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APC Smart-UPS 3U rackmount unit with LCD display and six NEMA 5-15R outlets

APC

APC SMTL1500RM3UC Smart-UPS 1500VA 1350W Lithium-ion Rackmount 3U 120V 6 NEMA 5-15R Short Depth

SKU CH-6W1Y-E7RGQ

Line-interactive 1500 VA lithium-ion UPS with pure sine wave output, six NEMA 5-15R outlets, SmartConnect cloud monitoring and 11.9-inch short-depth 3U rackmount design

  • Voltage version120 V
  • AC input voltage82–144 V
  • Input line frequency50/60 Hz +/- 3 Hz
  • Power inputNEMA 5-15P
  • Volt-ampere rating1500 VA
  • Power rating1350 W
  • Lithium-ion battery delivers up to 3x longer life than lead-acid models
  • 1500 VA and 1350 W pure sine wave output protects sensitive equipment
  • depth 11.9 inch rackmount fits space-constrained 3U enclosures
  • Built-in SmartConnect cloud monitoring plus SmartSlot for optional network cards
  • Automatic voltage regulation corrects 82 to 144 V input without battery drain

Purpose & Fit

The APC SMTL1500RM3UC is a 1500 VA, 1350 W line-interactive UPS built for 120 V environments. Its 3U rackmount chassis measures only 11.9 inches deep, making it suitable for short-depth cabinets. Lithium-ion chemistry reduces weight to 43 lbs and extends expected battery life to 5-10 years. Six NEMA 5-15R outlets provide battery-backed power for servers, network gear or sensitive electronics.

Sustained Load Behaviour

Under continuous demand the unit delivers pure sine-wave output at 120 V, maintaining voltage within the 82-144 V input window through automatic voltage regulation. Lithium-ion cells recharge fully in about 2 hours, supporting repeated discharge cycles without the capacity fade common in lead-acid designs. Typical transfer time is 6 ms with a 10 ms maximum, keeping connected loads running during brief utility interruptions.

Pre-Installation Checks

Verify that your rack can accommodate a 3U high, 17.25-inch wide unit with 11.89-inch depth and 43 lb weight. Confirm the site supplies 120 V via a NEMA 5-15P receptacle for the 8-foot input cord. Ensure the 680 joule surge rating meets your protection requirements and that the SmartConnect cloud monitoring or an optional SmartSlot card fits your management workflow.

How it compares

Measured against everything we stock in Uninterruptible Power Supplies (UPS), at today’s prices. Recalculated every night.

Price $777.99
Cheaper than about 56% of the 1,153 comparable items (median $948.99).

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Specifications

Product
Brand nameAPC
Model nameSMTL1500RM3UC
VariantSMTL1500RM3UC
Power
Voltage version120 V
AC input voltage82–144 V
Input line frequency50/60 Hz +/- 3 Hz
Power inputNEMA 5-15P
Volt-ampere rating1500 VA
Power rating1350 W
Voltage output120 V
AC output frequency50/60 Hz +/- 3 Hz (auto sensing)
Power outlets6
Battery typeLithium Ion
Battery charge time2 h
Surge protection rating680 Joules
Watt1350 W
Size & build
Product dimensions5.14 in × 17.25 in × 11.89 in
Product weight43 lb (19.5 kg)
Environment & compliance
Regulatory approvalsCSA C22.2 NO. 107.3, FCC Part 15 Class A, NOM, UL 1778, UL 1973
More details
VA1500 VA

Questions about this item

How much heat does the 1350 W lithium-ion UPS produce during continuous operation?

The unit uses a line-interactive topology with automatic voltage regulation, which runs cooler than double-conversion designs; the lithium-ion battery also generates less heat than lead-acid equivalents under the same load.

What input plug and circuit does the NEMA 5-15P connection require?

It ships with an 8 ft NEMA 5-15P cord, so a standard 120 V 15 A branch circuit and matching wall receptacle are all that is needed.

Will the 6 ms typical transfer time protect legacy servers with older power supplies?

Yes, the 6 ms typical and 10 ms maximum switch-over is well within the hold-up time of most legacy ATX and redundant power supplies, and the pure sine-wave output ensures compatibility with active PFC units.

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