APC by Schneider Electric SYAF8KT vs APC by Schneider Electric SRT8KRMXLT: Specification Comparison
The SYAF8KT and SRT8KRMXLT are both APC 8 kVA online (double-conversion) UPS units targeting data center, server room, and critical-infrastructure buyers who require zero-transfer-time power conditioning. The SYAF8KT is a modular tower frame from the Symmetra LX series, designed for scalable N+1 redundancy. The SRT8KRMXLT is a self-contained 6U rackmount unit from the Smart-UPS On-Line series. This comparison examines their power and output architecture, input flexibility and environmental tolerance, and monitoring and protection features.
In This Guide
- How do the SYAF8KT and SRT8KRMXLT differ in output capacity, voltage, and load compatibility?
- Which unit offers broader input voltage and frequency tolerance for diverse or unstable utility feeds?
- What monitoring, alarm, and surge-protection capabilities does each unit provide?
- Which should you choose: the SYAF8KT or the SRT8KRMXLT?
- Side-by-Side Specs
- FAQ
How do the SYAF8KT and SRT8KRMXLT differ in output capacity, voltage, and load compatibility?
Both units are rated at 8,000 VA. The SRT8KRMXLT specifies an output power of 8,000 W, yielding a unity (1.0) power factor. The SYAF8KT does not provide a watt rating or power factor figure in the supplied specs, so a direct watts comparison cannot be made.
Output voltage coverage differs significantly. The SYAF8KT delivers AC 120/208/240 V at 47–63 Hz via a hardwire 4-wire (2PH+N+G) connection — a single hardwired output intended for downstream distribution panels or PDUs. The SRT8KRMXLT outputs 208–240 V at 50/60 Hz and provides four NEMA L6-20R receptacles plus two NEMA L6-30R receptacles, enabling direct connection of individual loads without an intermediate distribution panel.
Waveform quality is specified only for the SRT8KRMXLT (pure sine wave); the SYAF8KT spec does not state waveform type. The SRT8KRMXLT also publishes a crest factor of 3:1, indicating tolerance for high-crest loads such as switched-mode power supplies. Neither metric is available for the SYAF8KT.
Which unit offers broader input voltage and frequency tolerance for diverse or unstable utility feeds?
The SRT8KRMXLT accepts input from 100 V to 275 V, covering a 175 V range, and accommodates input frequencies from 40 Hz to 70 Hz. This wide window makes it suitable for international deployments, generator-fed environments with frequency drift, or facilities with unstable utility voltage.
The SYAF8KT specifies an input voltage of AC 208/240 V (a fixed dual-voltage hardwire input) and an input frequency requirement of 45–65 Hz — a narrower range on both dimensions. The SYAF8KT's input is also hardwired (4-wire, 2PH+N+G), requiring a dedicated panel circuit rather than a plug-in connection.
For installations where utility power quality is variable or where the unit may be deployed across multiple voltage environments, the SRT8KRMXLT's broader input tolerance is a concrete spec advantage. The SYAF8KT's hardwire-only input assumes a controlled, purpose-built electrical environment.
What monitoring, alarm, and surge-protection capabilities does each unit provide?
The SRT8KRMXLT specifies web-based management, audible alarms, and auto-restart capability. It also publishes a surge energy rating of 480 J and an input current Total Harmonic Distortion (THD) of 2%, indicating low harmonic injection back onto the utility feed. Noise level is stated at 55 dB.
The SYAF8KT lists an LCD display as its sole stated management/monitoring feature. No web-based management, audible alarm, auto-restart, surge energy rating, THD figure, or noise level is provided in the supplied specifications. Because the SYAF8KT is a Symmetra LX modular frame, it is designed to operate with separately purchased intelligence and network management modules; those capabilities are not reflected in the specs provided here.
Buyers who require out-of-box remote monitoring and management without additional module purchases will find more stated functionality in the SRT8KRMXLT's specification set. For the SYAF8KT, management capability depends on additional hardware not described in the provided specs.
Which should you choose: the SYAF8KT or the SRT8KRMXLT?
Our take: The SRT8KRMXLT is the stronger choice when the buyer needs a self-contained, rack-integrated 8 kVA online UPS with broad input tolerance and out-of-box management. Its input window spans 100–275 V versus the SYAF8KT's fixed 208/240 V hardwire input, making it suitable for a wider range of facility and international deployments. It delivers 8,000 W at unity power factor with six direct-connect NEMA receptacles, while the SYAF8KT provides only a single hardwired output with no watt rating stated in the supplied specs. The SRT8KRMXLT also includes web-based management, audible alarms, auto-restart, a 480 J surge rating, and 2% input THD — none of which appear in the SYAF8KT's provided spec sheet. The SYAF8KT is appropriate for large-scale modular deployments requiring N+1 frame-level redundancy in a tower configuration, where downstream distribution and intelligence modules are separately provisioned.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SYAF8KT | APC by Schneider Electric SRT8KRMXLT |
|---|---|---|
| UPS Topology | Online | Double-conversion (Online) |
| Output Capacity (VA) | 8,000 VA | 8,000 VA |
| Output Power (Watts) | — | 8,000 W |
| Power Factor | — | 1.0 (8kW / 8kVA) |
| Form Factor | Tower frame (external cabinet) | Rackmount, 6U |
| Input Voltage | AC 208/240 V (fixed) | 100–275 V (range) |
| Input Frequency | 45–65 Hz | 40–70 Hz |
| Input Connector | Hardwire 4-wire (2PH+N+G) | — |
| Output Voltage | AC 120/208/240 V | 208–240 V |
| Output Frequency | 47–63 Hz | 50/60 Hz |
| Output Connectors | 1x Hardwire 4-wire (2PH+N+G) | 4x L6-20R + 2x L6-30R |
| Waveform | — | Sine |
| Crest Factor | — | 3:1 |
| Surge Energy Rating | — | 480 J |
| Input Current THD | — | 2% |
| Web-Based Management | — | Yes |
| Audible Alarms | — | Yes |
| Auto-Restart | — | Yes |
| Noise Level | — | 55 dB |
| Display | LCD | — |
Frequently Asked Questions
Which should you choose: the SYAF8KT or the SRT8KRMXLT?
The SRT8KRMXLT is the stronger choice when the buyer needs a self-contained, rack-integrated 8 kVA online UPS with broad input tolerance and out-of-box management. Its input window spans 100–275 V versus the SYAF8KT's fixed 208/240 V hardwire input, making it suitable for a wider range of facility and international deployments. It delivers 8,000 W at unity power factor with six direct-connect NEMA receptacles, while the SYAF8KT provides only a single hardwired output with no watt rating stated in the supplied specs. The SRT8KRMXLT also includes web-based management, audible alarms, auto-restart, a 480 J surge rating, and 2% input THD — none of which appear in the SYAF8KT's provided spec sheet. The SYAF8KT is appropriate for large-scale modular deployments requiring N+1 frame-level redundancy in a tower configuration, where downstream distribution and intelligence modules are separately provisioned.
Can I plug servers directly into the SRT8KRMXLT, or do I need a separate PDU like the SYAF8KT requires?
Yes. The SRT8KRMXLT provides six built-in NEMA receptacles (four L6-20R and two L6-30R) for direct load connections. The SYAF8KT outputs power via a single hardwire 4-wire connection, which typically feeds a downstream distribution panel or PDU — direct device plug-in is not supported based on the provided specs.
Is the SYAF8KT or SRT8KRMXLT better suited for a rack-mounted data center environment?
The SRT8KRMXLT is explicitly a 6U rackmount unit and integrates directly into standard equipment racks. The SYAF8KT is specified as a tower frame (power array cabinet — external), making it a floor-standing installation. Buyers with rack-constrained environments should select the SRT8KRMXLT.
Does the SYAF8KT support remote or network-based monitoring out of the box?
The provided specifications for the SYAF8KT list only an LCD display as a monitoring feature. Web-based management is not stated in the supplied specs. The Symmetra LX platform is designed to accept separately purchased network management modules, but those capabilities are not described in the spec data provided. The SRT8KRMXLT explicitly specifies web-based management as an included feature.
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