• 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: 21 – 26 V (via internal potentiometer)
• Rated Output Current: 13.34 A
• Current Adjustment Range: 6.67 – 13.34 A (via internal potentiometer)
• Rated Output Power: 320.16 W
• Efficiency (Typ.): 94.5%
• Power Factor (Typ.): PF > 0.98 @ 115 V AC, PF > 0.95 @ 230 V AC, PF > 0.94 @ 277 V AC (at full load)
• Ripple & Noise (Max.): 150 mV p-p
• Voltage Tolerance: ±1.0%
• Line Regulation: ±0.5%
• Load Regulation: ±0.5%
• Inrush Current (Cold Start): 70 A @ 230 V AC
• Leakage Current: < 0.75 mA @ 277 V AC
• Operating Temperature Range: −55 °C to +70 °C (refer to derating curve)
• Operating Humidity: 20% – 95% RH non-condensing
• Protection Functions: Short Circuit, Overload (105–125% hiccup mode, auto-recovery), Over Voltage (27–33 V, shut down and latch off), Over Temperature (shut down and latch off)
• 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): 252 mm x 90 mm x 43.8 mm
• Weight: 1.88 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: 1,565,600 hours min. (Telcordia SR-332)
• Warranty: 6 years

Information about the HEP-320-24A

The MEAN WELL HEP-320-24A is a robust 320W industrial AC/DC power supply engineered specifically to perform under extreme environmental conditions. Housed in a durable aluminum casing and fully potted with heat-conductive silicone, this power supply is rated to IP65 and can withstand up to 10G vibration, high dust density, high humidity, and operating altitudes of up to 5,000 meters. The "A-Type" model features accessible internal potentiometers beneath rubber stoppers on the housing, allowing users to fine-tune both the output voltage (21 – 26V) and constant current output levels (6.67 – 13.34A).

With an exceptional working efficiency of up to 94.5% and built-in active PFC, the HEP-320-24A employs a fanless, free-air convection cooling design capable of operating reliably across a wide temperature span from −55 °C to +70 °C. It includes comprehensive safety mechanisms such as hiccup-mode overload and short-circuit protection, as well as latch-off protections for over-voltage and over-temperature events. Suitable for outdoor telecommunications, electronic signage, petroleum plants, and heavy mining applications, this unit is backed by a 6-year manufacturer warranty.