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Adom Basic Parts

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The Adom Basic Parts catalog — the 138 commodity passives and LEDs Adom stocks on reels for the PnP line (79 resistors, 40 MLCCs, 11 LEDs, 6 inductors, 2 ferrite beads across 0402/0603/0805), plus machine pins, edge contacts, and specialty parts. Every basic part is listed with its MPN and its wiki component page carrying symbol, footprint, 3D model, and KiCad/Fusion downloads.

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Closed bug report

Nonzero Bourns CR0402 wiki resistor page inherits zero-ohm jumper current rating

John Lauer · 10d ago ·closed by Drew Owens

Adom Wiki1.7.69, Linux, component source reviewed2026-10-11. No bridge involved.

The CR0402-FX-1002GLF README listed Rated current 1 A; max overload current 2.5 A for a10kΩ resistor. Bourns CR-series datasheet p1 places these values under the zero-ohm jumper rating. A10kΩ part at62.5mW instead has a nominal2.5mA /25V power bound at70°C, before tolerance/design margin; both working-voltage and power limits apply.

I corrected this existing component README directly against a fresh upstream head, removing the incorrect current row and adding the explicit power-bound explanation. CAD and identity unchanged. Source fix is live; no package release was attempted because this source checkout has no package.json. Please audit the common basic-part generation/template path and other nonzero CR0402 pages so the error does not recur, and carry the fix to their installable docs where applicable.

Primary evidence: https://www.bourns.com/docs/product-datasheets/cr.pdf p1, electrical table, zero-ohm section. Reproduction is the old README row; no visual UI fault is involved. Project evidence is under adom/adom-custom-electronic-load checkpoints/bourns-land-review. No thermal or physical qualification claimed.

1 Reply

Drew Owens · 6d ago

Done across every CR0402 page (Drew asked me to carry it through).

README, 33 pages. Removed the Rated current 1 A; max overload current 2.5 A row and added a note under "Notes for designers", in the same place and wording as your 10 kΩ note, with each value's own limit. Up to 33 kΩ the 62.5 mW rating binds first. From 47 kΩ up, sqrt(P·R) passes the 50 V maximum working voltage (the crossover is 40 kΩ), so those notes give the current at 50 V instead.

Characterization sheet, 9 pages. CR0402-FX-*.html computes Rated Current as sqrt(P/R) with no 50 V cap, so it overstated the current from 47 kΩ up; the worst case was 1 MΩ at 0.25 mA listed against 0.050 mA allowed. I capped those 9 cells and labelled them "(50 V limit)". Values below 40 kΩ were already right.

10 kΩ page. Restored the spaces missing from your note (at70°C, nominal62.5mW, about2.5mA or25V). Nothing else on it changed.

Template. I couldn't find what generated the text. The row isn't in adom/adom-basic-parts, and the only script in the page repos (provenance/tools/build_cr0402.py) builds the 3D model, not the docs. So it was written into each page at generation time. If that generator is ever rerun, it has to drop the jumper row for nonzero values and cap rated current at min(sqrt(P/R), 50 V / R), or both errors come back.

Packages. Nothing to republish: these pages have no installable package, so the source fix is the live fix, same as yours.

Verified. Fetched all 34 live pages after the push: the jumper row is gone everywhere and each note shows its own figures. Screenshot-checked the 10 kΩ and 100 kΩ pages.

Value Page Binding limit Limit
10 Ω CR0402-FX-10R0GLF 62.5 mW power 79.1 mA / 0.791 V
15 Ω CR0402-FX-15R0GLF 62.5 mW power 64.5 mA / 0.968 V
22 Ω CR0402-FX-22R0GLF 62.5 mW power 53.3 mA / 1.17 V
33 Ω CR0402-FX-33R0GLF 62.5 mW power 43.5 mA / 1.44 V
47 Ω CR0402-FX-47R0GLF 62.5 mW power 36.5 mA / 1.71 V
68 Ω CR0402-FX-68R0GLF 62.5 mW power 30.3 mA / 2.06 V
100 Ω CR0402-FX-1000GLF 62.5 mW power 25 mA / 2.5 V
120 Ω CR0402-FX-1200GLF 62.5 mW power 22.8 mA / 2.74 V
150 Ω CR0402-FX-1500GLF 62.5 mW power 20.4 mA / 3.06 V
220 Ω CR0402-FX-2200GLF 62.5 mW power 16.9 mA / 3.71 V
330 Ω CR0402-FX-3300GLF 62.5 mW power 13.8 mA / 4.54 V
470 Ω CR0402-FX-4700GLF 62.5 mW power 11.5 mA / 5.42 V
680 Ω CR0402-FX-6800GLF 62.5 mW power 9.59 mA / 6.52 V
1 kΩ CR0402-FX-1001GLF 62.5 mW power 7.91 mA / 7.91 V
1.5 kΩ CR0402-FX-1501GLF 62.5 mW power 6.45 mA / 9.68 V
2 kΩ CR0402-FX-2001GLF 62.5 mW power 5.59 mA / 11.2 V
2.2 kΩ CR0402-FX-2201GLF 62.5 mW power 5.33 mA / 11.7 V
3.3 kΩ CR0402-FX-3301GLF 62.5 mW power 4.35 mA / 14.4 V
4.7 kΩ CR0402-FX-4701GLF 62.5 mW power 3.65 mA / 17.1 V
5.6 kΩ CR0402-FX-5601GLF 62.5 mW power 3.34 mA / 18.7 V
6.8 kΩ CR0402-FX-6801GLF 62.5 mW power 3.03 mA / 20.6 V
10 kΩ CR0402-FX-1002GLF 62.5 mW power 2.5 mA / 25 V
15 kΩ CR0402-FX-1502GLF 62.5 mW power 2.04 mA / 30.6 V
22 kΩ CR0402-FX-2202GLF 62.5 mW power 1.69 mA / 37.1 V
33 kΩ CR0402-FX-3302GLF 62.5 mW power 1.38 mA / 45.4 V
47 kΩ CR0402-FX-4702GLF 50 V working voltage 1.06 mA at 50 V
68 kΩ CR0402-FX-6802GLF 50 V working voltage 735 µA at 50 V
100 kΩ CR0402-FX-1003GLF 50 V working voltage 500 µA at 50 V
150 kΩ CR0402-FX-1503GLF 50 V working voltage 333 µA at 50 V
220 kΩ CR0402-FX-2203GLF 50 V working voltage 227 µA at 50 V
330 kΩ CR0402-FX-3303GLF 50 V working voltage 152 µA at 50 V
470 kΩ CR0402-FX-4703GLF 50 V working voltage 106 µA at 50 V
680 kΩ CR0402-FX-6803GLF 50 V working voltage 73.5 µA at 50 V
1 MΩ CR0402-FX-1004GLF 50 V working voltage 50 µA at 50 V

Closing. Reopen if the generator turns up.

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