Sound Components (Buzzer)Pin Type Piezoelectric Sounders: Precautions When Correcting Products That Have Been Soldered in a Tilted State

Guidelines concerning the mounted sounder

Applicable Series
PKM Series (PIN type)

If the product is tilted when soldered, melt the solder again and correct the tilt. (Do not press down on the product from the top.)

If the pins touch two locations on the piezoelectric vibration plate, a short may occur, preventing any sound from being emitted.

How the failure occurs

After the product has been soldered and is pressed downward from the top, an incredibly large force will be applied to the inside of the product causing the fixing point of each pin to break. This results in the pins being pushed into the product.
When the pins are pushed through the holes in the board, if they touch the two electrodes on the piezoelectric diaphragm, a short circuit will occur, resulting in a malfunction or failure.

Case

PKM17EPP-2002-B0 PKM13EPYH4000-A0

Condition of the pins that have been pushed into the product

For reference

In order to prevent a defect due to the pins being pushed in, be careful not to apply a force exceeding the value shown below, for each product.

Maximum applied push-in force (In the case where the temperature is 25°C)
Part Number Maximum pressure applied to the pins
PKM13EPYH40* 28.0N
PKM17EPP-20* 4.4N
PKM22EPPH* 5.8N
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