The largest PSU3800 battery-charging power supply, the 6EP3437-8UB00-0AY0 delivers up to 40A at 24V DC with a battery-optimized U-I characteristic and field-selectable current range for large 24V battery-backed systems.

Scalable Charging for Large Battery Banks

A DIP switch selects between 30A and 40A output ranges, allowing the same part number to serve different battery capacities without hardware changes. The U-I characteristic provides constant-current bulk charging until the battery bank reaches float voltage, then transitions to constant-voltage maintenance charging — the correct profile for maximizing lead-acid battery service life.

Dual-Mode Operation

Another DIP switch toggles between battery-charging mode and standard constant-voltage mode, enabling the unit to serve as either a dedicated battery charger or a general-purpose 24V DC supply. In constant-voltage mode, two units can operate in parallel for increased current capacity.

Thermal Management for Continuous Duty

94% efficiency minimizes heat dissipation even at full 960W output. If internal temperature rises, the unit steps down output current gradually — 2A every 30 seconds — rather than shutting down abruptly, maintaining power to critical loads while protecting itself from thermal damage.