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Rectangular metal enclosed power supply unit with side ventilation slots

Mean Well

Mean Well NES-100-9 100.8W 9V 11.2A power supply

SKU CH-P0AR-VJRTV

Enclosed AC-DC switching supply delivers 100.8 W at 9 V and 11.2 A for low-power systems

  • Product typeAT
  • 8 W output powers demanding 9 V equipment
  • 2 A continuous current supports stable operation
  • Enclosed AT-type chassis protects internal components
  • New-generation switching design reduces overall volume
  • Two-year quality assurance backs long-term reliability

What the NES-100-9 delivers

This Mean Well unit is a 100.8 W enclosed switching supply that converts AC mains to a regulated 9 V output at 11.2 A. It targets integrators who need a compact, single-rail DC source for industrial equipment, test benches or custom low-voltage systems.

Installation notes and common pitfalls

The AT-type form factor fits standard chassis cut-outs and uses screw terminals for both input and output wiring. Installers should verify the AC voltage selector before powering on; a mismatched setting is the most frequent cause of start-up failure. Allow adequate airflow around the enclosure because the fanless design relies on convection cooling.

Behaviour under continuous load

At full 100.8 W the supply maintains stable voltage with minimal ripple thanks to the updated switching topology. Thermal protection engages if the case temperature exceeds the internal limit, automatically resetting once the unit cools. Efficiency stays consistent over long runs, so the output current remains reliable for extended test cycles or permanent installations.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $70.99
Cheaper than about 79% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeAT

Questions about this item

How can I confirm the NES-100-9 is delivering 9V at 11.2A after installation?

Measure the output terminals with a multimeter under load; a reading near 9V and current draw up to 11.2A shows the unit is operating within its 100.8W rating.

What ships with the NES-100-9 and what must I source separately?

The box contains the enclosed switching power supply only; AC mains cable, mounting hardware and any load-side connectors are not included.

Which NES-100 variant should I select for a 9V 100W project?

Choose the NES-100-9 model, rated for 9V at 11.2A and 100.8W, matching the voltage and power requirement directly.

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