[ POWER CONVERSION // IDENTIFIED MODEL ]
Seasonic SS-300TFX
Seasonic SS-300TFX 300 W TFX PSU. This entry covers the specific model or bounded historical system assembly identified here; suffixes and supplier revisions are not presumed equivalent.
HIGH-VOLTAGE SAFETY: Disconnect mains before external inspection. Never open a PSU. Internal capacitors can retain dangerous charge after disconnection. Do not probe or repair its interior; use qualified service or replace it.
Model-specific ratings & fit
| Manufacturer identity | Seasonic SS-300TFX 300 W TFX PSU |
|---|---|
| Form factor / generation | TFX12V, 300 W |
| AC input | 100–240 V AC, 50–60 Hz; exact revision line-current printed on label. |
| DC output | 300 W class, +12 V/+5 V/+3.3 V rails; do not infer rail currents from total watts—use SS-300TFX nameplate/datasheet revision. |
| Dimensions / mounting | TFX12V approx. 175 × 85 × 65 mm; match actual drawing and screw locations. |
| Connectors | Fixed motherboard/CPU and storage connectors; harness count differs by variant/revision. |
| Revision distinctions | SS-300TFX is a model family with sub-revisions; bronze/gold ratings and connectors vary. This entry is limited to label-verified SS-300TFX, not every suffix. |
Compatibility & safe handling
- Verify full model, suffix, region and revision using the actual unit nameplate and matching manufacturer manual. Wattage and plug shape alone do not establish compatibility.
- Check AC input range, rail and combined output limits, derating, signaling/pinout, cooling direction, mounting and system qualification before installation.
- PSU modular-side cables are model-specific. Never reuse an unapproved lead; a matching plug can carry a different pinout.
- Server hot-plug is permitted only in qualified host configurations and under the host’s documented redundancy/live-service procedure.
- Never open or internally probe the supply. Retire damaged, wet, burnt, corroded, modified or unidentified units.
Revision & archival notes
SS-300TFX is a model family with sub-revisions; bronze/gold ratings and connectors vary. This entry is limited to label-verified SS-300TFX, not every suffix.
Retain actual suffix, label table and datasheet. TFX mounting rails are not SFX/Flex ATX; verify system-specific fan and airflow orientation.
Photograph the full nameplate, model/FRU, supplier, revision/date code, line selector, cable ends, mounting orientation and source-document issue. Keep observed label data separate from test results.
Manufacturer or primary references
- Seasonic SS-300TFX — manufacturer/product or primary technical referenceSeasonic SS-300TFX 300 W TFX PSU. Check the exact revision, region and system support information.
- Intel ATX / ATX12V Power Supply Design GuideReference for desktop ATX context only. Proprietary historical and hot-swap server outputs are not made interchangeable by ATX standards.
The specific PSU nameplate and corresponding model/service documentation remain controlling.