MLCC Vibration and Soldering Heat Test for the United Kingdom: 26 of 28 Walsin Datasheets State Vibration, 27 State Soldering Heat in 7 Different Ways

MLCC vibration test conditions are not uniform across Walsin’s datasheets. We read all 28 for United Kingdom qualification files: 26 state a vibration test in four different strings, 27 state resistance to soldering heat in seven, and 2,294 of 24,026 export rows sit under the 10 to 2000 Hz AEC-Q200 form.

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Venatech Limited, an authorised Walsin distributor in Hong Kong, holds 28 datasheets from Walsin Technology (Walsin), 451 pages: 26 MLCC and 2 chip resistor. This post is written from the Vibration and Resistance to Soldering Heat rows of every one, read as printed text, and from the 24,026 rows of 00_ALL_MLCC_parts_combined.xlsx and the 234,815 rows of the chip resistor export. Every part number is real. Our earlier United Kingdom post, Walsin MLCC for motorsport, height and high voltage, said the export carries no vibration rating. This is the other half: what the datasheets do say.

How many Walsin datasheets state a vibration test, and with what conditions?

26 of 28, in four strings. We opened each PDF and copied the vibration row. The application guide and the WR general purpose resistor sheet have none. Eighteen MLCC sheets print 10 to 55 Hz, 1.5 mm total amplitude and 6 hours. Two safety sheets print the same numbers worded as 2 hours in each of 3 directions. Five AEC-Q200 form sheets print 10 to 2000 Hz. The MR resistor sheet prints only 5 g.

Condition as printed	Sheets	Which sheets	Export rows	Example part	Match / mismatch against 0805B103K500	Your incumbent part (fill in)
10~55 Hz, 1.5 mm total amplitude, 6 hrs (2 hrs in each of 3 directions)	18	Catalogue, General Purpose, 01005, Large Size, Middle & High Voltage, Surface Coating, Microwave RF, RH, UF, High Q, MG, HT, SH, SG, Low Profile TT, FT, Mega Cap M, Mega Cap V	21,559	0805B103K500	reference
10~55 Hz, 1.5 mm, 2 hrs each in 3 perpendicular directions, reflow-mounted on a PC board first	2	S2, S3	173 (S2 only)	S242B101K502	Match on numbers. Mismatch on wording and a mounting step the first group does not print
10~2000 Hz (5 g for 20 min), 1.5 mm, 12 cycles in each of 3 orientations (36), MIL-STD-202 Method 204	5	MT, ST, VT, RT, S2-H	2,294 (MT 2,176 and ST 118)	MT21B103K500	Mismatch on frequency band (36× the upper limit), duty and acceptance wording
5 g for 20 min, 12 cycles in each of 3 orientations, MIL-STD-202 method 204; no frequency, no amplitude	1	MR resistor	17,442 resistor rows	MR06X17R8FTL	Mismatch: two of the three parameters are not printed
No vibration row	2	Application Guide, WR resistor	45,315 resistor rows (WR)	WR06X17R8FTL	Mismatch: no vibration test on the sheet

Seven of the 25 MLCC rows that state vibration are not the common one. We have not seen this counted anywhere: the same five sheets that state 10 to 2000 Hz are the five that call their flexure row Board Flex, and none of the other 20 MLCC sheets with a vibration row does.

Do the 5 g and 1.5 mm figures on the 10 to 2000 Hz sheets fit together?

Only below about 41 Hz. We did the arithmetic on the five AEC-Q200 form sheets. If “total amplitude 1.5mm” means peak to peak, the peak displacement is 0.75 mm, and acceleration is that displacement times the angular frequency squared. At 10 Hz that is 0.3 g. At 55 Hz it is 9.1 g. At 2000 Hz it is 12,077 g. The 5 g figure is reached at 40.7 Hz.

So the sheet prints two limits, 1.5 mm and 5 g, over a band where both cannot bind at once. One possible reading is a swept test with the amplitude capped by acceleration above the crossover, but the sheet does not say so. A second oddity is shared by every MLCC sheet: all 25 print the frequency as Hz/min, a unit of frequency per minute, not a frequency. That reads as a sweep rate copied into a unit slot.

How many Walsin datasheets state resistance to soldering heat, and with which bath?

27 of 28, in seven strings. All 25 MLCC sheets with a test table and both resistor sheets print one; the application guide does not. The common string is 260±5 °C, 10±1 sec dip, preheat 120 to 150 °C for 1 minute, on 17 sheets. Four AEC-Q200 form sheets print the same bath with no preheat. The other 6 sheets print five further variants.

Condition as printed	Sheets	Which sheets	Match / mismatch against 0805B103K500 (260±5 °C, 10±1 sec, preheat)
260±5 °C dip, 10±1 sec, preheat 120 to 150 °C for 1 minute, “eutectic solder”	17	Catalogue, General Purpose, 01005, Large Size, Middle & High Voltage, Surface Coating, RF, RH, UF, High Q, MG, HT, SH, SG, TT, S2, S3	reference
260±5 °C dip, 10±1 sec, no preheat printed	4	MT, ST, VT, RT	Match on bath and dip. Mismatch: no preheat statement
260±5 °C dip, 10±1 sec, and “Reflow Soldering: Peak 260 +0/-5°C profile for Mega cap”	1	S2-H	Mismatch: two methods in one row, no preheat
270±5 °C dip, 10±1 sec, preheat 150±10 °C for 60 to 90 s	1	FT	Mismatch on bath (+10 °C) and preheat
“Reflow soldering: Peak 260±5°C”, preheat 120 to 150 °C “before immerse the capacitor in a eutectic solder”	2	Mega Cap M, Mega Cap V	Mismatch: reflow and immersion in one row
SAC solder bath 260±5 °C, 10±1 sec, un-mounted chips	1	WR resistor	Match on temperature and dip. Mismatch: SAC, not eutectic; no preheat
SAC solder bath 270±5 °C, 10±1 sec, un-mounted chips	1	MR resistor	Mismatch on bath (+10 °C)

Where do the soldering heat conditions disagree?

In four places. Both resistor sheets cover the same 0603 value at the same tolerance and print baths 10 °C apart. The Mega Cap sheets say peak 260±5 °C; the S2-H sheet says 260 +0/-5 °C for Mega cap. Mega Cap rows say “reflow” and “immerse” in one condition. The AEC-Q200 form sheets state no preheat while the commercial form states one.

The resistor pair is the sharpest. WR06X17R8FTL and MR06X17R8FTL are both 0603, 17.8 Ω, ±1 percent in Walsin’s export. The WR sheet tests in a bath at 260±5 °C; the MR sheet at 270±5 °C. We counted 62,757 resistor rows with a WR or MR prefix, 26.7 percent of 234,815, so the difference is not a corner of the catalogue. It does not mean one part is better: each sheet prints its own acceptance limits and we do not compare them here.

The Mega Cap pair is the one we expect a UK test house to notice. A peak of 260±5 °C allows 265 °C; 260 +0/-5 °C does not. Both are printed on sheets dated May to August 2026. Neither series has a row in the export, so the cross-reference tool cannot offer either; the numbers exist on paper only. On the AEC-Q200 form sheets the preheat line is simply absent, which we report as absent and not as zero.

How much of the Walsin export does each condition reach?

Nine rows in ten sit under the common soldering heat string. 21,724 of 24,026 export rows (90.4%) sit under 260±5 °C with a preheat, 2,294 (9.5%) under the AEC-Q200 form with none, and 8 under FT’s 270±5 °C. For vibration, 21,559 rows (89.7%) are 10 to 55 Hz, 173 (0.7%) are S2, and 2,294 (9.5%) are 10 to 2000 Hz.

Export series	Rows	Vibration condition	Soldering heat condition	Example part	Match / mismatch against the commercial form
General Purpose and 9 other commercial series	19,962	10~55 Hz	260±5 °C with preheat	0805B103K500	reference
SH and SG soft termination	1,589	10~55 Hz	260±5 °C with preheat	SH21B103K500	Match on both
S2 safety	173	10~55 Hz, reflow-mounted first	260±5 °C with preheat	S242B101K502	Match on heat. Mismatch on the mounting step
MT automotive	2,176	10~2000 Hz	260±5 °C, no preheat	MT21B103K500	Mismatch on both
ST soft termination automotive	118	10~2000 Hz	260±5 °C, no preheat	ST21B103K500	Mismatch on both
FT feed through	8	10~55 Hz	270±5 °C, preheat 150±10 °C	FT21B103M500	Mismatch on heat

For a stock view: the Hong Kong ready-stock snapshot as at 23 September 2026 lists 864 MLCC part numbers, of which 762 match an export row. None of the 762 is MT, ST or FT. If your qualification needs the 10 to 2000 Hz form, ready stock will not show it from that snapshot, and the mounting guidance sits in MLCC reflow profile and mounting.

What should a UK qualification file ask for?

Three things. A UK test house or a customer’s quality team should ask which of the four vibration strings and seven soldering heat strings applies to the exact part number, whether the test was run on the part’s own series or inherited from a sibling, and whether the preheat was applied. Of 27 sheets with a heat row, 7 print no preheat.

1. Series, not family. The bath is 260±5 °C on 23 of 27 sheets, a 260 °C reflow peak on 2 and 270±5 °C on 2; the preheat is absent on 7.
2. The vibration band. 10 to 55 Hz and 10 to 2000 Hz are 36× apart at the upper limit. A part qualified under the first has not been shown by its sheet to survive the second.
3. The test report. We hold datasheets, not test reports. An AEC-Q200 series is a compliance claim, not a certificate; ask Walsin for the qualification report for your exact part number.

We will not tell you a part passes your vibration profile. We will show you which string the sheet prints. The range sits on the MLCC page.

The short version

We counted: 26 of 28 datasheets state vibration in four strings (18 + 2 + 5 + 1), and 27 state resistance to soldering heat in seven (17 + 4 + 1 + 1 + 2 + 1 + 1). All 25 MLCC vibration rows print the frequency as Hz/min. The five 10 to 2000 Hz sheets print 5 g and 1.5 mm, which fit together only below about 41 Hz. Mega Cap M and V print peak 260±5 °C; S2-H prints 260 +0/-5 °C for Mega cap. WR tests at 260 °C and MR at 270 °C on the same 0603 value. 2,294 of 24,026 export rows sit under the AEC-Q200 form. We hold 28 Walsin datasheets, 451 pages, sent on request. Confirm against both datasheets and qualify in your own circuit.

Send us the part numbers in your UK qualification file and the vibration band you need. We will tell you which sheet row applies to each and which we cannot confirm. Venatech Limited, Unit 207, 2/F, Sun Ling Plaza, 30 On Kui Street, Fanling, N.T., Hong Kong, (852) 2628 4777, or paste up to 500 part numbers into our free cross-reference tool. One question back: when a test house signed off “vibration”, which of the four strings did it mean?

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Frequently asked questions

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