Products Details
| Operating Mode | Piezoelectric type |
| Material | paper box |
| Mounting Type | Lead type |
| Size / Dimension | 21mm(0.83in) |
| Description | Buzzer for 21mm alarm |
| Application | alarm |
| Features | Small size and low power consumption |

FAQ
1. What is a 21mm full electrode piezo disc?
A 21mm full electrode piezo disc is a piezoelectric component with full-surface electrodes used for sensing, sound generation, and transducer applications.
2. What applications use a full electrode piezo disc?
A full electrode piezo disc is commonly used in buzzers, ultrasonic devices, vibration sensors, acoustic modules, and industrial transducers.
3. Why choose a 21mm piezo disc for OEM products?
A 21mm piezo disc offers a compact footprint, stable piezoelectric performance, and easy integration into OEM and custom electronic designs.
4. What does full electrode mean in a piezo disc?
Full electrode means the piezo disc has electrode coverage across the active surface for efficient signal transfer and consistent piezoelectric response.
5. Is the 21mm piezo disc suitable for vibration sensing?
Yes, the 21mm piezo disc is suitable for vibration sensing because it provides a reliable piezoelectric output under mechanical stress.
6. Can this piezo disc be used in ultrasonic devices?
Yes, the 21mm full electrode piezo disc is commonly used in ultrasonic devices and other acoustic transducer applications.
7. Is the piezo disc easy to integrate into assemblies?
Yes, the 21mm piezo disc is designed for easy integration into electronic assemblies, prototyping builds, and mass production.
8. Who buys 21mm full electrode piezo discs?
Electronics manufacturers, OEM buyers, device builders, and industrial sourcing teams often purchase 21mm full electrode piezo discs.
9. What are the benefits of a piezoelectric disc with full electrodes?
A piezoelectric disc with full electrodes provides stable output, strong sensitivity, and efficient performance in sensing and sound generation.
10. Can this piezo disc be used for custom projects?
Yes, the 21mm full electrode piezo disc is well suited for custom piezoelectric projects, product development, and engineered solutions.







