Power Supply Unit Inter-Tech ASPOWER R1A-KH0400 400 W

The Inter-Tech ASPOWER R1A-KH0400 is a 400 W server power supply unit designed for redundant 1U server installations. It provides stable DC output with 80 PLUS Silver efficiency and features a compact 122 x 245 x 41 mm metal housing, a 20+4 pin ATX motherboard connector and active cooling via a 40 mm fan. The unit supports an AC input range of 100–240 V at 50–60 Hz and comes with motherboard and SATA power cables of varying lengths for flexible internal routing.

Advantages

The power supply delivers up to 400 W total power with an efficiency of approximately 89%, reducing energy losses and heat generation. Its 80 PLUS Silver certification ensures reliable energy performance in server environments. The compact 1U form factor and included cables (40 cm motherboard cable and SATA cables of 400 mm and 550 mm) simplify installation in densely packed racks. Active cooling from the 40 mm fan helps maintain stable operation under load.

Suitable for (tasks / use cases)

• 1U rack-mounted servers and compact server chassis
• Redundant power supply configurations in small to medium server systems
• Systems requiring an 80 PLUS Silver certified PSU for improved efficiency
• Environments with limited internal space where a low-profile PSU is needed

Key specifications

• Total power: 400 W
• Efficiency: 89% (80 PLUS Silver)
• Motherboard connector: 20+4 pin ATX
• Fan diameter: 40 mm
• AC input: 100–240 V, 50–60 Hz
• Dimensions (W x D x H): 122 x 245 x 41 mm
• Weight: 1.9 kg
• Product colour: Silver

How to use

Install the Inter-Tech ASPOWER R1A-KH0400 into the designated 1U server bay following the chassis manufacturer’s instructions. Connect the 20+4 pin ATX cable to the motherboard power socket and attach required SATA or peripheral connectors to drives or other components. Ensure the AC mains cable is connected to a compatible power source within the 100–240 V, 50–60 Hz range. Verify proper airflow around the 40 mm fan and confirm that rack-mounted ventilation meets server cooling requirements.

Recommendations

For reliable long-term operation, use in systems with appropriate ventilation and maintain regular maintenance: keep airflow paths clear, avoid dust buildup around the 40 mm fan, and operate within the specified input voltage range. For redundant setups, match PSU models and ratings to ensure balanced load sharing.