Part Review Mismatch
Worked for 53 sec
The part already has a Datasheet URL set, so I’m using that for the cross-check rather than replacing it.
Worked for 5 mins
Created a project doc
Completed the part review and created the detailed report here: Part Information Review: SQD40N06-14L_GE3.
Key findings: the existing Datasheet URL is present, and the part metadata broadly matches the Vishay SQD40N06-14L_GE3; however, the schematic pins lack Gate/Drain/Source descriptions and all pin types are unspecified. The main issue is a likely critical footprint mismatch: the large TO-252 tab pad is numbered
3, but the datasheet says the tab is Drain, while pin 3 is Source.Suggested next steps:
- Fix pin descriptions/types for pins 1–3.
- Correct the footprint so the large tab is electrically Drain.
- Optionally replace the stored Datasheet URL with the official Vishay PDF URL for traceability.
Fix pins and footprint
Fix mismatches
Use official datasheet
Run ERC/DRC
Export corrected part
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Part Information Review: SQD40N06-14L_GE3
Date: 2026-07-17
Reviewed project information
- Project:
SQD40N06-14L_GE3 - Manufacturer Part Number:
SQD40N06-14L_GE3 - Manufacturer Name:
Vishay - Project description:
Vishay SQD40N06-14L_GE3 N-channel MOSFET Transistor, 40 A, 60 V, 3-Pin TO-252 - Part Type property:
Transistors - Package or Case Code property:
252-TO - Designator Prefix property:
Q - Pads / terminals in project: 3
- Datasheet URL currently set:
https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/eef341c94439c016919d5f30a79b4967eb1e71e5041865bc5f183a5d7cd1a899.pdf - Official Vishay datasheet located during review:
https://www.vishay.com/docs/67002/sqd40n06-14l.pdf
The project already had a Datasheet URL, so I did not replace it automatically. The current stored PDF appears to contain the Vishay datasheet text for SQD40N06-14L, document number 67002, Rev. C, 10-Aug-15.
Datasheet key facts
Source: Vishay Siliconix SQD40N06-14L datasheet, document number 67002.
Table
| Item | Datasheet value |
|---|---|
| Device type | Automotive N-channel MOSFET |
| Configuration | Single |
| Package | TO-252 / TO-252AA / DPAK |
| Drain-source voltage, VDS | 60 V |
| Gate-source voltage, VGS | +/-20 V |
| Continuous drain current, TC = 25 C | 40 A |
| Continuous drain current, TC = 125 C | 29 A |
| Pulsed drain current, IDM | 160 A |
| RDS(on), VGS = 10 V, ID = 20 A | typ 0.011 ohm, max 0.014 ohm |
| RDS(on), VGS = 4.5 V, ID = 20 A | typ 0.014 ohm, max 0.017 ohm |
| Gate threshold voltage, VGS(th), ID = 250 uA | min 1.5 V, typ 2.0 V, max 2.5 V |
| Power dissipation, TC = 25 C | 75 W |
| Power dissipation, TC = 125 C | 25 W |
| Thermal resistance, junction-to-ambient PCB mount | 60 C/W |
| Thermal resistance, junction-to-case drain | 2 C/W |
Datasheet pinout
The datasheet top-view marking shows a three-terminal TO-252 MOSFET with:
Table
| Pin / feature | Datasheet function |
|---|---|
| Pin 1 | Gate (G) |
| Pin 2 | Drain (D) |
| Pin 3 | Source (S) |
| Tab | Drain connected to tab |
Schematic symbol review
Observed schematic part implementation:
Table
| Terminal UID suffix | Pin Number property | Pin Description | Pin Type | Notes |
|---|---|---|---|---|
98be8eec | 1 | not set | Unspecified | Should be Gate |
efd3176e | 2 | not set | Unspecified | Should be Drain |
4485397b | 3 | not set | Unspecified | Should be Source |
Findings:
- Pin count matches the 3-pin device.
- Pin descriptions are missing; the terminals do not explicitly identify Gate, Drain, and Source.
- Pin Type is
Unspecifiedon all terminals. Recommended electrical typing would be Gate = Input, Drain = Passive/Power, Source = Passive/Power depending on library conventions. - Symbol pin positions roughly form a three-pin transistor-style arrangement, but the individual terminal names/functions are not encoded in the visible pin properties.
Footprint review
Observed footprint asset:
TO-252AA.kicad_mod with SMD pads:Table
| Footprint pad | Position in footprint | Size | Intended by current footprint geometry |
|---|---|---|---|
| Pad 1 | x = -2.286 mm, y = 7.842 mm | 1.397 mm x 2.286 mm | small lead pad |
| Pad 2 | x = +2.286 mm, y = 7.842 mm | 1.397 mm x 2.286 mm | small lead pad |
| Pad 3 | x = 0 mm, y = 1.407 mm | 5.690 mm x 6.180 mm | large tab pad |
Datasheet / DPAK expectation:
- Pin 1 should be Gate.
- Pin 2 should be Drain.
- Pin 3 should be Source.
- The large thermal tab should also be Drain.
Footprint finding:
- The footprint has a large center/tab pad numbered
3. For this MOSFET family, the tab should be Drain, electrically common with pin 2, while pin 3 should be Source. This is a likely footprint pin-numbering mismatch. - If the EDA net mapping treats pad 3 as Source, then the source net would connect to the drain tab copper, causing a serious electrical error.
- The footprint should be revised so the large tab pad is numbered as Drain / pin 2, or otherwise configured as an additional drain-connected pad while retaining Source as the right lead.
- Pad dimensions match the Vishay recommended minimum DPAK pad dimensions in broad terms: 5.690 mm x 6.180 mm large pad, 1.397 mm x 2.286 mm small pads, 2.286 mm pitch.
Mismatch summary
Table
| Area | Status | Finding |
|---|---|---|
| MPN | Pass | SQD40N06-14L_GE3 matches Vishay SQD40N06-14L device family. |
| Manufacturer | Pass | Vishay is correct. |
| Description | Pass | N-channel, 60 V, 40 A, TO-252 description matches datasheet. |
| Pin count | Pass | 3 terminals present. |
| Datasheet URL | Pass / note | A Datasheet URL is already set; official Vishay URL also found. |
| Schematic pin descriptions | Mismatch | Gate/Drain/Source descriptions are missing. |
| Schematic pin types | Mismatch | All pins are Unspecified. |
| Footprint pad geometry | Mostly pass | Pad sizes and pitch align with TO-252/DPAK recommended pad dimensions. |
| Footprint pad numbering | Critical mismatch risk | Large tab pad is numbered 3, but datasheet states drain is connected to tab; source is pin 3. |
Recommended fixes
- Add pin descriptions:
- Pin 1: Gate
- Pin 2: Drain
- Pin 3: Source
- Set pin electrical types according to Flux library convention for MOSFETs.
- Correct the footprint mapping so the large tab pad is electrically Drain, not Source. Prefer numbering the large tab as pad 2 or adding a duplicate drain-connected pad with correct jumper/duplicate-pad handling if the platform supports it.
- Consider changing the Datasheet URL to the official Vishay PDF URL for better traceability:
https://www.vishay.com/docs/67002/sqd40n06-14l.pdf. - Update package property from
252-TOto the more standardTO-252AAorTO-252 / DPAKif allowed by the library property conventions.
Reviewed project information
Datasheet key facts
Datasheet pinout
Schematic symbol review
Footprint review
Mismatch summary
Recommended fixes
