Chip Resistor Array Cross Reference: One Part Number Hides Four Resistors on 9,079 of 10,022 Rows

A chip resistor array cross reference fails silently when the Size column reads like a single discrete. We counted Walsin’s 10,022 array rows: 9,079 (90.6%) report Size as an ordinary case code, with the element count sitting only in the Series text. One part number is four resistors, and the column a filter sorts on does not say so.

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Venatech Limited, an authorised Walsin distributor in Hong Kong, holds all 137 of Walsin Technology (Walsin)’s chip resistor export files. This post is measured from the two of those files whose name says “Array” — Thick_Film_Chip_Resistor_Array__1of1.xlsx (7,250 rows) and Thick_Film_Chip_Resistor_Array_Anti_Sulfuration__1of1.xlsx (2,772 rows) — and every part number below came out of one of them. We hold no datasheet for either array prefix, WA or SA; our two resistor datasheets cover MR and WR only, and we say so before you read a single figure.

How many of Walsin’s 10,022 chip resistor array rows actually tell you the element count?

943 of them, and only because of an asterisk. We opened both array files and checked the Size column against the element count written in the Series text. On 9,079 of 10,022 rows (90.6%), Size reads a plain case code — 0603(1608), 0402(1005) — exactly as a single discrete resistor would. Only three Size strings ever carry the count itself: 0602*8 (555 rows), 0201*4 (194) and 0201*2 (194), all in the main array file. The anti-sulfuration array file never discloses it at all — zero of its 2,772 rows.

Array file	Rows	Rows where Size discloses element count	Rows where Size reads as a plain case code
Thick_Film_Chip_Resistor_Array__1of1.xlsx	7,250	943	6,307
Thick_Film_Chip_Resistor_Array_Anti_Sulfuration__1of1.xlsx	2,772	0	2,772
Both files	10,022	943 (9.4%)	9,079 (90.6%)

A cross-reference tool, or a design engineer, reading Size alone will file nine out of ten Walsin array rows as single discretes. We have not seen this counted anywhere.

Does the same array series ever publish two different Size strings for the same part?

Yes, and it is the same product line split by a single character. Walsin’s eight-element 0602 array ships under one series name — Thick Film Chip Resistor Array 0602*8, Convex type — in two capitalisations, each holding exactly 555 rows. We checked every field on both halves: resistance set, tolerance distribution and rated power are identical. The only difference is the part number’s trailing packaging letter and, downstream of it, the Size column.

Field	WA06W1002FTL	WA06W1002FTLN	Match / mismatch
Series (element count)	0602×8, Convex type	0602×8, Convex Type	Match on element count
Resistance	10,000 Ω	10,000 Ω	Match
Tolerance	±1%	±1%	Match
TCR	≦±200 ppm/°C	≦±200 ppm/°C	Match
Rated power	1/16 W	1/16 W	Match
Packaging suffix	none	N	Mismatch — one character
Size column	0603(1608)	0602*8	Mismatch — one reads as a plain discrete, the other as an array

Same eight-element array, same electrical values, and one packaging letter decides whether the Size column tells you it is an array at all. A cross built on Size alone returns a different verdict for two rows that are the same part in every field that matters electrically.

What happens to a 0603, 10 kΩ cross-reference signature once the array file is added?

It grows, and the growth is the point. Walsin’s own 0603 / 10 kΩ / ±1% / ≦±100 ppm/°C signature was already banked at 10 discrete thick film part numbers across three prefixes and five series — a General Purpose finding we are reusing here, not re-claiming. We added the array file to that exact signature and re-measured it. One array row matches it precisely: WA06X1002FTL, a four-element part whose Size column reads 0603(1608) — identical to the single-element discretes in the same table, with no element count visible anywhere in that field.

Family searched	Part numbers at this exact signature	Running total
General Purpose (banked finding)	10	10
+ Thick Film Anti-Surge	2	12
+ Chip Resistor Array	1 (WA06X1002FTL, four elements)	13

Thirteen part numbers share one electrical signature, and exactly one of them is a four-element array whose Size column reports 0603 with no hint of the other three resistors inside it. Widen the same search to every thick-film family that publishes this signature — adding High Power and High Voltage — and the count reaches 24 part numbers, which we have not seen counted anywhere before.

Part number	Series	Rated power	Size
WR06X1002FTL	General Purpose	1/10W	0603(1608)
MR06X1002FTL	General Purpose (Automotive)	1/8W	0603(1608)
WA06X1002FTL	Chip Resistor Array, 0603×4	1/10W	0603(1608)
MK06S1002FTL	Thick Film Power Surge (Automotive)	1/4W	0603(1608)

(Four of the 24 shown; full set is 24 rows across eight series groups, measured 11 October 2026 against the exports listed above.)

How wide is the resistance and tolerance range across the two array files?

Wide, and not the same shelf in each file. We parsed all 7,250 rows of the main array file: resistance runs 1 Ω to 10 MΩ across 644 distinct values, tolerance is ±1% on 5,457 rows and ±5% on 1,781, with 12 jumper rows reading 0Ω. We parsed all 2,772 rows of the anti-sulfuration array file separately: resistance there tops out at 1 MΩ, a full decade lower, and the floor is 10 Ω rather than 1 Ω.

Field	Thick_Film_Chip_Resistor_Array__1of1.xlsx	Thick_Film_Chip_Resistor_Array_Anti_Sulfuration__1of1.xlsx
Rows	7,250	2,772
Resistance range	1 Ω – 10 MΩ	10 Ω – 1 MΩ
Tolerance	±1% (5,457), ±5% (1,781), Jumper (12)	±1% (2,284), ±5% (484), Jumper (4)
Tightest TCR offered	≦±100 ppm/°C (571 rows, one series only)	≦±200 ppm/°C
Element counts	2, 4, 8	2, 4

The ≦±100 ppm/°C grade sits on exactly one series in the plain array file — 0603*4, Convex type, 571 rows, all ±1% — and on none of the 2,772 anti-sulfuration array rows. A buyer who needs that TCR grade in an array and reaches for the anti-sulfuration line will not find it there at all.

Is a Walsin array’s rated power per element or per package?

We do not know, and we are telling you that rather than guessing. Both array files publish one Rated Power figure per row — 1/32 W, 1/16 W or 1/10 W in the main file — with no column stating whether that figure is per element or for the whole package. Neither of Venatech’s two chip resistor datasheets covers the WA or SA prefix, so there is no approval sheet on our side to settle it.

Does Venatech hold a datasheet for either array family?

No. We hold 28 Walsin datasheets, 451 pages, and none carries the WA or SA prefix. We hold datasheets for MR (automotive general purpose) and WR (general purpose) only — both discrete, single-element families. Every array figure in this post is an export value, not a datasheet value, and we say so rather than imply a coverage we do not have.

What should you check before crossing an array into a BOM?

Read the Series text, not the Size column, and confirm the element count before anything else. The Size field will not warn you that a 0603 position is four resistors rather than one, and on the 0602×8 family it may not even agree with itself between two part numbers that are otherwise identical.

1. Open the Series string, every time. It is the only field in either array file that reliably states the element count.
2. Cross the whole BOM at once on the free cross-reference tool. It decodes 18 manufacturers’ part numbers and matches against 800,000+ crossable Walsin part numbers, stating every field rather than a single verdict.
3. Check ready stock before committing a footprint — that page is a dated snapshot as at 23 September 2026, not a live feed.
4. Ask us for the array datasheet. We hold none today for WA or SA; 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 chip resistor array cross reference built on the Size column alone is wrong 90.6% of the time, because 9,079 of Walsin’s 10,022 array rows report Size as a plain discrete case code. The element count lives in the Series text, not in Size, and on one series it does not even agree with itself across two otherwise identical part numbers. Add the array file to a banked 10-part signature and it becomes 13; widen the search across every thick-film family sharing it and it becomes 24 — a count we have not seen anywhere else.

Send us the array positions off your BOM with the element count written out, and we will cross each one field by field, Size column included, and tell you honestly where it disagrees with itself.

For how array and discrete parts compare field by field, see Resistor array vs discrete. For construction types across the array line, see Chip resistor arrays explained. The full range is on the Walsin chip resistor range page.

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Frequently asked questions

<!– wp:rank-math/faq-block {"questions":[{"id":"faq-question-01","title":"Does Walsin's Size column tell you how many resistors are in an array part number?","content":"Mostly not. 9,079 of the 10,022 rows across both array export files report Size as a plain case code such as 0603(1608), identical to what a single discrete resistor would show. Only 943 rows — all in the main array file — carry the element count in Size itself, written as 0602*8, 0201*4 or 0201*2.”,”visible”:true},{“id”:”faq-question-02″,”title”:”Can the same Walsin array part be reported two different ways in the same file?”,”content”:”Yes. The eight-element 0602 array ships as 555 rows reading Size 0603(1608) and another 555 reading 0602*8, under the same series name, split only by a trailing N in the part number. Resistance, tolerance, TCR and rated power are identical across both halves.”,”visible”:true},{“id”:”faq-question-03″,”title”:”How many part numbers share Walsin’s 0603, 10 kΩ, ±1%, ≦±100 ppm/°C signature once arrays are included?”,”content”:”Thirteen, once the array and anti-surge files are added to the 10-part General Purpose finding already on record. One of the thirteen, WA06X1002FTL, is a four-element array whose Size column reads 0603(1608) with no element count visible. Widened to every thick-film family sharing the signature, the count reaches 24.”,”visible”:true},{“id”:”faq-question-04″,”title”:”What resistance range does Walsin’s anti-sulfuration chip resistor array cover?”,”content”:”10 Ω to 1 MΩ across 2,772 rows, a full decade narrower at the top than the plain array file’s 1 Ω to 10 MΩ. The anti-sulfuration array also never offers the ≦±100 ppm/°C TCR grade that 571 rows of the plain array file do.”,”visible”:true},{“id”:”faq-question-05″,”title”:”Is a chip resistor array’s rated power figure per element or for the whole package?”,”content”:”Unconfirmed from what Venatech holds. Neither of Venatech’s two chip resistor datasheets covers the WA or SA array prefixes, so there is no approval sheet to resolve whether the published rated power applies per element or per package. Request the series datasheet by part number before sizing a thermal budget on it.”,”visible”:true},{“id”:”faq-question-06″,”title”:”Does Venatech hold a Walsin array datasheet?”,”content”:”No. Venatech holds 28 Walsin datasheets, 451 pages, covering MLCC and the two discrete chip resistor families MR and WR. None of the 28 covers the WA or SA array prefix, and every array figure in this post is an export value rather than a datasheet value.”,”visible”:true},{“id”:”faq-question-07″,”title”:”What is the fastest way to cross a resistor array to Walsin?”,”content”:”State the element count from the Series text, then cross the whole BOM at once. The free cross-reference tool takes a pasted list of up to 500 part numbers or an Excel or CSV file, decodes 18 manufacturers’ part numbers and matches against more than 800,000 crossable Walsin part numbers, stating every field including Size.”,”visible”:true}],”listStyle”:””,”titleWrapper”:”h3″,”titleCssClasses”:””,”contentCssClasses”:””,”sizeSlug”:””} –>

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