Stackpole and Viking Chip Resistor Cross Reference to Walsin: 3,948 of 46,317 Precision Parts Carry a Looser TCR Than Their Series Name

Walsin is the only line we are authorised for. Stackpole and Viking are lines we supply, and we hold no parametric data for either. So our Stackpole and Viking chip resistor cross reference is a method plus Walsin’s measured shelf: ±0.1% at best, 25 ppm at best, 3,948 of 46,317 precision parts looser than their series name.

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Venatech Limited, an authorised Walsin distributor in Hong Kong, will not publish another manufacturer’s specifications and will not tell you a part is equivalent. What we will do is show you Walsin Technology (Walsin)’s real numbers, name the fields that have to carry across, and leave a column for the part you already have. This post is written from Walsin’s chip resistor parametric export — 137 .xlsx files, of which 73 return zero rows, leaving 234,815 rows we read and combined ourselves. Every Walsin part number below is real.

What do we hold for Stackpole and Viking, and what do we not hold?

A supply relationship and nothing parametric. We checked our own data folders: we hold 234,815 chip resistor rows for Walsin and zero rows for Stackpole and zero for Viking. We hold 28 Walsin datasheets, 451 pages, of which exactly 2 are chip resistor documents. We hold no datasheet for either of the other two lines. Saying so is the point of this section.

What a crossing question needs	What we hold for Walsin	What we hold for Stackpole	What we hold for Viking	Match / mismatch
Authorised distribution	Yes — authorised distributor, confirmable with Walsin	lines we supply	lines we supply	Mismatch — only one of the three is an authorisation and we will not blur it
Parametric export	234,815 rows, 137 files	none	none	Mismatch — we cannot read their catalogue for you
Datasheets on file	2 chip resistor PDFs of 28 documents	none	none	Mismatch
Family-level scope	58 named series in the export	chip resistors, current sense, specialty	chip resistors, thin film, precision	Match at family level only
Affected-part or lifecycle list	none, for any manufacturer	none	none	Match — we hold none and will never imply one exists

Read the last row as written. We hold no affected-part list for any manufacturer, so nothing here says or implies that any Stackpole or Viking part, series or family is discontinued, obsolete or constrained. Nobody has given us a list to read from. What we can do instead is the half of the job that is actually hard: state exactly what Walsin’s shelf reaches, so you can see before you ask whether a cross is arithmetically possible.

Which fields have to carry across when you cross a chip resistor family?

Nine, and the headline three are not enough. We took one ordinary position — 0603, 10 kΩ — and filtered the whole export on it. It returns 95 Walsin part numbers across 31 series, spanning four TCR grades, five rated-power values and eleven tolerance codes. Three fields identified the position; six more decide which of the 95 you should actually order.

Field	Walsin value on WR06X1002FTL	Walsin value on WF06J1002BTL	Your incumbent	Match / mismatch between the two Walsin parts
Case size	0603 (1608)	0603 (1608)	______	Match
Resistance	10,000 Ω	10,000 Ω	______	Match
Tolerance	±1%	±0.1%	______	Mismatch — ten times tighter
TCR	≦±100 ppm	≦±25 ppm	______	Mismatch — four times tighter
Rated power	1/10 W	1/10 W	______	Match
Series	Thick Film General Purpose	High Precision Thick Film TC25	______	Mismatch — different shelves entirely
Packaging	7″ reel taping	7″ reel taping	______	Match
Automotive grade	not an automotive part number	not an automotive part number	______	Match — neither is AEC-Q200
Part-number string safety	no embedded space	no embedded space	______	Match — but 41 of the 95 candidates at this position do have one

That last row is not pedantry. 41 of the 95 part numbers at 0603, 10 kΩ carry an embedded space — WR06X103 JTL is one — because Walsin pads a four-character resistance field with a blank when the value only needs three. Paste that string into a BOM field and the line fails, which is the subject of why Walsin part numbers do not paste into your BOM. Identify on three fields, decide on nine, and never accept a cross that silently changes one of the six you did not look at.

How tight does Walsin’s general-purpose chip resistor shelf actually go?

To ±1% and 100 ppm, and no further. We counted all 15,047 part numbers in Walsin’s general-purpose thick film series. The Tolerance column holds exactly three values across all of them: ±1% on 12,371, ±5% on 2,661, and Jumper on 15. Zero parts in the general-purpose series are tighter than ±1%. On TCR the best figure is ≦±100 ppm, on 7,350 of 15,047.

Case size, general purpose	≦±100 ppm	≦±200 ppm	≦±300 ppm	Asymmetric band	Match / mismatch against a 100 ppm requirement
01005 (0402)	0	557	135	62 at −200 to +600	Mismatch — 100 ppm does not exist at this size
0201 (0603)	0	4,980	0	828 at −200 to +600	Mismatch — 100 ppm does not exist at this size
0402 (1005)	828	0	0	140 at −200 to +400	Match — the smallest size that reaches 100 ppm
0603 (1608)	828	0	0	140 at −200 to +400	Match
0805 (2012)	828	0	0	140 at −200 to +400	Match
1206 (3216)	1,108	0	0	140 at −200 to +400	Match
1210 (3225)	714	25	0	115 at −200 to +400	Match, with 25 exceptions
1218 · 2010 · 2512	3,044 combined	420 combined	0	0	Match

The general-purpose shelf reaches 100 ppm only at 0402 and larger. At 0201 and 01005 the published figure is 200 ppm, 300 ppm or an asymmetric −200 to +600 band, on every one of the 6,562 parts at those two sizes. If your incumbent is an 0201 at 100 ppm, this shelf does not reach it — see what resistor TCR actually buys you.

Where does Walsin’s precision thick film shelf stop on TCR?

At 25 ppm, on 3,087 part numbers, in one series, at three case sizes. We measured the tightest value in every column across all 234,815 rows. The tightest tolerance anywhere is ±0.1%, on 16,103 rows. The tightest TCR anywhere is ≦±25 ppm, on 3,087 rows, every one of them in the High Precision Thick Film TC25 series. The intersection — ±0.1% and 25 ppm in the same part number — is 1,029 rows.

Walsin precision shelf	Part numbers	Tolerances published	TCR published	Case sizes	Match / mismatch against a tight incumbent
High Precision Thick Film TC25	3,087	±0.1% · ±0.25% · ±0.5%	≦±25 only	0603, 0805, 1206 only	Mismatch — no ±1% option, no 0402, no 0201, no 2010, no 2512
High Precision Thick Film TC50	14,797	±0.1% · ±0.25% · ±0.5% · ±1%	≦±50 on 13,703, ≦±100 on 1,094	0201 to 1206	Match on most, mismatch on the 1,094
High Precision Thick Film TC100	11,190	±0.1% · ±0.5% only	≦±100 on 8,906, ≦±200 on 2,284	0201 to 2512	Mismatch — no ±0.25%, and 0201 is 200 ppm
Thick Film General Purpose	15,047	±1% · ±5% · Jumper	≦±100 at best	01005 to 2512	Mismatch against anything tighter than ±1%

The 25 ppm shelf has a hard boundary a selector will not show you. We parsed every resistance value in the TC25 series: it runs from 470 Ω to 470 kΩ, 343 distinct values, one wattage per case size — 1/10 W at 0603, 1/8 W at 0805, 1/4 W at 1206. Outside 470 Ω to 470 kΩ, Walsin’s thick film catalogue does not publish 25 ppm at all. If your incumbent is a 100 Ω at 25 ppm, the honest next question is whether thin film is the right family — see thin film against thick film chip resistors. WF06J1002BTL is the real part at the tightest corner: 0603, 10 kΩ, ±0.1%, ≦±25 ppm, 1/10 W. WF12J4700BTL is the same corner at 1206 and 470 Ω, 1/4 W.

Why does a series called TC100 contain parts published at 200 ppm?

Because the series name is a family label, not a specification — and we counted how often the two disagree. Across the six TC-named High Precision Thick Film series, 46,317 part numbers, 3,948 carry a published TCR looser than the number in the series name. That is 8.5%, and we have not seen this counted anywhere.

Series	Part numbers	TCR published	Parts looser than the name	Where they sit
TC25	3,087	≦±25 on all	0	Match — the name holds everywhere
TC50	14,797	≦±50 on 13,703, ≦±100 on 1,094	1,094	Mismatch — 0201, 0402 and 0603 only
TC50 (Automotive)	8,680	≦±50 on all	0	Match
TC100	11,190	≦±100 on 8,906, ≦±200 on 2,284	2,284	Mismatch — every 0201 part in the series
TC100 (Automotive)	3,995	≦±100 on 2,850, ≦±200 on 570, −200 to +400 on 575	570, plus 575 on an asymmetric band	Mismatch — 0402 to 1210
TC100 LF100ppm	4,568	≦±100 on all	0	Match

Two things fall out of that table. First, every one of the 2,284 parts filed under TC100 at 0201 is published at 200 ppm, not 100 — the case size, not the series, decides it. WK02H10R0BTL is one: 0201, 10.0 Ω, ±0.1%, ≦±200 ppm, 1/20 W, inside a series named for 100. Second, the automotive TC100 file carries 575 parts whose TCR is written as an asymmetric −200 to +400 band, which spans 600 ppm and is not a ≦± figure at all.

Cross a precision family by series name alone and this is where it goes wrong. Cross on the published TCR of the specific part number, never the label on the folder.

What do we need from you to cross a Stackpole or Viking family line?

Six fields and one sentence about the circuit. Case size, resistance, tolerance, TCR, rated power, and whether the line is automotive. The sentence tells us which of the six you can move. With that we answer in one pass, because the 3,087, the 16,103 and the 3,948 above are measured, not estimated.

1. Paste the list. Up to 500 part numbers, or drop your Excel or CSV, into the free cross-reference tool. Filter by commercial or automotive grade and read every stated difference rather than a claimed match.
2. Send the incumbent datasheet with it. We will not reproduce another manufacturer’s specifications in public, but we will read yours against Walsin’s and tell you which of the nine fields moves.
3. Check what is physically in Hong Kong on ready stock — 1,125 part numbers as at 23 September 2026, a dated snapshot and not a live feed.

The resistor line sits on the Walsin chip resistor page. Our line runs from Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation, and nowhere else. Unit 207, 2/F, Sun Ling Plaza, 30 On Kui Street, Fanling, N.T., Hong Kong. (852) 2628 4777. Check us: UL file E182369 is searchable in UL’s own public database.

The short version

Walsin is the only chip resistor line we are authorised for. Stackpole and Viking are lines we supply; we hold no parametric data and no datasheet for either, and no affected-part list for any manufacturer. Walsin’s general-purpose shelf stops at ±1% and 100 ppm, and 100 ppm does not exist below 0402. The tightest tolerance anywhere in 234,815 rows is ±0.1% on 16,103; the tightest TCR is 25 ppm on 3,087, confined to 470 Ω–470 kΩ at three case sizes. 3,948 of 46,317 precision parts are looser than their own series name. Qualification stays with you — our job is to make sure the shelf you qualify against is the real one.

Send us the chip resistor families you are carrying from Stackpole or Viking and we will return the Walsin position field by field, including the fields where Walsin does not reach. And a question back: the last cross you accepted on a series name — did you check the TCR on the part number, or on the folder it came out of?

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Frequently asked questions

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