APC by Schneider Electric SRT5KTF vs APC by Schneider Electric SRT5KRMTF: Specification Comparison
The APC Smart-UPS SRT 5KTF and SRT5KRMTF are both 5kVA step-down isolation transformers in APC's Smart-UPS SRT accessory line, designed to convert 208V input to 120V output for facilities where SRT-series UPS units must power 120V loads from a 208V feed. The fundamental comparison axis is physical deployment architecture — tower versus 2U rackmount — along with the downstream outlet configuration and the environmental/installation envelope each unit demands. Neither unit contains a battery or inverter; both are passive transformer accessories.
In This Guide
Which form factor and mounting architecture fits your installation?
The SRT5KTF is a tower unit. Its published dimensions are 130 mm wide × 660 mm deep × 432 mm tall, with a shipping weight of 6.35 kg (package). It is designed to sit alongside a tower-format SRT UPS on a floor or shelf surface. No rack-unit count is specified in its documentation.
The SRT5KRMTF is a 2U rackmount unit. It mounts horizontally in a standard equipment rack, occupying 2U of rack space, with a mounting position specified as front-mount horizontal. Its published unit weight is 95.00 lb (43.09 kg) — dramatically heavier than the SRT5KTF's 5.67 kg unit weight. This weight difference is significant for rack load calculations and physical handling during installation.
Installers working in a rack-dense data center or IDF/MDF environment will find the SRT5KRMTF integrates cleanly into existing rack infrastructure. Tower deployments, UPS closets, or installations where rack space is unavailable or at a premium are better served by the SRT5KTF.
What are the electrical interface and load capacity specifications?
The SRT5KRMTF publishes its electrical parameters explicitly: 208V input via a NEMA L6-30P plug, 120V output across 12 NEMA 5-20R receptacles, with a maximum line current of 24A and an input current limit of 30A. Load capacity is stated as 5000VA. This gives installers precise circuit-planning data: a dedicated 30A, 208V circuit with an L6-30 receptacle is required.
The SRT5KTF provides no electrical interface specifications in the supplied data — input voltage, output voltage, input connector type, output receptacle count and type, and load current ratings are all absent from its published spec sheet. Buyers must consult APC's full datasheet or product manual to confirm electrical compatibility before procurement.
For installers who need to pre-specify circuit breaker sizing, outlet counts for load distribution, or confirm NEMA connector compatibility, the SRT5KRMTF's published specs support that process directly; the SRT5KTF's published specs do not.
What are the operating and storage environmental limits for each unit?
Operating temperature: the SRT5KTF is rated 0–40 °C. The SRT5KRMTF does not publish an explicit operating temperature range in the provided specifications.
Operating relative humidity: both units share the same rating — 0–95% (non-condensing per the SRT5KRMTF's notation; condensing status not stated for the SRT5KTF).
Storage temperature: the SRT5KTF is rated –15 to 40 °C. The SRT5KRMTF is rated –15 to 45 °C (5–113 °F), giving it a slightly wider upper storage temperature limit of 5 °C over the SRT5KTF.
Operating altitude: the SRT5KRMTF specifies 0–10,000 ft (approximately 3,048 m). The SRT5KTF does not publish an operating altitude rating. The SRT5KRMTF's storage altitude is rated to 50,000 ft (15,240 m); the SRT5KTF does not publish this figure.
For installations at elevation — remote sites, high-altitude facilities, or mountainous regions — the SRT5KRMTF's explicit 10,000 ft operating altitude rating provides documented assurance. The SRT5KTF's omission of this figure is a gap buyers should resolve with APC directly before specifying for non-sea-level sites.
Which should you choose: the SRT5KTF or the SRT5KRMTF?
Our take: The SRT5KRMTF is the stronger choice when the installation is rack-based and the buyer needs fully documented electrical specifications at the time of procurement. The SRT5KRMTF publishes its complete electrical profile — 208V NEMA L6-30P input, 12 NEMA 5-20R outlets, 30A input current limit, 5000VA load capacity — while the SRT5KTF provides none of these figures in its available spec sheet, creating a procurement gap that must be resolved separately. The SRT5KRMTF also carries an explicit 10,000 ft operating altitude rating absent from the SRT5KTF. Conversely, the SRT5KTF's 5.67 kg unit weight versus the SRT5KRMTF's 43.09 kg makes physical handling and non-rack placement vastly simpler. Choose the SRT5KTF for tower or floor-standing deployments where rack space is unavailable; choose the SRT5KRMTF for rack-integrated 208V-to-120V step-down in data center or structured-cabling environments where outlet count and circuit specs must be confirmed upfront.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SRT5KTF | APC by Schneider Electric SRT5KRMTF |
|---|---|---|
| Device Class | Step-down isolation transformer | Step-down transformer |
| Load Capacity | — | 5000VA |
| Form Factor | Tower | 2U Rackmount |
| Mounting Mode | Floor / shelf (tower) | Rack-mounted, horizontal |
| Rack Units | — | 2U |
| Unit Weight | 5.67 kg (12.5 lb) | 43.09 kg (95.00 lb) |
| Input Voltage | — | 208V |
| Output Voltage | — | 120V |
| Input Connector | — | NEMA L6-30P |
| Input Current Limit | — | 30A |
| Max Line Current | — | 24A |
| Output Receptacles | — | 12 × NEMA 5-20R |
| Operating Temperature | 0–40 °C | — |
| Storage Temperature | –15 to 40 °C | –15 to 45 °C |
| Operating Humidity | 0–95% | 0–95% non-condensing |
| Operating Altitude | — | 0–10,000 ft |
| Color | Black | Black |
| Shipping Weight | 6.35 kg | — |
Frequently Asked Questions
Which should you choose: the SRT5KTF or the SRT5KRMTF?
The SRT5KRMTF is the stronger choice when the installation is rack-based and the buyer needs fully documented electrical specifications at the time of procurement. The SRT5KRMTF publishes its complete electrical profile — 208V NEMA L6-30P input, 12 NEMA 5-20R outlets, 30A input current limit, 5000VA load capacity — while the SRT5KTF provides none of these figures in its available spec sheet, creating a procurement gap that must be resolved separately. The SRT5KRMTF also carries an explicit 10,000 ft operating altitude rating absent from the SRT5KTF. Conversely, the SRT5KTF's 5.67 kg unit weight versus the SRT5KRMTF's 43.09 kg makes physical handling and non-rack placement vastly simpler. Choose the SRT5KTF for tower or floor-standing deployments where rack space is unavailable; choose the SRT5KRMTF for rack-integrated 208V-to-120V step-down in data center or structured-cabling environments where outlet count and circuit specs must be confirmed upfront.
Can I use either transformer in a standard equipment rack?
Only the SRT5KRMTF is specified for rack mounting — it occupies 2U and mounts horizontally in a standard rack. The SRT5KTF is a tower unit and no rack-mount kit or rack-unit count is listed in its published specifications. If your deployment is rack-based, the SRT5KRMTF is the appropriate model.
What input plug does each transformer require, and what outlets does each provide?
The SRT5KRMTF requires a NEMA L6-30P input (208V, 30A circuit) and provides 12 NEMA 5-20R output receptacles. The SRT5KTF's input connector type, output receptacle type, and outlet count are not published in its available spec sheet — buyers must consult APC's full product documentation before specifying circuit and outlet requirements.
Is either unit suitable for a high-altitude installation, such as a site above 5,000 feet?
The SRT5KRMTF explicitly rates its operating altitude at 0–10,000 ft (approximately 3,048 m), which covers most high-altitude commercial installations in North America. The SRT5KTF does not publish an operating altitude specification. For sites at significant elevation, the SRT5KRMTF provides documented assurance; the SRT5KTF would require direct confirmation from APC before it could be specified for high-altitude use.
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