Stocked WR Chip Resistors in Hong Kong: 15 of 30 Size and Tolerance Cells Hold a Line, and They Cover 75.1 Percent of the Catalogue

Stocked WR chip resistors in Hong Kong sit in 15 of the 30 case-size and tolerance cells that Walsin’s export defines. We joined the 23 September 2026 snapshot to all 45,315 WR part numbers: the 15 occupied cells hold 34,030 of them, 75.1 percent, and the 15 empty cells hold 11,285.

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Venatech Limited, an authorised Walsin distributor in Hong Kong, publishes a ready-stock snapshot of 1,125 part numbers, dated 23 September 2026. This post is written from the 237 of them that start with WR, joined to the chip resistor exports from Walsin Technology (Walsin). Every part number below is real and sits in both files. The question is the one a buyer asks before sending a BOM: for a WR resistor at this size and this tolerance, is there a line on the shelf at all?

Which case-size and tolerance cells of the WR range does the Hong Kong shelf cover?

Fifteen of thirty. We parsed every WR row in the chip resistor export folder, removed embedded spaces from the part numbers, and grouped the 45,315 distinct codes by the Size and Tolerance columns. That gives 10 case sizes and 3 tolerance values, plus 1 and 5 percent and the word Jumper, which makes 30 cells. 236 of the 237 stocked WR codes join to a row, and they fall in 15 cells. The one that does not join is WR12X0000FTL.

Case size	Tolerance cell	WR rows in export	Stocked lines	A stocked part	Match / mismatch against a request for that cell
0201	plus or minus 1%	11,186	4	WR02X1002FAL	Match — held, though 4 against 11,186
0402	plus or minus 1%	3,995	53	WR04W1504FTL	Match — held
0402	plus or minus 5%	845	24	WR04X101JTL	Match — held
0603	plus or minus 1%	3,995	78	WR06W2R70FTL	Match — held
0603	plus or minus 5%	845	21	WR06X100JTL	Match — held
0805	plus or minus 1%	3,995	19	WR08W2R70FTL	Match — held
0805	plus or minus 5%	845	6	WR08X182JTL	Match — held
1206	plus or minus 1%	4,225	15	WR12W2R20FTL	Match — held
1206	plus or minus 5%	895	10	WR12X101JTL	Match — held
2512	plus or minus 1%	2,627	1	WR25X3301FTL	Match — held, a single line
2512	plus or minus 5%	557	1	WR25X330JTL	Match — held, a single line
0402, 0603, 0805, 1206	Jumper	20 (5 each)	4 (1 each)	WR04X000PTL	Match — held, one jumper per size
01005, 1210, 1218, 2010	all three	8,902	0	none	Mismatch — 12 cells, no stocked line
0201 and 2512	0201 at 5% and Jumper, 2512 Jumper	2,383	0	none	Mismatch — 3 cells, no stocked line

Fifteen cells carry a line and fifteen do not. We have not seen this counted anywhere: half the cells, three quarters of the rows. The occupied cells are the ones where Walsin publishes the most WR parts, because the stocked sizes are the common ones.

How dense is the shelf inside each occupied cell?

Very unevenly. We divided stocked lines by export rows in each cell and scaled to a thousand. The densest cell is 0402 at plus or minus 5 percent, 24 stocked lines against 845 rows, 28.40 per thousand. The thinnest occupied cell is 0201 at plus or minus 1 percent, 4 against 11,186, 0.36 per thousand. That is a 79-fold spread inside one resistor family.

Case size	1% lines per thousand rows	5% lines per thousand rows	Rated power on both	Match / mismatch — which tolerance is denser
0201	0.36	0.00	1/20 W	Mismatch — 1% only, no 5% line
0402	13.27	28.40	1/16 W	5% is denser
0603	19.52	24.85	1/10 W	5% is denser
0805	4.76	7.10	1/8 W	5% is denser
1206	3.55	11.17	1/4 W	5% is denser
2512	0.38	1.80	1 W	5% is denser

Within each stocked size the export gives one rated power to both tolerances, taken from the Rated Power column of the same rows. We read that column rather than infer it from the case size. For how power rating tracks case size in the wider catalogue, see chip resistor power rating by case size.

Does the shelf lean to 1 percent or to 5 percent?

To 1 percent in volume and to 5 percent in proportion. We counted the stocked codes by the tolerance their export row states. There are 170 at plus or minus 1 percent, 62 at plus or minus 5 percent and 4 jumpers, which makes 236. Plus or minus 5 percent is 17.4 percent of the 45,315 WR rows but 26.3 percent of the 236 stocked lines.

The shelf over-weights the looser tolerance relative to the catalogue. The 1 percent value is 82.5 percent of WR rows and 72.0 percent of the shelf. In five of the six stocked sizes the 5 percent cell is denser than the 1 percent cell, as the table above shows; 0201 is the exception because it holds no 5 percent line. Jumpers are the extreme case: 4 of 47 WR jumper rows are held, 8.5 percent, one 000P code in each of 0402, 0603, 0805 and 1206. Those are WR04X000PTL, WR06X000PTL, WR08X000PTL and WR12X000PTL. The tolerance letter in each code (F, J, P) is explained in tolerance, TCR and dielectric codes decoded.

Which 15 cells hold no stocked line?

All three tolerance cells of four sizes, plus three single cells. The 12 cells in 01005, 1210, 1218 and 2010 hold 8,902 WR rows between them, and 0201 at 5 percent, 0201 Jumper and 2512 Jumper add 2,383 more, which makes 11,285.

Case size	Cells with no stocked line	WR rows in those cells	Match / mismatch against a request for that size
01005	1%, 5%, Jumper	755	Mismatch — whole size empty
1210	1%, 5%, Jumper	3,022	Mismatch — whole size empty
1218	1%, 5%, Jumper	1,938	Mismatch — whole size empty
2010	1%, 5%, Jumper	3,187	Mismatch — whole size empty
0201	5%, Jumper	2,380	Mismatch — only the 1% cell is held
2512	Jumper	3	Mismatch — 1% and 5% held, one line each

An empty cell is a statement about one dated snapshot, not about the part. Every WR row in those cells is still in Walsin’s published export, which is why the free cross-reference tool can still return it. What the snapshot cannot tell you is whether a line exists in Hong Kong today; the ready-stock page takes up to 500 part numbers or an Excel or CSV file and states the result for the snapshot date.

What happens to a BOM line that falls in an empty cell?

It is a quotation question, not a stock answer. We opened the 237 stocked WR codes and the export side by side. One code, WR12X0000FTL, has no export row: it carries a four-zero resistance field, and the jumper codes that do join use three zeros and the letter P. Treat a code like that as unresolved until Walsin confirms it.

Three habits follow from the grid, each measured above:

1. Check the cell before the value. A 2010 or 1210 WR line has no shelf behind it on this snapshot, whatever the resistance.
2. Check 5 percent before assuming it is the minority. It is 26.3 percent of the shelf against 17.4 percent of the catalogue.
3. Do not read a stocked jumper as a power resistor. The four held are rated at the size’s own 1/16, 1/10, 1/8 and 1/4 watt.

We hold 28 Walsin datasheets, 451 pages, and the WR general purpose sheet is among them, at revision ASC_WR_V24 dated September 2016, so qualify against it and against your own circuit. Confirm the part against both datasheets, yours and Walsin’s. The wider resistor range sits on the chip resistor page.

The short version

Hong Kong holds a WR chip resistor in 15 of the 30 case-size and tolerance cells. Those 15 hold 34,030 of 45,315 WR part numbers, 75.1 percent; the other 15 hold 11,285. The shelf is 170 lines at 1 percent, 62 at 5 percent and 4 jumpers. 0402 at 5 percent is the densest cell at 28.40 lines per thousand rows; 0201 at 1 percent is the thinnest at 0.36. 01005, 1210, 1218 and 2010 are empty at every tolerance. This is a snapshot dated 23 September 2026, not a live feed. Qualification stays with you.

Send your BOM to the ready-stock checker and read which of your lines land in an empty cell. And a question back: how many of your WR lines are in 1210 or 2010, and did anyone check the shelf before the design froze?

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Frequently asked questions

<!– wp:rank-math/faq-block {"questions":[{"id":"faq-question-01","title":"How many WR chip resistor case-size and tolerance cells does the Hong Kong shelf cover?","content":"15 of 30. The 23 September 2026 snapshot holds WR lines in 0201 at plus or minus 1 percent, in 0402, 0603, 0805 and 1206 at 1 and 5 percent and as jumpers, and in 2512 at 1 and 5 percent. Those cells hold 34,030 of the 45,315 WR part numbers in Walsin's export.","visible":true},{"id":"faq-question-02","title":"Which WR case sizes have no stocked line at all?","content":"Four: 01005, 1210, 1218 and 2010. Together they account for 12 of the 15 empty cells and 8,902 WR rows in the export. Two more sizes are only partly covered: 0201 holds only its plus or minus 1 percent cell and 2512 holds no jumper.","visible":true},{"id":"faq-question-03","title":"Does the Hong Kong shelf hold more 1 percent or 5 percent WR resistors?","content":"More at 1 percent: 170 lines against 62 at 5 percent, plus 4 jumpers. In proportion the shelf leans the other way. Plus or minus 5 percent is 17.4 percent of the 45,315 WR rows and 26.3 percent of the 236 stocked lines that join to the export.","visible":true},{"id":"faq-question-04","title":"Is the stocked WR range the same across 0402, 0603 and 0805?","content":"No. The export holds the same 3,995 and 845 rows at 1 and 5 percent in each of those three sizes, but the shelf holds 53 and 24 in 0402, 78 and 21 in 0603, and 19 and 6 in 0805. Density per thousand rows runs from 4.76 to 28.40.","visible":true},{"id":"faq-question-05","title":"Why does one stocked WR code not join to the export?","content":"Because WR12X0000FTL has a four-zero resistance field and a 1 percent tolerance letter, and Walsin’s chip resistor export holds no row for it. The jumper codes that do join use three zeros and the letter P. It is 1 of 237 stocked WR codes, so 236 join.”,”visible”:true},{“id”:”faq-question-06″,”title”:”Can I rely on this grid for today’s stock?”,”content”:”No. It describes the snapshot dated 23 September 2026, counted in part numbers and never in pieces, and it is not a live feed. Use the ready-stock page to check your own list against the snapshot and ask us to confirm any line before you commit a design to it.”,”visible”:true}],”listStyle”:””,”titleWrapper”:”h3″,”titleCssClasses”:””,”contentCssClasses”:””,”sizeSlug”:””} –>

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