How to distinguish the foot position of patch buzzer? Generally, the square of the patch buzzer has 3 ~ 4 welding feet, but only two welding feet are connected with the internal coil, and the other two welding feet are designed for flat and firm welding of the product. For the patch buzzer with side pronunciation, the two feet opposite the pronunciation hole are generally positive and negative poles.


However, due to the unforeseen lines designed by individual customers, we also change the pin polarity of our products according to the customer's lines. Therefore, the same product has many different polarity positions, so we do not recommend judging the positive and negative poles of the product by appearance.
When customers design or need to use this kind of buzzer, they predict it first and then design it. The received samples can be distinguished according to the positive and negative poles marked in the specification; You can also adjust the multimeter to the resistance gear to connect one end of the product appearance or identification. This end is the positive pole of the product, and the other measuring pen is connected to another welding pin in turn. When connected to any pin with resistance display, it can be determined that this end is the negative pole of the product.
Using rich sound and mechanical design technology and high-performance ceramic materials, a patch buzzer is developed. This buzzer is suitable for thin and high-density design products of electronic equipment.
The advantages of this kind of patch buzzer are high sound pressure level, clear sound and reflow soldering. The sound pressure level is 75db, the working voltage range is 25V, the working temperature range is - 20 ℃ to + 70 ℃, and the storage temperature range is - 30 ℃ to 80 ℃.