What is the ADD-55B typically used for?

The Mean Well ADD-55B is typically used in smaller security and backup-power systems that need a 27.6V main DC output in a dual-output power supply. With 55.12W of rated power and 1.3A on the main 27.6V output, it fits lighter-duty applications where a compact UPS-style supply is sufficient.

Can the ADD-55B support battery-backed security power designs?

Yes. The ADD-55B is positioned as a security power supply with UPS function, so it is suitable for battery-backed DC system designs when the connected load stays within the product's 27.6V, 1.3A, and 55.12W output rating.

Is the ADD-55B a better fit for lower-power 27.6V loads than the ADD-155B?

Yes, when the load is relatively small. The ADD-55B provides a 27.6V main output like the ADD-155B, but at 55.12W and 1.3A rather than 152.75W and 4.5A. That makes the ADD-55B a better fit when you need the same output class without the larger power capacity.

Will the ADD-55B run from common 120V and 240V AC mains?

Yes. The listed AC input range is 88-264VAC, so the ADD-55B can operate from common AC mains systems within that range, including typical 120V and 240V supplies. That helps keep deployments flexible across sites.

How does the ADD-55B compare with other ADD series models?

The ADD-55B is the smaller option in this group, delivering 55.12W with a 27.6V main output at 1.3A in a dual-output design. The ADD-155B provides 152.75W at 27.6V and 4.5A, while the ADD-155C provides 149.9W at 54V and 2.3A. The choice depends on the main output voltage you need and how much power margin your system requires.

Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

Mean Well

Mean Well ADD-55B Security Power Supply 55.12W 27.6V 5V 1.3A - UPS, Dual output

built-in PFC function100% full load burn-in testfixed switching frequency at PFC 67KHzPWM 134KHz single outputUPS function with additional 5V output

SKU:

ADD-55B

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The ADD is a 155W Mean Well. power converter. and an input range of 88~264VAC.

Key Features

✓ Input voltage range: 88~264VAC
✓ DC output voltage adjustable ±10%
✓ 3KVAC reinforced I/O isolation
✓ Cooling by free air convection
✓ Protections: Short circuit / Overload / Over voltage
✓ Active PFC — meets international energy efficiency regulations
✓ Safety approvals: EN61000-3-2,-3
✓ 3 years warranty

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Model	Power	Voltage	Current	Battery Voltage
Mean Well ADD-55A Security Power Supply 52.58W 13.8V 5V 2.5A - UPS, Dual output	52.58W	13.8V	2.5A	13.4V	View
Mean Well ADD-155C Security Power Supply 149.9W 54V 5V 2.3A - UPS, Dual output	149.9W	54V	2.3A	53.5V	View
Mean Well ADD-155B Security Power Supply 152.75W 27.6V 5V 4.5A - UPS, Dual output	152.75W	27.6V	4.5A	27.1V	View
Mean Well ADD-155A Security Power Supply 152.75W 13.8V 5V 9.5A - UPS, Dual output	152.75W	13.8V	9.5A	13.3V	View

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Key Features

✓ Input voltage range: 88~264VAC

✓ DC output voltage adjustable ±10%

✓ 3KVAC reinforced I/O isolation

✓ Cooling by free air convection

✓ Protections: Short circuit / Overload / Over voltage

✓ Active PFC — meets international energy efficiency regulations

✓ Safety approvals: EN61000-3-2,-3

✓ 3 years warranty

Mean Well ADD-55B Security Power Supply 55.12W 27.6V 5V 1.3A - UPS, Dual output

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Mean Well ADD-55B Security Power Supply 55.12W 27.6V 5V 1.3A - UPS, Dual output

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