2SK209 Part Audit
Worked for 3 mins 12 sec
Audit status: Completed
Official datasheet cross-check
No geometry was changed.
Current part metadata
- Project/part:
2SK209-BL_TE85L,F_ - Manufacturer: Toshiba
- MPN:
2SK209-BL(TE85L,F) - Description: “Transistor: N-JFET; unipolar; 14mA; 150mW; SC59; Igt:10mA”
- Part Type:
Transistors - Designator prefix:
Q - Datasheet URL: Populated, but points to a Digi-Key product page rather than a PDF:
https://www.digikey.co.uk/product-detail/en/toshiba-semiconductor-and-storage/2SK209-BL-TE85LF/2SK209-BL-TE85LF-CT-ND/4304254 - Mount/package expected: Surface-mount, S-Mini / SOT-346 / SC-59 / TO-236MOD
- Pins/pads: 3
Because Datasheet URL was already nonempty, it was not overwritten. The preferred official Toshiba PDF identified during the audit is:
https://toshiba.semicon-storage.com/info/2SK209_datasheet_en_20140301.pdf?did=19662&prodName=2SK209- Device: Silicon N-channel junction FET for low-noise audio amplification
- Status: Not Recommended for New Design
- BL IDSS rank: 6.0–14 mA at VDS = 10 V, VGS = 0
- VGDS: −50 V
- Gate current: 10 mA
- Power dissipation: 150 mW
- Junction temperature: 125°C
- VGS(OFF): −0.2 to −1.5 V
- Forward transfer admittance: 15 mS typical
- Noise figure: 1 dB typical at 1 kHz
- Package envelope: approximately 2.9 × 2.5 × 1.1 mm
- Packing: TE85L embossed tape, typically 3000 pieces/reel
- Exact assignment: 1 Source, 2 Drain, 3 Gate
The current Toshiba product page identifies SOT-346 / SC-59 / TO-236MOD and Toshiba package
Symbol audit
2-3F1S. The package block in the served datasheet also contains legacy naming S-MINI, TO-236, and 2-3F1B; this is a source-level naming/revision ambiguity rather than proof of a different lead pattern.The symbol has three terminals and its terminal UIDs map to footprint pads 1–3. However:
Table
| Pin | Required function | Current name | Current type | Description |
|---|---|---|---|---|
| 1 | Source | blank/~ | Unspecified | Missing |
| 2 | Drain | blank/~ | Unspecified | Missing |
| 3 | Gate | blank/~ | Unspecified | Missing |
The rendered symbol is also not a recognizable JFET schematic symbol; it appears as a generic/custom graphic with no readable pin labels.
Footprint audit
Embedded footprint identity is
SSM3J375FLXHF.kicad_mod, not 2SK209. Its metadata says 2-3F1S, and it provides:- Pad 1: rectangular SMD, 0.80 × 1.00 mm, at approximately −0.95, +1.20 mm
- Pad 2: rectangular SMD, 0.80 × 1.00 mm, at approximately +0.95, +1.20 mm
- Pad 3: rectangular SMD, 0.80 × 1.00 mm, at approximately 0, −1.20 mm
- Body fabrication outline: approximately 2.9 × 1.5 mm
- Courtyard: approximately 4.9 × 5.4 mm
The geometry is broadly consistent with the three-lead S-Mini/SC-59 family, but the footprint’s source identity is for a different Toshiba transistor. The provided Toshiba datasheet does not include a recommended land pattern, so exact pad-geometry compliance cannot be conclusively established from that document alone.
Mismatches and ambiguities
- Critical: Symbol pin names, descriptions, and electrical types are entirely missing.
- Critical: Although numeric terminal-to-pad mapping is intact, users cannot identify Source/Drain/Gate from the symbol.
- Major: Symbol graphic is not a clear N-channel JFET symbol.
- Major: Footprint asset is named for
SSM3J375FLXHF, a different device; package-family compatibility appears plausible but provenance is incorrect. - Moderate: Existing Datasheet URL is a distributor page, not the preferred official Toshiba PDF.
- Moderate: Part Type
Transistorsis generic; a more precise classification would be N-channel JFET. - Ambiguity: Toshiba sources use both
2-3F1Band2-3F1S, and TO-236 versus TO-236MOD, apparently reflecting legacy/current package naming. - Automated part-review checks returned no findings, despite the missing terminal metadata; manual inspection therefore provides the relevant evidence.
Thought for 11 sec
Audit completed against Toshiba’s official 2SK209 datasheet. Key ratings: N-channel JFET, BL rank IDSS 6–14 mA, VGDS −50 V, VGS(off) −0.2 to −1.5 V, 150 mW, SC-59/SOT-346; correct pinout is 1 Source, 2 Drain, 3 Gate.
- Existing Datasheet property was not changed because it was already populated, though it links to Digi-Key rather than the official Toshiba PDF.
- Critical mismatches: symbol pins lack names, descriptions, and electrical types; the graphic is not a recognizable JFET symbol.
- Footprint geometry appears broadly package-compatible, but its asset is named for a different device (
SSM3J375FLXHF), so exact provenance is questionable. - I filed an internal part-quality report covering these issues.
Fix metadata and review
Update datasheet URL
Fix pin metadata
Improve JFET symbol
Check footprint dimensions
