APC by Schneider Electric SYH6K6RMT vs APC by Schneider Electric SYH6K6RMI: Specification Comparison
Both the SYH6K6RMT and SYH6K6RMI are APC Symmetra RM rack-mountable, double-conversion online UPS systems rated at 6 kVA / 4200 W, targeting the same power-protection tier in data center and critical-infrastructure rack deployments. The comparison centers on three decision-relevant axes: output connections and regional voltage compatibility, runtime and battery characteristics, and management interface plus environmental ratings. Neither unit is an accessory or a different device class; cross-shopping between them is appropriate.
In This Guide
- Which model fits your regional outlet standard and load-connection requirements?
- How do the two models compare on runtime, battery configuration, and recharge behavior?
- What management interfaces and environmental operating parameters does each model support?
- Which should you choose: the SYH6K6RMT or the SYH6K6RMI?
- Side-by-Side Specs
- FAQ
Which model fits your regional outlet standard and load-connection requirements?
The SYH6K6RMT is configured for North American installations. Its input arrives via a single NEMA L6-30P (30 A, 208 V) plug, and its output bank delivers (2) NEMA L6-20R plus (1) NEMA L6-30R receptacles — a mix suited to 20 A and 30 A North American equipment. The spec sheet also notes it is configurable for 208 V or 240 V nominal output, giving some flexibility within the North American split-phase environment.
The SYH6K6RMI uses a hard-wire 3-wire input (no plug specified in the provided specs) and routes output through (8) IEC 320 C13 plus (2) IEC 320 C19 receptacles — the international standard form factors used throughout Europe, Asia-Pacific, and global data centers. This outlet configuration directly supports C14 and C20 power cords common on international server and network hardware. The SYH6K6RMT specs do not list IEC outlets, and the SYH6K6RMI specs do not list NEMA outlets, making outlet compatibility a hard regional differentiator rather than a preference.
How do the two models compare on runtime, battery configuration, and recharge behavior?
The SYH6K6RMI provides manufacturer-stated runtime figures: 12.7 minutes at full load (4200 W) and 30.3 minutes at half load (2100 W). It also specifies Emergency Power Off (EPO) support. The SYH6K6RMT specs do not include runtime figures at full or half load, so a direct runtime comparison at specific loads cannot be made from the provided data.
Both units share the same replacement battery cartridge (SYBT2) and the same sealed lead-acid battery chemistry. The SYH6K6RMT specs additionally state: 3 battery modules included, 0 empty battery slots, a typical recharge time of 4 hours, a battery charge power of 458 W, and a battery life of 3–5 years. The SYH6K6RMI specs describe the battery as 'maintenance-free sealed Lead-Acid with suspended electrolyte: leakproof' but do not specify recharge time, battery count, or battery life in the provided data. Extendable run time is confirmed for the SYH6K6RMT (spec value: 1); the SYH6K6RMI specs do not state this explicitly.
What management interfaces and environmental operating parameters does each model support?
The SYH6K6RMI specifies a DB-9 RS-232 serial interface plus an RJ-45 10Base-T Ethernet port supporting web, SNMP, and Telnet management — a meaningful network-management capability for remote monitoring in managed data centers. The SYH6K6RMT lists a multi-function LCD status and control console as its control panel; the provided specs do not list a network management card or Ethernet interface for that model.
On operating environment, the SYH6K6RMT provides more granular data: 0–10,000 ft operating altitude, 0–50,000 ft storage altitude, 60 dBA acoustic output, and 1,771 Btu/h heat dissipation. Input power factor at full load is 0.98, and total harmonic distortion is less than 5% at full load. Efficiency at full load is stated at 89%. The SYH6K6RMI specifies an operating temperature of 0–40 °C and storage temperature of -15–45 °C; the SYH6K6RMT specifies storage temperature of -15–45 °C (matching) but does not separately state an upper operating temperature limit in the provided specs. Neither altitude nor acoustic data is present in the SYH6K6RMI specs.
Which should you choose: the SYH6K6RMT or the SYH6K6RMI?
Our take: The SYH6K6RMT is the stronger choice when deploying in a North American 208 V environment where NEMA L6-series outlets are required and detailed battery and electrical efficiency data matter most. Key spec deltas: (1) outlet format — SYH6K6RMT outputs NEMA L6-20R/L6-30R versus SYH6K6RMI's IEC 320 C13/C19, making them non-interchangeable by region; (2) electrical transparency — SYH6K6RMT documents 89% full-load efficiency, <5% THD, and 0.98 input power factor, none of which appear in the SYH6K6RMI provided specs; (3) management — SYH6K6RMI specifies an RJ-45 Ethernet port with SNMP/web/Telnet, a capability not listed for the SYH6K6RMT. Choose the SYH6K6RMI for international IEC-outlet data centers requiring native network management; choose the SYH6K6RMT for North American rack environments where outlet compatibility and documented electrical characteristics take priority.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SYH6K6RMT | APC by Schneider Electric SYH6K6RMI |
|---|---|---|
| SKU | SYH6K6RMT | SYH6K6RMI |
| Rated capacity (VA) | 6000 VA | 6000 VA |
| Output power (W) | 4200 W | 4200 W |
| UPS topology | Double Conversion Online | — |
| Waveform | Sine wave | — |
| Input voltage | 208 V | — |
| Output voltage | 208 V (configurable 208/240 V) | — |
| Input connection | NEMA L6-30P (30 A) | Hard Wire 3-wire |
| Output connections | (2) NEMA L6-20R, (1) NEMA L6-30R | (8) IEC 320 C13, (2) IEC 320 C19 |
| Emergency Power Off (EPO) | — | Yes |
| Network management interface | — | RJ-45 10Base-T (web/SNMP/Telnet), DB-9 RS-232 |
| Runtime at full load | — | 12.7 min |
| Runtime at half load | — | 30.3 min |
| Battery type | Lead-Acid | Maintenance-free sealed Lead-Acid (suspended electrolyte, leakproof) |
| Replacement battery | SYBT2 | SYBT2 |
| Battery recharge time | 4 h | — |
| Battery life | 3–5 years | — |
| Efficiency at full load | 89% | — |
| Input power factor at full load | 0.98 | — |
| Total harmonic distortion | < 5% at full load | — |
| Acoustic level | 60 dBA | — |
| Heat dissipation | 1771 Btu/h | — |
| Form factor | Rack-mountable, 8U | Rack-mountable |
| Dimensions | 14.02 in (35.6 cm) depth stated | 482.6 x 730.3 x 355.6 mm (W x D x H) |
| Weight | 294.63 lb (133.64 kg) | — |
| Operating temperature | — | 0–40 °C |
| Storage temperature | -15–45 °C | -15–45 °C |
| Operating relative humidity | 0–95% | 0–95% |
| Operating altitude | 0–10,000 ft | — |
| Color | Black | Black |
Frequently Asked Questions
Which should you choose: the SYH6K6RMT or the SYH6K6RMI?
The SYH6K6RMT is the stronger choice when deploying in a North American 208 V environment where NEMA L6-series outlets are required and detailed battery and electrical efficiency data matter most. Key spec deltas: (1) outlet format — SYH6K6RMT outputs NEMA L6-20R/L6-30R versus SYH6K6RMI's IEC 320 C13/C19, making them non-interchangeable by region; (2) electrical transparency — SYH6K6RMT documents 89% full-load efficiency, <5% THD, and 0.98 input power factor, none of which appear in the SYH6K6RMI provided specs; (3) management — SYH6K6RMI specifies an RJ-45 Ethernet port with SNMP/web/Telnet, a capability not listed for the SYH6K6RMT. Choose the SYH6K6RMI for international IEC-outlet data centers requiring native network management; choose the SYH6K6RMT for North American rack environments where outlet compatibility and documented electrical characteristics take priority.
Can I use the SYH6K6RMT or SYH6K6RMI outside the United States?
Based on the provided specs, the SYH6K6RMT uses a NEMA L6-30P input plug and NEMA L6-series output receptacles, which are North American standards and are not compatible with international IEC power cords without adapters. The SYH6K6RMI uses a hard-wire 3-wire input and IEC 320 C13/C19 output receptacles, which are internationally standard. For deployments outside North America, the SYH6K6RMI is the appropriate choice based on outlet specification alone.
Which model supports network-based monitoring and remote management?
The SYH6K6RMI explicitly lists an RJ-45 10Base-T Ethernet interface supporting web, SNMP, and Telnet management, plus a DB-9 RS-232 serial port, in its provided specifications. The SYH6K6RMT specs list only a multi-function LCD control console; no network management card or Ethernet port is specified in the provided data for that model. If remote SNMP or web-based monitoring is a requirement, the SYH6K6RMI has a confirmed interface; the SYH6K6RMT cannot be confirmed to offer this from the specs provided.
How long will the SYH6K6RMI run on battery at full load, and is similar data available for the SYH6K6RMT?
The SYH6K6RMI specs state 12.7 minutes at full load (4200 W) and 30.3 minutes at half load (2100 W). The SYH6K6RMT provided specifications do not include runtime figures at any load level, so a direct comparison cannot be made from the available data. Both models use the same SYBT2 replacement battery cartridge; the SYH6K6RMT specs additionally note a 4-hour typical recharge time and a 3-5 year battery life, which are not stated in the SYH6K6RMI provided specs.
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