Example 1: quick document cross-check
Open the page next to a drawing, datasheet or marking when you need to confirm what a specific symbol, contact, protection code or table entry means before reading the full source document.
SpecCalc Hub
SATA/Molex Pinout Reference
PC power connector reference.
Preliminary estimate only. Not a code-compliance document, not installation approval, not final engineering design. Verify with qualified professional and local codes.
Reference data
SATA data (7)
Device plug mating face, signal segment only: S1 left beside the key, S7 right. L-key turns down on the left, following SATA revision 2.5 figures 27/29. Cable receptacle rear views are mirrored. A/B are differential pair names, not a universal TX/RX direction.
Enlarged diagram
Selected contact: —
| Contact | Signal | Function |
|---|---|---|
| GND | Return / ground | |
| A+ | Data signal | |
| A− | Data signal | |
| GND | Return / ground | |
| B− | Data signal | |
| B+ | Data signal | |
| GND | Return / ground |
SATA power (15)
Device plug mating face: P15 left, P1 right beside the downward L-key (SATA 2.5 figures 27/29). P3 is 3.3 V/pre-charge in this revision; newer PWDIS-capable devices differ. P11 is activity/staggered-spin-up, not an unconditional ground. Verify the exact device specification.
Enlarged diagram
Selected contact: —
| Contact | Signal | Function |
|---|---|---|
| +3.3 V | Power | |
| +3.3 V | Power | |
| +3.3 V* | Power | |
| GND | Return / ground | |
| GND | Return / ground | |
| GND | Return / ground | |
| +5 V | Power | |
| +5 V | Power | |
| +5 V | Power | |
| GND | Return / ground | |
| DAS/DSS* | Control / sideband | |
| GND | Return / ground | |
| +12 V | Power | |
| +12 V | Power | |
| +12 V | Power |
Peripheral power (4)
Cable plug with socket contacts, mating face; upper chamfers. TE drawing front view rotated 90° clockwise: 1 left, 4 right. Not a modular PSU port or floppy connector.
Enlarged diagram
Selected contact: —
| Contact | Signal | Function |
|---|---|---|
| +12 V | Power | |
| COM | Return / ground | |
| COM | Return / ground | |
| +5 V | Power |
Functional reference only. SATA revisions and drive models can assign special control functions to P3 and P11. Modular PSU-side pinouts are NOT standardized by this table; never interchange PSU cables by connector appearance.
What this page helps with
Distinguish the power rails of SATA and common four-contact peripheral connectors while checking a drive manual.
SATA/Molex Pinout Reference is a public SpecCalc Hub reference page for pinouts, component markings and low-power electronics context. PC power connector reference.
The page is meant for transparent early-stage comparison: you can see the working inputs, the result context and the limitations without relying on a black-box answer. Professional verification is required before real-world use.
Formula or method
The page is structured as a practical reference: start with the visible table, diagram and labels, then compare them with the exact connector, device, enclosure or symbol set in front of you.
Use the listed sources to confirm revision, naming and application context. Similar labels can hide different electrical limits, pin functions or test conditions, so the page should be treated as a guided reference rather than a universal standard text.
How to use
- Identify the exact symbol, connector, protection code or table entry you want to verify.
- Match the visible diagram and table with the label on the product, datasheet or drawing instead of assuming a familiar shape means the same thing.
- Check the current manufacturer document and local rules if the reference affects procurement, wiring or installation work.
Practical examples
Example 2: procurement or connection check
A familiar label can still hide a different revision or function. Use the page as a fast filter, then verify the exact document revision before you buy, connect or specify the real part.
Common mistakes
- Using the page without checking units, document revision or the real operating context.
- Treating a preliminary result or reference table as a final engineering decision.
- Ignoring the source links, limitations and related tools needed for the next validation step.
Limitations
- P3 and P11 can have revision/device-specific control meanings. PSU-side modular cables are not interchangeable just because they fit; the table does not authorize improvised adapters.
- The page does not replace official manufacturer documentation, local rules or site measurements.
- Separate professional verification is required for safety, protection, cable or installation decisions.
FAQ
What does the SATA/Molex Pinout Reference page help with first?
It gives a transparent first pass for pc power connector reference. and shows which inputs, assumptions or references should be checked before you move into a real decision.
Can I treat the result as a final decision?
No. This is a preliminary estimate or reference aid, not a final design, code-compliance check or installation approval.
What should I verify next?
Check the cited sources (Delkin Devices — SATA power and revision-dependent P3 function), the related tools and the real equipment or site data that will govern the final decision.
Related tools
Explanation updated: 2026-09-15
This calculator provides an estimate for informational purposes only. It is not a certified engineering design, electrical safety approval, or professional installation recommendation. Always verify final decisions with a qualified professional and applicable local codes.