The Seasonic SSP-300TBS is a 300W TFX power supply for compact desktop PCs, workstations and industrial systems. It suits builders who need a reliable power source in a case designed for the smaller TFX form factor.

Its 80 PLUS Bronze certification and Active Power Factor Correction support efficient power delivery. The dual +12V rails provide a combined output of 252W, while low-noise fan control allows fanless operation at loads up to 30%. The fixed cable set provides common motherboard, CPU, SATA and peripheral connections, and protection features help guard against short circuits, over voltage and over power.

Key features

• 300W continuous output for compatible compact systems
• TFX12V v2.31 form factor for cases that cannot take a standard ATX supply
• 80 PLUS Bronze efficiency certification
• Active Power Factor Correction
• Dual +12V rails with 252W combined output
• Fanless operation at loads up to 30% for quieter low-load use
• Short circuit, over voltage and over power protection

Compatibility

Check that your case accepts a TFX power supply and that 300W is sufficient for your components. Connections include a 20+4-pin ATX motherboard connector, a 4+4-pin CPU connector, three SATA power connectors, one 4-pin Molex peripheral connector and one floppy power connector. Its dimensions are 140 mm × 85 mm × 65 mm. Good to know: the power supply is non-modular, so its cables are fixed and cannot be detached.

In the box

• Seasonic SSP-300TBS

Specifications

For compact systems that need TFX sizing and straightforward fixed cabling, the SSP-300TBS combines useful protections, Bronze efficiency and quiet low-load operation in a 300W unit.