Which input plug and output receptacle configuration matches your facility's power infrastructure?

The GXT5-3KL620RT2UXL uses an L6-20P input plug, rated for 20 A at 208 VAC. Its output bank provides 2 × L6-15R receptacles and 2 × L6-20R receptacles — a total of four outlets, with the highest single-outlet rating at 20 A.

The GXT5-3KL630RT2UXL uses an L6-30P input plug, rated for 30 A at 208 VAC. Its output bank provides 2 × L6-15R receptacles and 2 × L6-30R receptacles — again four outlets, but with the two primary outlets rated at 30 A each.

The practical consequence is upstream circuit sizing. The L6-20P model requires a dedicated 208 VAC / 20 A circuit (typically breaker-protected at 20 A per NEC 80% rule, yielding 16 A continuous). The L6-30P model requires a 208 VAC / 30 A circuit (24 A continuous). Installers must verify which circuit type exists at the rack position before selecting a model; neither model ships with a plug adapter, and field re-wiring is outside the provided spec data.

Do the two models differ in power capacity, efficiency, or expected runtime under load?

Both units are rated identically at 3,000 VA / 3,000 W, giving a unity power factor — no derating is required when sizing connected loads up to 3,000 W. Input voltage nominal is 208 VAC for both, with output voltage fixed at 208 VAC.

Efficiency figures are also identical: up to 98% in Active ECO Mode and up to 95% in standard on-line double-conversion mode. These figures are drawn directly from the provided specifications; neither model shows a measured efficiency advantage over the other.

Runtime data is not included in the provided specifications for either model. Battery capacity, runtime curves, and optional external battery connector support (listed under Interface Options for both) would need to be evaluated using Vertiv's published runtime tables or the Vertiv Energy Analyzer tool, which are outside the scope of the supplied spec sheets.

Are there differences in management interfaces, certifications, or environmental ratings between the two models?

Management interfaces are identical across both models: USB, RS485, RS232, terminal block, and an external battery connector are all standard. SNMP and web management require the optional Vertiv RDU101 communications card on both units; this card is not included as standard on either.

Both models carry the same certification portfolio: ENERGY STAR 2.0, UL1778, c-UL, RoHS2, and REACH. Neither model holds a certification the other lacks based on the provided specifications.

Environmental ratings are identical: operating temperature range of +32 to +122 °F (0 to 50 °C) for both. Physical dimensions — 3.4 in H × 16.9 in W × 21.3 in D — and weight at 65.1 lb are the same, confirming both occupy the same 2U rack footprint and require the same mounting hardware.

Which should you choose: the GXT5-3KL620RT2UXL or the GXT5-3KL630RT2UXL?

Our take: The GXT5-3KL620RT2UXL is the correct choice when your rack position is fed by a 208 VAC / 20 A circuit with an L6-20P receptacle; the GXT5-3KL630RT2UXL is the correct choice when your circuit is 208 VAC / 30 A with an L6-30P receptacle. Beyond wiring, every measurable spec is identical: both deliver 3,000 VA / 3,000 W at unity power factor, both achieve up to 98% efficiency in ECO mode and up to 95% in on-line mode, and both weigh 65.1 lb in a 2U rack/tower chassis. The output receptacles mirror the input — L6-20R on the 20 A model, L6-30R on the 30 A model — so downstream device cords must also match. Select based solely on available circuit type; there is no performance, management, or compliance reason to prefer one over the other.

Side-by-Side Comparison

Spec-for-spec, from manufacturer data.

Frequently Asked Questions

Related Resources

• Vertiv GXT5-3KL620RT2UXL product page — full specs and to add to a quote
• Vertiv GXT5-3KL630RT2UXL product page — full specs and to add to a quote