APC by Schneider Electric SYH6K6RMT vs APC by Schneider Electric SYH6K6RMT-TF3: Specification Comparison
Both the SYH6K6RMT and SYH6K6RMT-TF3 are APC Symmetra RM rack-mounted double-conversion online UPS units rated at 6 kVA / 4,200 W, positioning them squarely in the same product class for data-center and critical-load buyers. The two SKUs share the same core Symmetra RM platform but differ in input/output connection configuration, battery recharge time, weight, certifications, and several environmental and interface specs—making them a legitimate cross-shop for installers selecting between North American hardwire/twist-lock and mixed-outlet deployments.
In This Guide
- How do the input/output power connections and load capacity differ between the SYH6K6RMT and SYH6K6RMT-TF3?
- Which model offers better battery performance and runtime extensibility?
- How do the two units compare on physical footprint, weight, environmental ratings, and management interfaces?
- Which should you choose: the SYH6K6RMT or the SYH6K6RMT-TF3?
- Side-by-Side Specs
- FAQ
How do the input/output power connections and load capacity differ between the SYH6K6RMT and SYH6K6RMT-TF3?
Both models deliver an identical 6,000 VA / 4,200 W output capacity. Their connection profiles, however, diverge significantly. The SYH6K6RMT accepts input via a single NEMA L6-30P (30 A, 208 V) plug and distributes output across two NEMA L6-20R and one NEMA L6-30R receptacles—an all-208 V twist-lock arrangement suited to high-density rack power distribution in North American data centers. Input also includes one hard-wire 3-wire (2PH + G) connector.
The SYH6K6RMT-TF3 presents a different output mix: four NEMA L5-20R and two NEMA L6-20R receptacles. The L5-20R outlets are 120 V circuits, indicating this variant supports mixed 120/208 V load environments. The SYH6K6RMT-TF3's input frequency is specified at a fixed 60 Hz, while the SYH6K6RMT auto-senses 50/60 Hz ± 5 Hz—a notable advantage for installations requiring frequency flexibility or international grid compatibility.
Input power factor at full load is specified only for the SYH6K6RMT at 0.98, and total harmonic distortion is likewise specified only for that model at less than 5% at full load. These figures are absent from the SYH6K6RMT-TF3 spec sheet provided and cannot be assumed.
Which model offers better battery performance and runtime extensibility?
The SYH6K6RMT ships with three included battery modules (Lead-Acid, type SYBT2), zero empty battery slots, and a manufacturer-rated typical recharge time of 4 hours. Battery life is rated at 3–5 years. The unit supports extendable run time (spec value: 1, indicating this capability is present) and operates on a modular 2 kVA power-increment architecture with 4 total power module slots—3 filled, 1 free—allowing N+1 redundancy scaling to the full 6 kVA without a replacement unit.
The SYH6K6RMT-TF3 specifies a shorter recharge time of 3 hours and explicitly confirms hot-swap battery capability. Its battery technology is identified as Sealed Lead Acid (VRLA). No battery module count, SYBT2 replacement part number, battery life rating, or extendable run-time detail is provided in the SYH6K6RMT-TF3 specs supplied.
For buyers where recharge speed is critical—particularly those cycling through short outages—the SYH6K6RMT-TF3's 3-hour recharge versus the SYH6K6RMT's 4-hour recharge is a concrete operational advantage. The hot-swap battery confirmation on the SYH6K6RMT-TF3 reduces planned maintenance downtime, though the SYH6K6RMT's modular power architecture and documented scalability path are fully specified whereas the TF3's equivalent detail is absent.
How do the two units compare on physical footprint, weight, environmental ratings, and management interfaces?
The SYH6K6RMT occupies 8U of rack space, weighs 294.63 lb (133.64 kg), and ships with a 10 ft (3.05 m) input cable. Its control interface is a multi-function LCD status and control console. Operating altitude is rated to 10,000 ft, acoustic output is 60 dBA, and heat dissipation is 1,771 Btu/h. The unit is specified for front mounting in the lower position of a rack and is not rated for two-post mounting.
The SYH6K6RMT-TF3 weighs considerably more at 176.8 kg (389.8 lb) and ships with a shorter 1.83 m (6 ft) cable. Rack unit count and heat dissipation are not provided for this model. The SYH6K6RMT-TF3 adds documented management interfaces—DB-9 RS-232 and RJ-45—not itemized in the SYH6K6RMT spec sheet, and carries explicit safety and EMC certifications: CSA, FCC Part 15 Class A, and UL 1778. Emergency Power Off (EPO) and audible alarms are confirmed only for the SYH6K6RMT-TF3.
Operating temperature ranges are equivalent on the upper end (40 °C / 104 °F operating max for TF3; the SYH6K6RMT does not state an explicit upper operating temperature in its provided specs). Storage temperature aligns: both specify –15 °C low and 45 °C high. Relative humidity is identical at 0–95% operating and storage for both.
Which should you choose: the SYH6K6RMT or the SYH6K6RMT-TF3?
Our take: The SYH6K6RMT is the stronger choice when the installation is a pure 208 V North American data-center environment requiring documented N+1 scalability, a fully specified modular power architecture, and 50/60 Hz auto-sensing input flexibility. It provides a fully detailed output structure (two L6-20R + one L6-30R), a lighter shipping weight at 133.64 kg versus 176.8 kg for the TF3, a lower acoustic profile (60 dBA documented), and a heat dissipation figure (1,771 Btu/h) useful for HVAC planning. The SYH6K6RMT-TF3 gains ground where mixed 120/208 V outlet coverage is needed (four L5-20R receptacles), where a faster 3-hour battery recharge and confirmed hot-swap battery operation reduce maintenance windows, and where third-party certification compliance (UL 1778, CSA, FCC Part 15 Class A) and built-in EPO are mandatory for the AHJ or insurance carrier. Buyers running 120 V edge loads alongside 208 V infrastructure, or those in jurisdictions requiring UL listing documentation, should favor the TF3.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SYH6K6RMT | APC by Schneider Electric SYH6K6RMT-TF3 |
|---|---|---|
| Output Capacity (VA) | 6,000 VA | 6,000 VA (6 kVA) |
| Output Power (W) | 4,200 W | 4,200 W |
| UPS Topology | Double Conversion Online | — |
| Input Voltage | 208 V | — |
| Output Voltage | 208 V | — |
| Input Connection | NEMA L6-30P (30 A) + 1 Hard Wire 3-wire | — |
| Output Connections | 2x NEMA L6-20R, 1x NEMA L6-30R | 4x NEMA L5-20R, 2x NEMA L6-20R |
| Input Frequency | 50/60 Hz ±5 Hz auto-sensing | 60 Hz |
| Battery Type | Lead-Acid (SYBT2) | Sealed Lead Acid (VRLA) |
| Battery Recharge Time | 4 h | 3 h |
| Hot-Swap Battery | — | Yes |
| Weight | 294.63 lb (133.64 kg) | 176.8 kg (389.8 lb) |
| Cable Length | 10 ft (3.05 m) | 1.83 m (6 ft) |
| Management Interface | Multi-function LCD console | DB-9 RS-232, RJ-45 |
| Emergency Power Off (EPO) | — | Yes |
| Certifications | — | UL 1778, CSA, FCC Part 15 Class A |
| Acoustic Level | 60 dBA | — |
| Heat Dissipation | 1,771 Btu/h | — |
| Operating Altitude | 0–10,000 ft | — |
| Storage Temperature | -15 to 45 °C | -15 to 45 °C |
| Operating Humidity | 0–95% | 0–95% |
| Bypass Type | Internal (Auto + Manual) | — |
| Waveform | Sine wave | — |
| Efficiency at Full Load | 89% | — |
Frequently Asked Questions
Which should you choose: the SYH6K6RMT or the SYH6K6RMT-TF3?
The SYH6K6RMT is the stronger choice when the installation is a pure 208 V North American data-center environment requiring documented N+1 scalability, a fully specified modular power architecture, and 50/60 Hz auto-sensing input flexibility. It provides a fully detailed output structure (two L6-20R + one L6-30R), a lighter shipping weight at 133.64 kg versus 176.8 kg for the TF3, a lower acoustic profile (60 dBA documented), and a heat dissipation figure (1,771 Btu/h) useful for HVAC planning. The SYH6K6RMT-TF3 gains ground where mixed 120/208 V outlet coverage is needed (four L5-20R receptacles), where a faster 3-hour battery recharge and confirmed hot-swap battery operation reduce maintenance windows, and where third-party certification compliance (UL 1778, CSA, FCC Part 15 Class A) and built-in EPO are mandatory for the AHJ or insurance carrier. Buyers running 120 V edge loads alongside 208 V infrastructure, or those in jurisdictions requiring UL listing documentation, should favor the TF3.
Is the SYH6K6RMT or SYH6K6RMT-TF3 better for a pure 208 V data-center rack deployment?
The SYH6K6RMT is better suited for a pure 208 V rack deployment. Its output consists entirely of 208 V twist-lock receptacles (two NEMA L6-20R and one NEMA L6-30R), and its input auto-senses 50/60 Hz. The SYH6K6RMT-TF3's output mix includes four NEMA L5-20R (120 V) receptacles alongside two L6-20R, which is more appropriate for environments serving a blend of 120 V and 208 V loads.
Which model has the faster battery recharge time, and does either support hot-swap batteries?
The SYH6K6RMT-TF3 specifies a faster recharge time of 3 hours versus 4 hours for the SYH6K6RMT. The SYH6K6RMT-TF3 also explicitly confirms hot-swap battery capability. The SYH6K6RMT's spec sheet does not include a hot-swap confirmation, though it does document a modular battery architecture with the SYBT2 replacement module and a rated battery life of 3–5 years.
Does either model carry UL or CSA safety certifications?
Yes—the SYH6K6RMT-TF3 carries documented certifications: UL 1778, CSA, and FCC Part 15 Class A, per its provided specifications. No equivalent certification data is included in the SYH6K6RMT specification sheet provided. Buyers in jurisdictions or facilities requiring third-party safety listing documentation should verify certification status directly with APC for the SYH6K6RMT before specifying it.
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