If you have observed bulging in the EPCOS - TDK B43541A9687M000 capacitor, as shown in the image below, and are wondering:
“What is the cause of this bulging phenomenon, and does it impact the product?”
Please refer to the clarification provided by the manufacturer below.
“The air bubble under the bottom foil is part of our technology. On the Multi Pin assembly line the bottom foils are placed by automatic vacuum pipettes, which pulls (sucks) the foil in the middle before it is placed on the can. Due to this, there is almost always some remaining air under the bottom disc.
It will not influence the insulation resistance of the capacitor and will not cause any other problem. The bottom foil is attached with enough strong force, so it will not peel off.
This is not considered as failure - the air bubble should not cover the whole bottom surface."
Applicable Part Numbers
| DigiKey Part Number | Manufacturer Part Number |
|---|---|
| 495-77464-ND | B43541B8476M000 |
| 495-B43541B8476M080-ND | B43541B8476M080 |
| 495-77465-ND | B43541B9157M000 |
| 495-B43541A7107M000-ND | B43541A7107M000 |
| 495-77460-ND | B43541B2108M000 |
| 495-77461-ND | B43541B7107M000 |
| 495-77462-ND | B43541B8157M000 |
| 495-B43541A9227M000-ND | B43541A9227M000 |
| 495-77452-ND | B43541A5567M000 |
| 495-77458-ND | B43541A9397M000 |
| 495-B43541A9477M000-ND | B43541A9477M000 |
| 495-77463-ND | B43541B8187M000 |
| 495-B43541A7337M000-ND | B43541A7337M000 |
| 495-B43541F2827M000-ND | B43541F2827M000 |
| 495-B43541B2108M080-ND | B43541B2108M080 |
| 495-B43541B6227M000-ND | B43541B6227M000 |
| 495-B43541A9687M000-ND | B43541A9687M000 |
| 495-77456-ND | B43541A8227M000 |
| 495-77455-ND | B43541A7227M000 |
| 495-B43541A7397M000-ND | B43541A7397M000 |
| B43541A8277M000-ND | B43541A8277M000 |
| 495-B43541A6477M000-ND | B43541A6477M000 |
| 495-77451-ND | B43541A5337M000 |
| B43541B8227M007-ND | B43541B8227M007 |
| B43541E2277M000-ND | B43541E2277M000 |
| 495-B43541B9157M060-ND | B43541B9157M060 |
| 495-B43541B8476M060-ND | B43541B8476M060 |
| 495-77454-ND | B43541A6686M000 |
| 495-B43541F2477M060-ND | B43541F2477M060 |
| B43541B7826M062-ND | B43541B7826M062 |
| B43541B9227M087-ND | B43541B9227M087 |
| B43541A9127M000-ND | B43541A9127M000 |
| B43541A9157M000-ND | B43541A9157M000 |
| B43541A9337M002-ND | B43541A9337M002 |
| B43541A9277M002-ND | B43541A9277M002 |
| 495-B43541B5277M060-ND | B43541B5277M060 |
| 495-B43541A9477M060-ND | B43541A9477M060 |
| B43541C8127M080-ND | B43541C8127M080 |
| 495-B43541B9477M000-ND | B43541B9477M000 |
| B43541B7127M000-ND | B43541B7127M000 |
| B43541A8157M000-ND | B43541A8157M000 |
| B43541A9397M002-ND | B43541A9397M002 |
| B43541B7157M000-ND | B43541B7157M000 |
| B43541A9687M060-ND | B43541A9687M060 |
| B43541A9477M002-ND | B43541A9477M002 |
| B43541A9477M007-ND | B43541A9477M007 |
| B43541B8187M080-ND | B43541B8187M080 |
| B43541A5477M082-ND | B43541A5477M082 |
| 495-B43541A6277M000-ND | B43541A6277M000 |
| B43541A7277M000-ND | B43541A7277M000 |
| 495-B43541A6477M060-ND | B43541A6477M060 |
| B43541B7277M007-ND | B43541B7277M007 |
| 495-B43541A6397M060-ND | B43541A6397M060 |
| 495-B43541A9687M062-ND | B43541A9687M062 |
| B43541A8277M067-ND | B43541A8277M067 |
| B43541A6397M000-ND | B43541A6397M000 |
| B43541A7397M002-ND | B43541A7397M002 |
| B43541A8476M000-ND | B43541A8476M000 |
| B43541B8686M062-ND | B43541B8686M062 |