• Output Power: 120 W (Primary CH1: 104.88 W + Charger CH2: 15.18 W)
• Output Voltage: CH1: 27.6 V DC (adjustable 21.6 – 29 V), CH2: 27.6 V DC
• Output Current: CH1: 0 – 3.8 A, CH2: 0.55 A (Battery Charging)
• Input Voltage Range: 90 – 264 V AC / 127 – 370 V DC, 47 – 63 Hz
• Efficiency: 88%
• Ripple & Noise: ≤ 150 mVp-p
• Inrush Current: max. 30 A @ 115 VAC / 55 A @ 230 VAC
• Standby Consumption: < 100 µA (Battery static discharge current)
• Operating Temperature: −20 °C to +60 °C
• Cooling: Fanless free air convection
• Protections: Short circuit, Overload, Over voltage, Over temperature, Battery low voltage, Battery reverse polarity
• Overvoltage Category: OVC II
• Isolation Voltage: 3000 V AC between input and output
• Dimensions (L x W x H): 159 mm x 97 mm x 30 mm
• Weight: approx. 420 g
• Safety & EMC Standards: UL 62368-1, BS EN/EN 62368-1, AS/NZS 62368.1, EAC TP TC 004, GB 17945-2010
• Status Indicators & Signals: TTL signals (AC OK, Battery disconnect/reverse polarity, Battery low, Battery full, Discharge)
• Warranty: 3 Years

Information about MEAN WELL LAD-120B

Engineered around a 27.6 V DC primary rail, the MEAN WELL LAD-120B pairs an AC/DC power supply with an intelligent battery charger and backup UPS unit within a slim 1U footprint. The system safeguards connected batteries against accidental reverse connection without causing component damage, while physical ON/OFF switches isolate circuits for safe field maintenance. Open-collector TTL status monitoring outputs transmit real-time telemetry regarding AC line health, low-battery thresholds, and system discharge state directly to supervisory controllers. Designed with a robust 3 kVAC isolation voltage and operating entirely under silent convection cooling, it offers an ideal powering solution for critical security infrastructure and emergency evacuation systems.