• Input Voltage Range: 90 – 264 V AC (277 V AC operational) / 128 – 370 V DC (390 V DC operational)
• Input Frequency Range: 47 – 63 Hz
• Rated Output Voltage: 24 V DC
• Voltage Adjustment Range: 20.4 – 25.2 V (via built-in potentiometer)
• Rated Output Current: 20 A
• Current Adjustment Range: 10 – 20 A (via built-in potentiometer)
• Rated Output Power: 480 W
• Efficiency (Typ.): 94.5%
• Power Factor (Typ.): PF ≥ 0.98 @ 115 V AC, PF ≥ 0.97 @ 230 V AC, PF ≥ 0.95 @ 277 V AC (at full load)
• Ripple & Noise (Max.): 200 mV p-p
• Voltage Tolerance: ±1.0%
• Line Regulation: ±0.5%
• Load Regulation: ±0.5%
• Inrush Current (Cold Start): 35 A @ 230 V AC
• Leakage Current: < 0.75 mA @ 277 V AC
• Operating Temperature Range: −55 °C to +65 °C (refer to derating curve)
• Operating Humidity: 20% – 95% RH non-condensing
• Protection Functions: Short Circuit & Overload (105–125% constant current limiting, auto-recovery), Over Voltage (27–33 V, shut down and re-power on to recover), Over Temperature (shut down and re-power on to recover)
• Ingress Protection (IP Rating): IP65 (dust-tight and protected against water jets)
• Vibration Resistance: 10G (20–500 Hz)
• Operating Altitude: Up to 5000 meters
• Dimensions (L x W x H): 262 mm x 125 mm x 43.8 mm
• Weight: 2.8 kg
• Safety & EMC Standards: UL62368-1, IEC62368-1, BS EN/EN55032 Class B, BS EN/EN61000-3-2/-3, BS EN/EN61000-4-2/3/4/5/6/8/11, BS EN/EN55035 (6kV surge immunity)
• MTBF: 1,036,800 hours min. (Telcordia SR-332)
• Warranty: 6 years

Information about the HEP-480-24A

The MEAN WELL HEP-480-24A is a high-performance 480W industrial AC/DC power supply engineered for extraordinary reliability in harsh, demanding operational environments. Constructed with a rugged aluminum casing and fully potted in heat-conductive silicone, this power supply achieves an IP65 ingress protection rating and easily handles extreme dust, humidity, oil exposure, vibration up to 10G, and high-altitude deployments up to 5,000 meters. The "A-Type" standard model provides internal potentiometers that allow flexible adjustment of both the output voltage (20.4 – 25.2V) and current limit levels (10 – 20A).

Designed with state-of-the-art active PFC and high-efficiency circuitry operating up to 94.5%, the HEP-480-24A uses fanless convection cooling to operate reliably across a wide ambient temperature range from −55 °C to +65 °C. It incorporates comprehensive protection against short circuits, overloads (via constant current limiting), over-voltage, and over-temperature. Well-suited for critical applications including outdoor telecommunications, electronic billboards, petroleum processing plants, and mining operations, the unit comes with a 6-year manufacturer warranty.