather than deploying separate units per load type.
- Emergency Power Off (EPO): Hard-wired EPO support lets facility managers or safety systems kill UPS output instantly in an emergency — required by electrical codes in many raised-floor data centers and security command rooms. If your facility's safety plan calls for EPO, this is the spec to verify before selecting a UPS.
- 5% Output Voltage THD: Total harmonic distortion on the output is held to 5%, which keeps sensitive electronics — RAID controllers, VMS servers, network switches — operating within their designed power tolerance. High THD from cheaper UPS units can shorten the life of power supplies and introduce errors in storage systems.
- 5% Input Current THD: Low input-side THD (5%) reduces interference pushed back onto the facility's electrical distribution. This matters in environments where multiple sensitive systems share a panel — a UPS that pollutes its own input branch can create problems upstream.
- 50 dB EMI/RFI Noise Filtering: The 50 dB attenuation rating means conducted EMI and RFI on the incoming line are substantially suppressed before reaching connected equipment. In security infrastructure environments near radio transmitters, motor-driven HVAC, or industrial automation gear, this level of filtering reduces the likelihood of noise-induced equipment faults.
- 3:1 Crest Factor Tolerance: A 3:1 crest factor rating means the UPS can supply the peak current demands of non-linear loads — switching power supplies, variable-frequency drives, and modern server PSUs — without clipping. Many lower-cost UPS units are rated 1.5:1 or 2:1, which starves non-linear loads during peak draw and can cause UPS fault trips.
- Overload Protection: On-board overload protection guards both the UPS and connected equipment when aggregate load exceeds rated capacity, preventing a misconfigured rack from causing a hard failure across all connected devices simultaneously.
- Audible Alarm: Local audible alarm signals fault conditions — on-battery operation, overload, low battery — without requiring a network connection or management software to be configured first. Useful during commissioning and in environments where the UPS is physically accessible.
- 3 Serial Ports: Three DB-9 RS-232 serial ports support legacy management interfaces and out-of-band device connections — relevant when integrating with older security management systems, environmental monitors, or serial-console servers that don't have native network management ports.
Integration and Compatibility
The SURT15KRMXLT-TF5 (often searched as SURT15KRMXLT TF5) includes an RJ-45 10/100 Base-T network port for SNMP-based remote monitoring and a Smart-Slot expansion bay for optional network management cards, enabling integration with data center infrastructure management (DCIM) platforms and UPS monitoring software. The DB-9 RS-232 interface provides legacy serial connectivity for environments that manage UPS status through serial-connected building management systems. The Power and UPS category includes compatible management accessories. For PoE network switches and NVR infrastructure that this UPS would typically back up, verify that total connected load stays within rated output capacity. The EPO terminal requires coordination with your facility's electrical contractor during installation — consult your local electrical code for EPO wiring requirements in raised-floor or data center environments. For guidance on sizing UPS capacity to your specific load, review the UPS sizing and runtime guide.
Frequently Asked Questions
Q: What outlet types does the SURT15KRMXLT-TF5 provide?
A: The SURT15KRMXLT-TF5 has 18 AC outlets across three NEMA types: NEMA 5-20R (standard 20A), NEMA L6-20R (locking 240V 20A), and NEMA L6-30P (locking 240V 30A plug). This mix supports both standard and higher-voltage rack loads from a single unit.
Q: Does the SURT15KRMXLT-TF5 support Emergency Power Off (EPO)?
A: Yes. The SURT15KRMXLT-TF5 includes hard-wired EPO support, which allows the UPS output to be cut instantly via a remote switch or building safety system. EPO is required by electrical code in many data center and raised-floor environments.
Q: What is the input voltage range for the SURT15KRMXLT-TF5?
A: The unit accepts input from 160V to 280V, covering a wide range of utility voltage conditions. This broad tolerance reduces unnecessary battery cycling during browndowns or over-voltage events.
Q: How efficient is the SURT15KRMXLT-TF5?
A: The SURT15KRMXLT-TF5 operates at 94% efficiency, which is above average for online double-conversion UPS units and results in lower heat output and reduced energy cost compared to less efficient designs.
Q: What management interfaces does the SURT15KRMXLT-TF5 include?
A: It includes an RJ-45 10/100 Base-T network management port, three DB-9 RS-232 serial ports, and an APC Smart-Slot expansion bay for optional network management cards. This supports both IP-based SNMP monitoring and legacy serial management.
Q: What is the output voltage THD on the SURT15KRMXLT-TF5?
A: Output voltage Total Harmonic Distortion is held to 5%, which keeps sensitive connected equipment — servers, storage systems, network appliances — within their designed power tolerance and reduces stress on power supplies.
The SURT15KRMXLT-TF5 is the unit I reach for when a rack environment has genuinely mixed outlet requirements and the facility team needs EPO wired into their safety interlock. The 94% efficiency rating is the number that gets attention in budget conversations — on a 24/7 load profile, that gap versus an 88% unit adds up to meaningful annual savings in both electricity and cooling, and it's a verifiable spec rather than a marketing claim.
Technical Highlights:
- 94% Efficiency: Measurably reduces heat dissipation versus older online UPS topologies — directly lowers cooling load in the rack room, which compounds into operating cost savings at scale.
- 160–280V Input Range: The wide tolerance window is operationally significant — it keeps the unit on utility power through the browndown events that commonly occur during peak demand periods, extending battery service intervals.
- 3:1 Crest Factor: Supports non-linear loads like modern server switching PSUs without fault trips — a spec that lower-tier UPS units routinely fail on when the rack is fully populated with switching-supply equipment.
Deployment Considerations:
- EPO wiring requires coordination with a licensed electrician and must comply with local electrical code — plan this into the installation timeline before rack commissioning, not after.
- The three RS-232 serial ports are a genuine asset for legacy integration but verify your building management system's serial protocol against the APC management card documentation before assuming compatibility — RS-232 pinouts vary across BMS vendors.
The SURT15KRMXLT-TF5 is the right fit for a security operations center or mid-size server room where the load mix includes both 120V and 240V equipment, EPO is a code requirement, and the facility team needs network-manageable UPS infrastructure they can monitor without being on-site.
