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Enclosed dual-output power supply unit, metal casing, screw terminals visible

Mean Well

Mean Well AD-55A 51.38W Dual Output Power Supply

SKU CH-EYGR-W4SSQ

Enclosed dual-output AC-DC supply delivering 51.38 W at 13.8 V and 13.4 V for security and emergency systems

  • Product typeAT
  • Dual 13.8 V and 13.4 V outputs suit security and alarm systems
  • 38 W total power handles emergency lighting loads
  • Channel one delivers 3.5 A for primary equipment
  • Channel two supplies 0.23 A for backup circuits
  • Enclosed AT-type chassis protects components in installed environments

Dual-Output Security Power Supply

The Mean Well AD-55A is an enclosed AC-DC switching unit rated at 51.38W. It is built for emergency lighting, security monitoring and alarm installations that need two regulated rails from a single compact chassis.

51.38W split across 13.8V and 13.4V rails

Channel one delivers 13.8V at 3.5A while channel two provides 13.4V at .23A. This fixed voltage split decides whether the unit matches your load; systems needing different voltages or higher current on the second rail cannot use this supply.

Simple two-wire output per channel

Each rail connects with standard screw terminals so wiring is straightforward. The main risk is reversing polarity on the low-current 13.4V side or exceeding the 3.5A limit on the primary rail, either of which will trigger protection or damage the load.

How it compares

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

Price $78.99
Cheaper than about 76% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeAT

Questions about this item

What does the 51.38 W rating mean for a security system?

It powers a 13.8 V rail at 3.5 A for the main load and a 13.4 V rail at 0.23 A for auxiliary circuits.

How does the AT type affect compatibility with alarm panels?

The AT form factor fits standard enclosures used in emergency lighting and security monitoring gear.

What mounting provisions does the enclosed chassis provide?

The enclosed case has standard fixing holes for panel or DIN-rail installation in control cabinets.

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