Power Supply Unit LC-Power LC400SI V2.31 400 W

The LC-Power LC400SI V2.31 is a 400 W ATX power supply unit with 80 PLUS Standard certification, designed to provide stable power for desktop PCs. It supports AC input from 180 to 240 V and includes active cooling with a 140 mm fan. The unit comes in black, weighs 1.59 kg and is compliant with CE and TÜV standards.

Advantages

The LC400SI V2.31 delivers a total output of 400 W with 85% efficiency, includes a 20+4 pin ATX motherboard connector and multiple SATA power cable lengths (480 mm, 620 mm and 760 mm). Its 140 mm fan provides effective heat dissipation while keeping operational noise low for typical desktop use. Certification and safety approvals ensure compatibility and reliable operation in standard PC builds.

Suitable for

• Basic office and home desktop PCs
• Entry-level gaming or multimedia systems with modest power demands
• System builds requiring a standard ATX 20+4 pin connector
• Upgrades where 400 W total power is sufficient

Key specifications

• Total power: 400 W
• Efficiency: 85% (80 PLUS Standard)
• Motherboard connector: 20+4 pin ATX
• AC input voltage: 180–240 V
• Fan diameter: 140 mm
• Motherboard cable length: 55 cm
• SATA power cable lengths: 480 mm, 620 mm, 760 mm
• Weight: 1.59 kg
• Colour: Black

How to use

Install the LC-Power LC400SI V2.31 into a compatible ATX chassis following standard PSU mounting procedures. Connect the 20+4 pin ATX connector to the motherboard, attach SATA connectors to drives as needed and ensure the AC mains cable is connected to a proper 180–240 V outlet. Verify all connections before powering on the system. Maintain adequate airflow in the case to assist the 140 mm fan in cooling the unit.

Recommendations

For reliable operation, use this 400 W PSU in systems with modest power requirements and avoid combining it with high-end graphics cards or multiple power-hungry devices. Ensure the case has sufficient ventilation and use surge protection where available.