2.9kHz 5-25V 100dB loud sound Piezo buzzer
Specification
100dB 5-25V Active Piezo Buzzer for Industrial Alarm Systems
The MANORSHI MSPS33A29W70V10 is a high-output active piezo buzzer designed for audible warning, equipment status indication and fault notification applications. It operates across a wide 5-25VDC voltage range and produces a strong 2.9kHz alert tone for industrial equipment, electronic control systems and alarm devices.
With a rated voltage of 10VDC, minimum 100dB sound output and a compact 32.5 × 23.1mm body, this DC piezo buzzer provides clear acoustic signaling without requiring a separate external oscillator circuit. The attached wire leads allow flexible installation inside control panels, machines, enclosures and other electronic assemblies.
Model MSPS33A29W70V10 is suitable for OEM engineers, industrial equipment manufacturers and electronic product developers looking for a loud, compact and easy-to-integrate piezoelectric alarm buzzer.
Key Features of the MSPS33A29W70V10 Piezo Buzzer
Minimum 100dB sound output for clear audible warning and equipment alarm signals.
Wide 5-25VDC operating voltage range for integration into different DC control systems.
10VDC rated voltage for stable operation under the specified test conditions.
2900±500Hz resonant frequency produces a distinctive and recognizable warning tone.
Active piezo buzzer design supports direct DC operation without a separate frequency generator.
Maximum rated current of 25mA helps limit power consumption in electronic alarm circuits.
Wire lead connection provides installation flexibility inside machinery and control panels.
Operating temperature range from -20°C to +65°C for general industrial and electronic applications.
Compact 32.5 × 23.1mm structure simplifies integration where installation space is limited.
Technical Specifications
| Parameter | Specification |
| Model / Type | MSPS33A29W70V10 |
| Product Type | Active piezo buzzer |
| Dimensions | 32.5 × 23.1mm |
| Minimum Sound Output at 30cm | 100dB |
| Rated Voltage | 10VDC |
| Operating Voltage | 5-25VDC |
| Maximum Rated Current | 25mA |
| Resonant Frequency | 2900±500Hz |
| Operating Temperature | -20°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Weight | 20g |
| Electrical Connection | Wire leads |
Product Datasheet
Review the official product datasheet before completing the circuit design, panel opening, wiring arrangement or production approval process.
Download MSPS33A29W70V10 PDF Datasheet
How the Active Piezo Buzzer Works
An active piezo buzzer contains the circuitry required to generate its operating tone. When the correct DC voltage is applied, the internal circuit excites the piezoelectric element and converts the electrical input into an audible alarm signal.
This design reduces the need for an external oscillation circuit, making the buzzer easier to integrate than many passive piezo transducers. Engineers can control the alarm by switching the DC supply through a transistor, relay, controller output or another suitable switching device.
The 2900±500Hz operating frequency is suitable for warning and notification functions where the tone must remain noticeable against normal equipment noise. Actual perceived loudness may vary according to applied voltage, installation orientation, enclosure structure, sound-port clearance and measurement distance.
Typical Applications
The MSPS33A29W70V10 loud piezo buzzer can be considered for a wide range of audible warning and electronic signaling applications, including:
Industrial machinery fault alarms and operating-status notifications.
Electrical cabinets, control panels and automation equipment.
Security alarm devices and access-control equipment.
Timers, counters, monitoring devices and electronic instruments.
Battery chargers, power supplies and power-management equipment.
Home appliances and commercial electronic equipment.
Parking equipment and vehicle-related warning systems.
Medical or laboratory equipment requiring an audible status alert, subject to the applicable product approval requirements.
OEM electronic products that require a compact 5-25VDC audible warning device.
Electrical Integration Guidelines
Confirm that the available DC supply remains within the specified 5-25VDC operating range under normal operation, startup, charging and fault conditions. The rated voltage is 10VDC, while the wider operating range provides flexibility for different electronic platforms.
Observe the positive and negative wire polarity during assembly. Reverse-polarity protection should be considered where incorrect wiring is possible. The control circuit should also be capable of handling the buzzer current and any startup variation.
When the buzzer is controlled by a microcontroller, programmable logic controller or low-current digital output, use an appropriately rated transistor, MOSFET, driver IC or relay instead of connecting the buzzer directly to an output that cannot supply the required current.
The final system should be tested at the actual supply voltage and inside the finished product enclosure. Sound pressure measured in an open test environment may differ from the perceived sound level after the buzzer is installed behind a panel, grille or protective housing.
Installation and Acoustic Design Recommendations
Keep the sound-emission opening clear of wires, foam, labels and enclosure walls.
Do not seal or obstruct the acoustic outlet unless the enclosure has been acoustically validated.
Use the product drawing to confirm the panel opening, body clearance and mounting dimensions.
Avoid excessive mechanical stress on the buzzer housing and wire-lead connection points.
Route the buzzer wiring away from sharp edges, moving components and excessive heat sources.
Test the audible warning against real machinery noise and at the expected operator distance.
Confirm that the selected mounting position does not allow water, oil, dust or other contaminants to enter unless the complete assembly has been designed and approved for that environment.
Why Select This 100dB Piezo Alarm Buzzer?
This model combines a strong acoustic output, broad DC input range and compact installation format. It is particularly useful when an OEM design must support different supply configurations without replacing the audible warning component for every voltage platform.
The active operating design also simplifies the electronics required to produce an alarm tone. Compared with an externally driven passive piezo transducer, an active buzzer can reduce circuit-development work when a fixed warning sound is sufficient.
For applications requiring a programmable melody, variable frequency, special pulse sequence or software-generated sound pattern, a passive piezo buzzer or a customized sounder solution may be more appropriate.
Active Piezo Buzzer Selection Checklist
Before approving the MSPS33A29W70V10 for production, confirm the following engineering requirements:
Available DC input voltage and voltage tolerance.
Required sound pressure level and measurement distance.
Desired alert frequency and tone type.
Maximum allowable current consumption.
Operating and storage temperature conditions.
Installation space, panel opening and enclosure thickness.
Wire length, connector and polarity requirements.
Environmental exposure and enclosure protection requirements.
Regulatory, industry and end-product certification requirements.
Piezo Buzzer Manufacturer and OEM Support
MANORSHI supplies active piezo buzzers, passive piezo transducers, SMD buzzers and other acoustic components for electronic and industrial applications. Buyers can compare this model with additional products in the piezo buzzer product range and the active piezo buzzer category.
When requesting a quotation, provide the required quantity, operating voltage, sound output, tone type, wire or connector requirements, installation method and target application. Complete project information helps the supplier verify whether the standard MSPS33A29W70V10 model is suitable or whether another buzzer configuration should be considered.
Frequently Asked Questions
Is the MSPS33A29W70V10 an active or passive piezo buzzer?
The MSPS33A29W70V10 is an active piezo buzzer. It is designed to generate an audible alert tone when the correct DC voltage is applied, without requiring a separate external oscillation signal.
What is the operating voltage of this 100dB piezo buzzer?
The specified operating voltage range is 5-25VDC, and the rated voltage is 10VDC. Engineers should verify the available supply voltage under both normal and transient operating conditions.
How loud is the MSPS33A29W70V10 alarm buzzer?
The specification table lists a minimum sound output of 100dB at 30cm. Actual sound performance in the finished product can vary according to supply voltage, enclosure design, mounting position, sound-port clearance and surrounding noise.
What frequency does the 2.9kHz active buzzer produce?
Its specified resonant frequency is 2900±500Hz. This frequency range creates a noticeable electronic warning tone suitable for alarms, machinery notifications and control-panel indicators.
Can this DC piezo buzzer connect directly to a power supply?
As an active buzzer, it can operate from a suitable DC power source within the specified voltage range. The circuit must observe polarity and provide sufficient current. A transistor, MOSFET, relay or driver IC may be required when the buzzer is controlled by a low-current digital output.
Can the buzzer be controlled by a microcontroller or PLC?
Yes. A microcontroller or PLC can switch the buzzer through an appropriately rated driver stage. The control output should not power the buzzer directly unless its voltage and current ratings are sufficient.
Is this piezoelectric buzzer suitable for industrial machinery?
It can be considered for equipment fault alarms, machine-status indicators, electrical cabinets and industrial control systems. Final suitability depends on the required sound level, environmental conditions, mounting design and applicable equipment standards.
What is the operating temperature range?
The specified operating temperature range is -20°C to +65°C. The storage temperature range is -40°C to +85°C.
Is the MSPS33A29W70V10 a continuous-tone buzzer?
An active buzzer normally generates its preset alert tone while the correct DC supply is applied. Buyers requiring a specific continuous, intermittent, pulse or custom sound pattern should confirm the tone behavior in the datasheet or sample before mass production.
How should I request a quotation for this active piezo buzzer?
Provide the model number MSPS33A29W70V10, required quantity, target application, supply voltage, wire or connector requirements and expected delivery schedule. For new equipment projects, include the installation drawing and acoustic requirements where available.