NEWS

Stackpole CSRW Current-Sense Resistors for Italy’s Appliance Electronics: Italian Makers Build Over 22 Million Appliances a Year, and No Walsin Wide-Terminal Part Goes Below 0.1 Ohm

For Italian appliance boards that sense motor or heater current with a milliohm-range chip resistor, Stackpole’s CSRW series starts at 0.01 ohm. Walsin’s wide-terminal low-ohm series starts at 0.1 ohm on all 144 part numbers; only its reverse series reaches 0.010 ohm, and only up to 1206.

Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this for a design or sourcing engineer at an Italian appliance maker or one of its electronics suppliers who is looking for a second source for a low-ohm sense resistor. Walsin Technology (Walsin) is the only line we are authorised for; Stackpole Electronics (SEI) is a line we supply. The Walsin counts come from our chip resistor export (234,815 rows, 234,401 distinct part numbers), re-measured on 10 November 2026. The Stackpole figures come from Stackpole’s CSRW datasheet fetched the same day.

How many appliances does Italy build, according to APPLiA Italia?

More than 22 million a year. In a press release dated 5 December 2025, APPLiA Italia and AIRES stated annual national production of above 22 million appliances, turnover above 19 billion euros, and that 70 percent of the companies in the appliance bonus scheme have production in Italy.

We read that release on 10 November 2026. These are the associations’ figures, not ours. The same release says the scheme drew over 1 million applications and about 300,000 vouchers in its first phase. Our inference is narrow: appliance volume of that order means many motor-drive and heating-control boards, and each needs a way to read current. We say nothing about what any named maker buys.

What is Stackpole’s CSRW series, and what does its datasheet state?

A thick film current-sense resistor with long-side terminations. Stackpole’s CSRW datasheet, read on 10 November 2026, lists three bodies, CSRW0508, CSRW0612 and CSRW1225, with a resistance range of 0.01 to 0.75 ohm, tolerances of 1 and 5 percent, TCR from plus or minus 100 to 600 ppm per degree Celsius, and operating temperature from minus 55 to plus 155 degrees Celsius.

Stackpole’s CSRW sheet gives power ratings up to 3 W: the standard bodies carry 0.5 W, 0.75 W and 1.5 W, and the -HP versions carry 1 W, 1.5 W and 3 W. It also states voltage proof of 300 V for CSRW0508 and 400 V for CSRW0612 and CSRW1225.

Which Walsin low-ohm series sits closest to CSRW, field by field?

Two do, and neither covers the whole range. We checked every low-ohm series in the Walsin export: the Reverse series has 256 part numbers from 0201 to 1206 at 0.010 ohm and up, and the Wide Terminal Power Low Ohm series has 144 part numbers at 0612, 1020 and 1225, all starting at 0.100 ohm.

Whether Walsin’s “Reverse” and “Wide Terminal” names describe the same termination geometry as Stackpole’s long-side terminations has to be checked on both drawings. The comparison below is on the export fields only. The last column is for your incumbent.

Stackpole body (datasheet)	Stackpole power (standard / HP)	Closest Walsin part	Walsin series, size and range	Walsin power	Match / mismatch
CSRW0508	0.5 W / 1 W	`WW08CR010FTL`	Reverse, 0805, 0.010 ohm and up	1/3 W	Match on the 0.01 ohm floor; mismatch on power (1/3 W against 0.5 W)
CSRW0612	0.75 W / 1.5 W	`WW12LR100FTL`	Wide Terminal Low Ohm, 0612, 0.100 to 0.910 ohm	1 W	Match on size code; mismatch on the 0.01 ohm floor (0.1 ohm here)
CSRW1225	1.5 W / 3 W	`WW25LR100FTL`	Wide Terminal Low Ohm, 1225 (3264), 0.100 to 0.910 ohm	2 W	Match on size code; mismatch on the 0.01 ohm floor and the 3 W HP rating

Why does the 0.01 to 0.09 ohm decade matter for an Italian appliance board?

Because it is where a high-current sense resistor usually lives, and Walsin’s larger bodies are empty there. We counted the decade from 0.010 to 0.099 ohm in the export: 247 of the 256 reverse-series part numbers sit in it, at 0201 to 1206 only, and the wide-terminal low-ohm series has 0 of 144.

The 0612 and 1225 bodies, the sizes where CSRW reaches 0.75 W and above, therefore have no Walsin part number below 0.1 ohm. For a given current, a larger resistor value means more voltage and more dissipation in the shunt, so the designer either accepts that, moves to a smaller body at lower power, or looks at Walsin’s metal plate series, which goes much lower. Our post on low-ohm current sense: thick film or metal explains the trade. We have not seen this decade counted elsewhere.

What is on the Hong Kong shelf in these series?

None of them. We read the stock list as at 23 September 2026: it holds 254 chip resistor lines, and 0 are in the Reverse or the Wide Terminal series; the closest are 3 low-ohm lines, WW08WR270FTL, WW08WR390FTL and WW08WR470FTL, all 0805 at 1/4 W.

Those three are 0.27, 0.39 and 0.47 ohm. The ready stock list is a dated snapshot, never live-synced. Ask through the site for current availability and for a to-order enquiry.

How can Venatech help an Italian appliance electronics team?

How Venatech helps begins with a free paste box. The cross-reference tool, VenaMatch, decodes 18 manufacturers’ part numbers and covers 800,000+ crossable parts. Paste up to 500 part numbers, or an Excel or CSV file, and each Walsin candidate returns with every field marked match or mismatch. Upload a full BOM for a review, and see the chip resistor range.

Worked example from our own export: a 0.05 ohm thick film sense resistor at 0612 returned zero part numbers in Walsin’s wide-terminal low-ohm series, while the same value at 0805 returns reverse-series candidates at 1/3 W. We would rather say so than hand you a long list that fails. We hold no office, entity or stock in Italy; we serve from Hong Kong in small lots, and you request a quote through the site. We hold no ISO 9001 or IATF 16949 certificate, and we give no legal, customs or conformity advice. Qualification stays with you.

The short version

Stackpole CSRW runs 0.01 to 0.75 ohm in three bodies; Walsin’s wide-terminal series starts at 0.1 ohm.
Walsin reaches 0.010 ohm only in the reverse series, up to 1206 and 1/2 W.
CSRW power values are inferred from a hard-to-read table; confirm with Stackpole.
None of these Walsin series is on our 23 September 2026 shelf.

Paste your sense-resistor list into the free cross-reference tool and read each field as match or mismatch. Qualification stays with you.

Frequently asked questions

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How many appliances does Italy produce each year?

APPLiA Italia and AIRES stated above 22 million appliances a year in a release dated 5 December 2025, with turnover above 19 billion euros. These are the associations’ figures, not ours.

What resistance range does Stackpole CSRW cover?

0.01 to 0.75 ohm, in 1 and 5 percent tolerance, per Stackpole’s CSRW datasheet read on 10 November 2026. The power values were hard to read, so confirm them against the current datasheet for your exact part number.

Does Walsin have a wide-terminal low-ohm part below 0.1 ohm?

Not in our export. All 144 part numbers in the Wide Terminal Power Low Ohm series start at 0.100 ohm, at 0612, 1020 and 1225. The reverse series reaches 0.010 ohm, up to 1206.

Which Walsin part is nearest to a CSRW0508?

WW08CR010FTL, a reverse-series 0805 at 0.010 ohm, matches the resistance floor, but its rating is 1/3 W against 0.5 W. Compare TCR, voltage and termination too, and qualify in your own circuit.

Is Stackpole an authorised Venatech line?

No. Venatech is authorised for Walsin only. Stackpole is a line we supply. We give no price, lead time or stock guarantee, and the ready stock list is a snapshot dated 23 September 2026.

Do you hold stock or an office in Italy?

No. We hold no office, entity or stock in Italy; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen. We give no legal, customs or conformity advice; confirm with your compliance team.