APC Smart-ups VT Subfeed Distribution 208V (5) L21-20 & (1) 50A HW Output - SUVTOPT104

APC by Schneider Electric SUVTOPT104 Smart-UPS VT Subfeed Distribution Module

Overview

The SUVTOPT104 is APC's subfeed distribution option for the Smart-UPS VT platform, delivering 208V power across five L21-20 receptacles and one 50A hardwire output. If you're deploying a Smart-UPS VT in a data center, server room, or critical infrastructure environment and need to distribute load across multiple downstream circuits without a separate PDU cabinet, this module integrates directly into the UPS enclosure — keeping your distribution architecture tight and your floor space accounted for. For context on the broader APC by Schneider Electric power protection line, the Smart-UPS VT family is their three-phase modular UPS range aimed at medium to large enterprise deployments.

Key Features

• Five L21-20 Output Receptacles: The L21-20 (20A, 3-phase, 208V) twist-lock format is the standard connection for rackmount PDUs, 3-phase ATS switches, and high-density server equipment. Five circuits give you meaningful distribution flexibility without daisy-chaining external strips — a common source of maintenance headaches in dense racks.
• One 50A Hardwire Output: The single 50A hardwired output handles high-draw downstream loads — think large storage arrays, network chassis, or a secondary PDU feeding a full rack — where a receptacle connection would be undersized or code-noncompliant.
• 208V 3-Phase Distribution: Operating at 208V matches the output of the Smart-UPS VT's delta-wye transformer stage. Keeping distribution at 208V rather than stepping down to 120V preserves efficiency and reduces conductor sizing requirements for longer runs in larger machine rooms.
• Operating Temperature Range 0–40°C: The full 0–40°C operating window covers standard data center environments (ASHRAE A1/A2 classes). The storage range extends to -50°C, so the unit ships and stores without special climate handling.
• Operating Humidity 0–95% (non-condensing): Matches typical raised-floor and enclosed server room humidity envelopes — no derating needed in most commercial mechanical environments.
• Compact Form Factor — 145 × 175 × 1035 mm: At roughly 1U wide and just under 1.1 meters tall (the 1035mm height dimension suggests a vertical rackmount or tower-integrated form factor consistent with Smart-UPS VT enclosure integration), the module adds distribution capacity without consuming significant additional footprint.

Integration and Compatibility

The SUVTOPT104 is designed as an option module for the Smart-UPS VT series — it is not a standalone PDU and requires a compatible Smart-UPS VT host UPS for installation. Verify compatibility with your specific Smart-UPS VT model and kVA rating before ordering; APC's Smart-UPS VT lineup spans multiple frame sizes and not all subfeed options are interchangeable across the range. For power distribution planning in larger deployments, pair this with upstream APC breaker modules and downstream rackmount PDUs appropriate for your load profile. If your deployment requires monitoring at the circuit level, review whether your Smart-UPS VT's network management card supports per-outlet telemetry — the SUVTOPT104 itself provides physical distribution, not active metering. Consult an uninterruptible power supply specialist or APC's configuration tools to confirm this module matches your UPS enclosure revision and local electrical code requirements for 208V 3-phase distribution.

Frequently Asked Questions

Q: What UPS platform is the SUVTOPT104 designed for?

A: The SUVTOPT104 is an option module for the APC Smart-UPS VT series. It is not a standalone product and requires a compatible Smart-UPS VT host enclosure.

Q: What output connections does the SUVTOPT104 provide?

A: It provides five L21-20 (20A, 208V, 3-phase twist-lock) receptacles and one 50A hardwire output for high-draw downstream circuits.

Q: What is the operating temperature range for the SUVTOPT104?

A: The operating range is 0–40°C, which covers standard ASHRAE A1/A2 data center environments. Storage temperature extends down to -50°C.

Q: What are the physical dimensions of the SUVTOPT104?

A: The module measures 145mm (W) × 175mm (D) × 1035mm (H).

Q: Can the SUVTOPT104 be used with any 208V UPS, or only Smart-UPS VT?

A: Based on available specifications, the SUVTOPT104 is designed as an option module for the Smart-UPS VT platform specifically. Verify compatibility with APC's configuration documentation before installation in any non-VT enclosure.

Eden Phillips

The SUVTOPT104 addresses a specific gap in Smart-UPS VT deployments: once you have the UPS in place, distributing 208V 3-phase power to five downstream circuits plus a single 50A hardwire connection without adding a separate enclosure is exactly what this module is for. At 28 lbs and 1035mm tall, it's sized to integrate with the VT cabinet rather than sit beside it.

Technical Highlights:

• Five L21-20 Receptacles: 20A twist-lock at 208V 3-phase — the correct connector standard for rackmount PDUs and 3-phase ATS units in enterprise environments. Five circuits is enough to feed a multi-rack zone from a single subfeed without external splitters.
• 50A Hardwire Output: Designed for loads that exceed what a single L21-20 can carry — large storage arrays or secondary distribution panels. Hardwired termination keeps the connection code-compliant for sustained high-draw service.
• 0–40°C Operating Range: Aligns with standard data center thermal envelopes; no special cooling accommodation required within normal raised-floor or enclosed server room conditions.

Deployment Considerations:

• This module requires a compatible Smart-UPS VT host enclosure — confirm your UPS frame revision and kVA class against APC's option compatibility matrix before procurement to avoid a mismatch.
• The SUVTOPT104 provides physical distribution only; active per-circuit metering depends on the network management card fitted to the host UPS, not the module itself.

Best suited for medium-to-large machine room deployments where a Smart-UPS VT is already the selected UPS platform and the project requires integrated 208V 3-phase subfeed distribution without a dedicated PDU cabinet — typical in colocation buildouts and enterprise server rooms with space-constrained power infrastructure.