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Rectangular black power adapter with barrel connector and AC plug

ARRIS

ARRIS NBSA36120300HU power adapter 12V 3A 36W

SKU CH-AQD3-1344G MPN NBSA36120300HU

Supplies 12 V at 3 A for 36 W output, accepting 100-240 V input at 50-60 Hz

  • Delivers 36 W output for reliable device operation
  • Accepts 100 to 240 V input for worldwide compatibility
  • Supplies 12 V at 3 A to match equipment requirements
  • Built-in safeguards protect against incorrect voltage, short circuit and overheating
  • Genuine ARRIS part NBSA36120300HU ensures correct fit and performance

Product identity

The ARRIS NBSA36120300HU is a 36 W AC power adapter rated for 12 V at 3 A. It replaces a lost or faulty supply for networking equipment and similar 12 V devices. The unit accepts 100-240 V input at 50-60 Hz for worldwide mains compatibility. Buyers needing a different voltage or higher current should look elsewhere.

Thermals noise and power

The adapter draws up to 1.2 A from the mains and delivers a steady 12 V 3 A output. Built-in safeguards protect against incorrect voltage, short circuit and internal overheating during normal operation. No active cooling is present so the unit runs silently. Continuous full-load use will warm the enclosure as expected for a compact supply.

Upgrade context

This model suits users whose original 12 V 3 A adapter has failed or gone missing. It is not a higher-wattage upgrade and will not support devices that require more than 36 W. The P/N 579761-019-00 matches the original manufacturer specification for direct replacement. Buyers needing greater output capacity must select a different unit.

Highlights

  • Delivers 36 W output for reliable device operation
  • Accepts 100 to 240 V input for worldwide compatibility
  • Supplies 12 V at 3 A to match equipment requirements
  • Built-in safeguards protect against incorrect voltage, short circuit and overheating
  • Genuine ARRIS part NBSA36120300HU ensures correct fit and performance

Specifications

ModelNBSA36120300HU

Questions about this item

How do I connect the 100-240V input to mains power without damaging the adapter?

Plug the IEC C7 figure-8 mains lead into the adapter inlet, then into a grounded wall socket; the 100-240V 1.2A 50-60Hz auto-ranging input handles any region. The step users miss is confirming the socket earth is live before powering on.

What part will need replacement first if the adapter runs continuously at 12V 3A?

The internal electrolytic capacitors on the 12V 3A output rail age fastest under sustained 36W load; expect capacity loss after several years of 24/7 operation.

At what load does the over-temperature protection engage during prolonged use?

The built-in internal-overheating safeguard trips when the 36W supply exceeds its thermal limit, cutting output until the chassis cools; this is the first hard limit under continuous full-load operation.

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