The DBUF20-24 is a capacitor-based buffer module for 24V DC power supplies manufactured by MEAN WELL. It provides short-term backup power without the need for batteries.

The unit stores energy in maintenance-free electrolytic capacitors and automatically supports the load when the input voltage drops.

🔋 Operating Principle

• Nominal voltage: 24V DC

• Automatically switches to buffering mode when the input voltage falls below the threshold

• Backup threshold selectable by switch:

  • Fixed mode: 22VDC (factory default)

  • Dynamic mode: Vin – 1VDC

⚡ Key Specifications

• Nominal voltage: 24V DC

• Maximum output current: 20A

• Buffering time: up to 350 ms (at 22V / 20A)

• Operating voltage range: 23–30VDC

• Standby consumption: ≤100mA

• Cooling: free air convection

• Mounting: DIN rail TS35

🛡 Protection Features

• Short Circuit Protection

• Overload Protection

• Overvoltage Protection

• Reverse Polarity Protection