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Mean Well

Mean Well AD-55B Security Power Supply 53.92W 27.6V 1.8A - UPS

100% full load burn-in testfixed switching frequency at 45KHzUPS function
SKU AD-55B
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Select model — 5 in this family

AD-55B
In stock
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Overview

AD-55B is the model of this series: rated power 53.92W, typical efficiency 74%.

Features

  • Universal AC input / Full range
  • Protections: Short circuit / Overload / Over voltage
  • Battery low protections
  • Cooling by free air convection
  • 100% full load burn-in test
  • Fixed switching frequency at 45KHz
  • 2 years warranty

Specifications

AD-55BSpecifications from the official datasheet (2024-09-30 edition)

OUTPUT

OUTPUT NUMBER
CH1 / CH2
DC VOLTAGE CH1
27.6V
DC VOLTAGE CH2
26.5V
RATED CURRENT CH1
1.8A
RATED CURRENT CH2
0.16A
CURRENT RANGE CH1
0 ~ 2A
CURRENT RANGE CH2
--------
RATED POWER
53.92W
RIPPLE & NOISE (max.) CH1Note.2
100mVp-p
RIPPLE & NOISE (max.) CH2Note.2
--------
VOLTAGE ADJ. RANGE
CH1: 24 ~ 29V
VOLTAGE TOLERANCE CH1Note.3
±1.0%
VOLTAGE TOLERANCE CH2Note.3
--------
LINE REGULATION CH1
±0.5%
LINE REGULATION CH2
--------
LOAD REGULATION CH1
±0.5%
LOAD REGULATION CH2
--------
SETUP, RISE TIME
800ms, 50ms/230VAC 1600ms, 50ms/115VAC at full load
HOLD UP TIME (Typ.)
80ms/230VAC 16ms/115VAC at full load

INPUT

VOLTAGE RANGE
88 ~ 264VAC 124 ~ 370VDC
FREQUENCY RANGE
47 ~ 63Hz
EFFICIENCY (Typ.)
74%
AC CURRENT (Typ.)
1.6A/115VAC 1A/230VAC
INRUSH CURRENT (Typ.)
COLD START 20A/115VAC 40A/230VAC
LEAKAGE CURRENT
<1mA / 240VAC

PROTECTION

OVERLOAD
105 ~ 150% rated output power Protection type : AC Charging Mode : Hiccup mode, recovers automatically after fault condition is removed UPS Mode : Protected by internal fuse
OVER VOLTAGE
CH1:31.74 ~ 37.26V Protection type : Hiccup mode, recovers automatically after fault condition is removed
BATTERY LOW
20 ~ 22V

FUNCTION

DC ALARM SIGNAL(OPTIONAL)
AC fail CN1 PIN2 Battery low under charge voltage 82.5%±2% CN1 PIN1 Normal 0.8V max. Abnormal 5V±0.5V

ENVIRONMENT

WORKING TEMP.
-10 ~ +60℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-20 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0~50℃) on CH1 output
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS
UL62368-1, TUV BS EN/EN62368-1, AS/NZS 62368.1, EAC TP TC 004 approved
WITHSTAND VOLTAGE
I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
ISOLATION RESISTANCE
I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION
Compliance to BS EN/EN55032 (CISPR32) Class B, BS EN/EN61000-3-2,-3, EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11, BS EN/EN55035, light industry level, EAC TP TC 020

OTHERS

MTBF
2380.9K hrs min. Telcordia SR-332 (Bellcore) ; 548.7K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
159*97*38mm (L*W*H)
PACKING
0.5Kg; 24pcs/12.6Kg/0.83CUFT
Test conditions and notes5
  1. 1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
  2. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
  3. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 360mm*360mm metal plate with 1mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
  5. 5. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).

Technical drawings

AD-55B Mechanical Specification
Mechanical Specification
AD-55B Block Diagram
Block Diagram
AD-55B Derating Curve
Derating Curve

Downloads

FAQ

What is the Mean Well AD-55B designed for?

The AD-55B is a security power supply intended for applications that need a regulated 27.6V DC output with UPS functionality. It is suited to security and enclosed power supply use cases where backup-related operation is part of the product requirement. This model is part of Mean Well's AD series and is rated at 53.92W.

What are the main output specifications of the AD-55B?

This model provides a 27.6V DC output at a rated 1.8A (0-2A current range), adjustable from 24 to 29V. Its rated output power is 53.92W. Those specifications make it a fit for loads that require this voltage and current range.

Does the AD-55B support a wide AC input range?

Yes. The AD-55B accepts 88 to 264VAC, and it also supports 124 to 370VDC input. That wide input range helps when the same model needs to be used across different regional mains standards.

What protection features are included in the AD-55B?

The AD-55B includes overload and over-voltage protection. It also includes battery low protection (20 to 22V), which is relevant to its UPS-oriented design. Overload protection is specified at 105% to 150% of rated output power, and over-voltage protection trips at 31.74V to 37.26V on CH1.

What operating environment is the AD-55B rated for?

The AD-55B is specified for operation from -10°C to +60°C, with load derating per the derating curve. Full rated load requires forced airflow of at least 18.2CFM (fan at 10cm); without a fan the load must be reduced. Buyers should confirm the enclosure, airflow and ambient conditions stay within the derating curve.

What certifications and compliance standards does the AD-55B meet?

This model is approved to UL62368-1, TUV BS EN/EN62368-1, AS/NZS 62368.1, and EAC TP TC 004 safety standards. Its EMC compliance includes EN55032 Class B, EN61000-3-2, EN61000-3-3, and multiple EN61000-4 immunity standards. These approvals can matter for commercial and professional security power supply projects.

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Mean Well AD-55B Security Power Supply 53.92W 27.6V 1.8A - UPS
Mean Well

Mean Well AD-55B Security Power Supply 53.92W 27.6V 1.8A - UPS

Log in to see price

AD-55B is the model of this series: rated power 53.92W, typical efficiency 74%.

Features

  • Universal AC input / Full range
  • Protections: Short circuit / Overload / Over voltage
  • Battery low protections
  • Cooling by free air convection
  • 100% full load burn-in test
  • Fixed switching frequency at 45KHz
  • 2 years warranty

Model

  • 13.8V 151W
  • 26.7V 155W
  • 54V 156W
  • 13.8V 51W
  • 26.7V 54W
View product

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