0
\$\begingroup\$

I have been trying to figure out what this part is called and what I can replace it with (see pics).

It seems to be called a capacitor, varistor, or thermistor when I do an image search. It's black and says K271u 81 on the front. It's from a 1980s Panasonic Massage Lounger, Matsushita Electric Works, Ltd.

The chair worked 2 years ago, but then we updated the wiring in the walls and the chair shorted out after turning it on. This part burned part of the circuit board. We are just now looking to fix it.

K271U 81

enter image description here

\$\endgroup\$
3
  • \$\begingroup\$ Changed the wiring? \$\endgroup\$
    – John Doty
    Commented Mar 28 at 0:16
  • \$\begingroup\$ How was this component connected? Was it In series or parallel to the AC line perhaps? Can you draw out the circuit? \$\endgroup\$
    – Nedd
    Commented Mar 28 at 0:35
  • \$\begingroup\$ @Nedd I added a picture of the circuit board, from before I took the part (varsitor?) out to read the front of it. I am assuming it’s in parallel. Do you see the pink plastic part that is burnt? Fuses keep burning out, so the varsitor(?) seems to be the issue… \$\endgroup\$
    – Lori Amel
    Commented Mar 28 at 0:48

2 Answers 2

Reset to default
0
\$\begingroup\$

The exact family / product line may be obsolete, but Panasonic (Matsushita) still make varistors, ERZ-VA7D271 for example. Any 270V (175VAC) MOV of equal or greater diameter will suffice; there is very little distinction between product lines, they all use a common formulation.

Mind that other components may be damaged. Smoke residue may be conductive or prone to tracking, and should be cleaned with alcohol, or scraping if necessary.

\$\endgroup\$
0
\$\begingroup\$

That looks like an MOV, a Metal Oxide Varistor. It is a transient suppressor rated to be connected directly across the AC powerline. It is made by Panasonic (Mitsubishi).

If all of that is correct, the rated operating voltage is 270 Vdc, or 175 Vacrms.

\$\endgroup\$
2
  • \$\begingroup\$ Do you mean Matsushita? Panasonic has nothing to do with Mitsubishi (a car manufacturer, not electronics) as far as I'm aware. \$\endgroup\$
    – Hearth
    Commented Mar 28 at 3:58
  • \$\begingroup\$ Mitsubishi is, or used to be big in electronics through some subsidiaries, but yes, I meant Matsushita. \$\endgroup\$
    – AnalogKid
    Commented Mar 28 at 13:06

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.