Zero Ohm Resistor Current Rating: Only 34 of Walsin’s 108 Jumper Rows Resolve to One

A zero ohm resistor current rating does not exist in Walsin’s parametric export. We opened all seven named jumper export files — 108 rows — and matched each against the two chip resistor datasheets Venatech holds. Only 34 resolve to a documented current figure; 74 carry a resistance of 0 Ω and nothing that states the current they can take.

Venatech Limited, an authorised Walsin distributor in Hong Kong, holds all 137 of Walsin Technology (Walsin)’s chip resistor export files and both of the chip resistor datasheets on file, Walsin_MR_Automotive_Thick_Film_Chip_Resistor.pdf and Walsin_WR_General_Purpose_Chip_Resistor.pdf. This post is measured from the seven export files whose name contains “jumper” — HighPower__jumper__ONE_FIFTH_W.xlsx, High_Precision_Thick_Film_chip_resistor_Jumper.xlsx, Thick_Film_Anti_Surge_Chip_Resistor_Jumper.xlsx, Thick_Film_General_Purpose_Jumper.xlsx, Thick_Film_High_Power_Chip_Resistor_Jumper.xlsx, Thick_Film_High_Power_Chip_Resistor_Jumper_1_5W.xlsx and Thick_Film_High_Voltage_Chip_Resistor_Jumper.xlsx — plus both resistor datasheets, and every part number below is real.

How many rows do Walsin’s seven named jumper export files actually return?

108, across only three of the seven files. We opened all seven and counted every row: Thick_Film_General_Purpose_Jumper.xlsx returns 74, Thick_Film_High_Power_Chip_Resistor_Jumper.xlsx returns 33, and HighPower__jumper__ONE_FIFTH_W.xlsx returns 1. The other four — High Precision, Anti-Surge, High Power 1.5 W and High Voltage — return nothing. This matches a finding already on record and we reuse it here rather than re-claim it: four of the seven named jumper files are empty.

What does the Resistance column say on all 108 jumper rows, and why is that not the answer?

0Ω on every one of the 108 rows, with Tolerance reading the literal text Jumper rather than a percentage. We checked all 108 rows across the three populated files and found no exception. Reading 0Ω as “no current limit” is the error a naive BOM check makes: a real jumper carries a maximum resistance of 50 mΩ or 30 mΩ, and the current it can take depends on that residual resistance and the case size, neither of which the export states as a current.

How many of the 108 jumper rows resolve to a published current rating at all?

34, and every one of them is an MR or WR row at a case size the matching datasheet actually tabulates. We matched all 108 rows against both resistor datasheets by prefix and case size. The MR datasheet tabulates jumper current at MR04, MR06, MR08, MR10 and MR12; 14 of the file’s 18 MR rows sit at those five sizes. The WR datasheet tabulates it at WR04, WR06, WR08 and WR12; 20 of the file’s 47 WR rows sit at those four sizes. Every SR row (9) and every WF or MF row (34) falls outside both datasheets’ coverage, because neither PDF carries the SR, WF or MF prefix. We have not seen this 34-of-108 figure counted anywhere else.

What does the WR general purpose jumper current table actually say?

Rated current of 2 A at WR12, 1.5 A at WR08, 1 A at WR06 and 1 A at WR04, with peak current roughly 2.3 to 2.5 times higher at each size. We opened page 9 of Walsin_WR_General_Purpose_Chip_Resistor.pdf, headed “TEST CONDITION FOR JUMPER (0Ω)”, and read the table directly rather than inferring it from the rated-power figure the export carries. This table has not been quoted in Venatech’s published content before; the companion post on the 000 jumper code pulled the MR table only.

Source: Walsin_WR_General_Purpose_Chip_Resistor.pdf, page 9.

Does the WR jumper current table agree with the MR automotive one?

Yes, exactly, at every shared case size. We lined up both tables side by side, WR’s single jumper rating against MR’s P-tolerance jumper rating, and the two match to the ampere at WR12/MR12, WR08/MR08, WR06/MR06 and WR04/MR04. Neither datasheet says this match is intentional — it is the first time the two have been placed next to each other.

That agreement does not extend to the MR F-tolerance jumper, which runs up to a third higher — 2.9 A at MR08 against 1.5 A on both the WR and MR P-tolerance rows at the same case size. WR publishes only one jumper tolerance; MR publishes two, and only the looser of the two matches WR.

Which jumper rows have no current figure anywhere Venatech holds?

74 of the 108: all 9 SR rows, all 34 WF/MF rows, 4 MR rows at sizes outside the MR datasheet (0201, 1218, 2010, 2512) and 27 WR rows at sizes outside the WR datasheet (0201, 1210, 1218, 2010, 2512, 01005). We checked each row’s case size against both datasheets’ own quick-reference tables rather than assuming coverage from the prefix alone.

Four of six same-case-size candidates fail the one requirement that actually matters for a jumper. We will not tell you the other four are interchangeable with the two we can document; we are telling you which two we can back with a PDF today.

What should you do with a jumper position that has no documented current?

Ask us for it by prefix and case size before you commit a footprint, because for 74 of 108 named-export jumper rows the gap sits in our documentation, not necessarily in Walsin’s own files. The trade press has reported passive component lead times stretching through 2026 as AI server and EV production draw on the same capacity, which is exactly the moment a second source needs confirming rather than assuming.

1. State the prefix, not just the case size. MR, WR, SR, WF and MF all make a 0 Ω part in the same footprint, and only two of those five prefixes have a current table in Venatech’s hands today.
2. Cross your BOM in one pass on the free cross-reference tool. It decodes 18 manufacturers’ part numbers and matches against 800,000+ crossable Walsin part numbers, returning every field we hold.
3. Check ready stock before committing to a production slot — a dated snapshot as at 23 September 2026, not a live feed.
4. Ask us for the SR, WF or MF datasheet. We hold two resistor PDFs today, MR and WR, and neither covers those three prefixes; your request is what puts it on the list to Walsin.

Check us while you are here: Venatech Limited, an authorised Walsin distributor in Hong Kong, confirmable with Walsin directly, holding 28 Walsin Technology (Walsin) datasheets, 451 pages, sent on request.

The short version

A zero ohm resistor current rating is never in Walsin’s export — it is in a datasheet, and Venatech holds exactly two. Of the 108 rows across the seven named jumper export files, only 34 sit at a case size either the MR or WR datasheet tabulates for current; the other 74, including every SR, WF and MF row, have no current figure we can show. Where MR and WR do overlap, the WR jumper current table matches the MR P-tolerance table exactly at all four shared sizes — a cross-check we have not seen made before.

Send us the jumper positions off your BOM with the prefix and case size for each, and we will tell you — honestly — which ones we can back with a current rating today and which ones are still a request to Walsin.

For how the 000 jumper code and its resistance ceiling work, see Chip resistor jumpers and 0 Ω parts. For the high-power jumper line specifically, see Zero ohm jumper chip resistor, high power line. The full range is on the Walsin chip resistor range page.

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