Seasonic SSP-300TBS power supply unit 300 W TFX Stainless steel

Seasonic SSP-300TBS power supply unit 300 W TFX Stainless steel is a compact, TFX-form-factor PSU designed for small-form-factor desktops and server applications. The unit delivers 300 W of continuous power with universal AC input support from 100 to 240 V and an input frequency range of 47–63 Hz. With an 80 PLUS Bronze efficiency rating and a stainless steel enclosure, this Seasonic SSP-300TBS model provides a balance of efficiency, reliability and space-saving design. The PSU uses a non-modular cabling approach and active cooling via an 80 mm fan. CE compliance is indicated for regulatory conformity.

Advantages

The Seasonic SSP-300TBS offers reliable 300 W output in a TFX form that fits compact chassis where standard ATX units do not. The 80 PLUS Bronze certification ensures improved energy efficiency under typical loads, reducing wasted power and heat compared with non-certified units. The stainless steel housing enhances mechanical durability and EMI shielding. Active cooling with an 80 mm fan provides forced airflow for stable operation under sustained loads. Non-modular cabling simplifies installation on systems where fixed cable layouts are acceptable.

Suitable for

• Small form factor desktops and compact workstation builds
• Entry-level servers and network appliances requiring a TFX PSU
• Systems prioritizing reliability and efficient power delivery over modular cabling
• Upgrades where space constraints prohibit standard ATX power supplies

Key specifications

• Total power: 300 W
• Form factor: TFX
• AC input voltage: 100 - 240 V
• AC input frequency: 47 - 63 Hz
• 80 PLUS certification: 80 PLUS Bronze
• Cabling type: Non-Modular
• Cooling type: Active
• Fan diameter: 80 mm
• Product colour: Stainless steel
• Compliance certificates: CE

How to use

Install the Seasonic SSP-300TBS into a compatible chassis designed for TFX power supplies, securing it with the manufacturer-recommended screws and orientation. Connect the fixed cables to the motherboard, storage devices and any peripherals according to the system layout and the PSU’s connector labels. Ensure the AC mains supply matches the specified input range (100–240 V) and that the system has appropriate ventilation to allow the 80 mm fan to exhaust heat. Power on the system and verify stable operation and expected voltages within your motherboard’s hardware monitoring tools.

Recommendations

Use the Seasonic SSP-300TBS in systems with power draws within the 300 W rating and allow adequate airflow around the PSU to maintain fan effectiveness. For systems with higher peak power demands or where cable management and modularity are critical, consider alternative models that offer greater wattage or modular cabling. Regularly check for dust buildup on the fan and vents and perform periodic inspections to ensure connectors remain secure.