• Output Power: 55.12 W
• Output Voltage: CH1: 27.6V, CH2: 5V, CH3 (Battery): 26.5V
• Output Current: CH1: 1.3A, CH2: 2.5A, CH3: 0.16A
• Input Voltage Range: 88 – 264 V AC / 124 – 370 V DC, 47 – 63 Hz
• Efficiency: 74%
• Ripple & Noise: CH1: 150 mVp-p, CH2: 100 mVp-p
• Inrush Current: max. 20A @115 VAC / 40A @230 VAC
• Operating Temperature: −10 °C to +60 °C
• Cooling: Free air convection (fanless)
• Protections: Short circuit, Overload, Over voltage, Battery low protection
• Isolation Voltage: 3000 V AC between Input and Output
• Dimensions (L x W x H): 159 mm x 97 mm x 38 mm
• Weight: 570 g
• Safety & EMC Certificates: UL62368-1, TUV BS EN/EN62368-1, EAC TP TC 004
• Special Feature: Integrated UPS function for 24V battery systems
• Manufacturer Warranty: 2 Years

Information about the MEAN WELL ADD-55B

The MEAN WELL ADD-55B is a versatile dual-output power supply with an integrated battery charger, specifically engineered for systems requiring a reliable DC UPS function. By providing a 27.6V main output alongside a 5V logic rail, it serves as a centralized power hub for 24V industrial applications that need simultaneous support for backup batteries and digital controllers. This eliminated the need for separate charging modules, making it a highly cost-effective and space-saving solution for emergency lighting, remote monitoring, and security installations.

Operational safety is a core strength of this unit, highlighted by its comprehensive battery low protection which prevents deep discharge cycles that could lead to permanent battery damage. The fanless design ensures silent operation and minimizes mechanical failure points, while the 74% typical efficiency rating ensures low thermal stress within enclosed control panels. Compliant with international safety standards such as UL62368-1, the ADD-55B offers long-term stability and professional-grade performance for critical infrastructure requiring 24/7 uninterrupted power delivery.