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HSMT5020CS-03L-4.0-12-R
HC
| Model | HSMT5020CS-03L-4.0-12-R | |||
| Rated Voltage (Vp-p) | 3 | |||
| Operating Voltage (Vp-p) | 2～5 | |||
| Resonant Frequency (Hz) | 4000 | |||
| Current Consumption (mA) | ≤100 | |||
| Sound Output at 10cm (dB) | ≥78 | |||
| Coil Resistance (Ω) | 12±2 | |||
| Operating Temperature (℃) | -20～+70 | |||
| Storage Temperature (℃) | -30～+80 | |||
| Weight (g) | 0.3 | |||
| Housing Material | LCP | |||
| RoHs | Yes | |||
The 5 x 5 x 2mm 3V 78dB 12ohm ultrathin SMD magnetic buzzer is one of the most compact buzzer formats for modern SMT-based electronics. This product is designed for applications where PCB space and product thickness are both tightly limited. In many wearable, portable, and micro-electronic devices, it is difficult to add an audible signal component without increasing the size of the final product. This 5020 mini square magnetic buzzer is created to address that challenge.
Its 5 x 5 x 2mm structure makes it especially suitable for miniature designs, while the 3V rated voltage supports common low-voltage circuit use. Although the buzzer is extremely small, it still offers minimum sound output of 78dB at 10cm, which can be sufficient for prompt, reminder, and light warning functions in close-range electronic products.
For buyers who need the smallest SMD magnetic buzzer possible without giving up SMT assembly compatibility, this model is highly relevant. It supports compact product design, automated production, and flexible use in low-profile electronic devices.
The most notable feature of this buzzer is its very small 5 x 5 x 2mm size. This makes it highly suitable for ultra-compact devices where every millimeter of PCB area matters. Products such as wearable devices, tiny medical tools, compact handheld modules, and miniature consumer electronics can benefit from this size advantage.
With only 2mm height, this buzzer is designed for slim product profiles. Low-profile structure is important in devices that must remain thin, lightweight, and easy to package. The ultrathin body helps support compact industrial design while still providing audible signal capability.
The rated voltage is 3V, and the operating range is 2V to 5V. This makes the buzzer suitable for low-voltage circuits commonly found in portable and battery-powered products. The voltage range gives designers additional flexibility during product integration.
The buzzer provides minimum sound output of 78dB at 10cm with a resonant frequency of 4000Hz. For a component of this size, the sound level is practical for near-range prompts, reminder tones, and status indications in compact products.
As a surface-mount buzzer, this model is suitable for automated SMT production. That helps manufacturers improve assembly efficiency, reduce manual placement, and support stable mass production for compact devices.
The product weighs only 0.3g and uses LCP housing material. It is also marked as RoHS compliant, which is important for many international electronics buyers and OEM projects.
In ultra-compact electronics, designers often need to balance size, thickness, voltage, sound output, and assembly method. A standard buzzer may be too large, too tall, or unsuitable for modern SMT lines. This is why micro SMD magnetic buzzers are increasingly important in product development. They allow devices to include audible feedback without compromising compact product design.
This 5020 mini square model is particularly relevant when the primary design requirement is miniaturization. It is not intended to replace larger high-output buzzers in all use cases, but it is highly effective where a small prompt sound component is needed within tight physical limits.
This 5 x 5 x 2mm 3V ultrathin SMD magnetic buzzer can be used in:
· Wearable electronic devices
· Portable consumer electronics
· Miniature medical devices
· Compact control modules
· Prompt and reminder units
· Small handheld electronics
· Space-limited PCB products
· Micro alarm and indicator modules
It is especially useful in products where physical size matters more than very high sound pressure.
OEM buyers often look for the smallest possible buzzer that still meets basic performance needs and supports SMT production. This model answers that requirement by offering a micro-sized footprint, low-profile design, and practical sound output. For developers working on compact or wearable products, this can reduce design constraints significantly.
In sourcing decisions, buyers also evaluate sample support, consistency, and customization potential. A factory capable of supporting both sample evaluation and larger volume orders is often preferred for long-term projects.
HC Electronic states that product customization is available according to customer needs. This may include project-specific voltage adjustment, packaging requirements, acoustic preferences, or structural fit optimization. Such flexibility is useful in highly customized OEM and ODM product development.
Hongchang Electronic has been manufacturing acoustic components since 1997 and has nearly 200 employees, including acoustic engineers. The company also indicates a factory area of more than 10,000 square meters. For buyers, this supports confidence in supply continuity, manufacturing experience, and project support capability.
The supplier states that quality is maintained through a complete process system and quality inspection system. For miniature buzzers, consistency is especially important because small structural differences can affect sound behavior. Stable sample-to-batch quality helps reduce sourcing risk for OEM buyers.
Recommended storage conditions are temperature from -10C to +40C and humidity from 15% to 85% RH in a stable environment. The listed shelf life is six months after delivery under sealed and unopened package conditions.
Once the package is opened, it is recommended to use the products as soon as possible to help preserve product characteristics.
The model shown on the product page is HSMT5020CS-03L-4.0-12-R.
The rated voltage is 3V, and the operating range is 2V to 5V.
The resonant frequency is 4000Hz.
The buzzer provides minimum sound output of 78dB at 10cm.
The coil resistance is specified as 12 +- 2 ohms.
It is suitable for miniature electronics, portable devices, wearable products, and other applications that require a very small SMT buzzer.
Yes. The supplier states that free samples are available, subject to sales confirmation.
Yes. The product page marks the buzzer as RoHS compliant.
· Factory established in 1997
· Long-term experience in magnetic and piezo buzzer products
· Acoustic engineering support
· Free sample support
· OEM and customization capability
· Stable production and quality management
· Factory direct cooperation for compact device projects
If you are looking for a 5 x 5 x 2mm 3V 78dB 12ohm ultrathin SMD magnetic buzzer for a highly compact electronic product, this 5020 mini square magnetic buzzer is a strong option for space-limited PCB designs. It is built for miniature devices that need a basic prompt or reminder sound without increasing the product footprint significantly.
Modern electronics continue to move toward smaller form factors. In many products, especially wearable devices, portable modules, and micro control systems, every millimeter of space matters. Designers may still need an audible indicator, but a standard buzzer can easily be too large or too tall. This is where a micro-size SMD magnetic buzzer becomes valuable. With dimensions of only 5 x 5 x 2mm, this model is designed specifically for those highly constrained applications.
The product provides a 3V rated voltage, 2V to 5V operating range, and 4000Hz resonant frequency, making it practical for low-voltage electronic circuits. Although the sound output is lower than that of larger warning buzzers, its 78dB minimum output at 10cm is appropriate for close-range prompt functions and internal notification sounds in compact products.
As a surface-mount component, it is suitable for modern automated SMT production. This is important for manufacturers producing large volumes of compact devices, because SMT compatibility helps improve assembly efficiency and consistency. For OEM buyers, another advantage is the availability of free samples and customization support, which can help accelerate product verification and sourcing decisions.
For buyers searching for terms such as smallest SMD magnetic buzzer, 5x5x2mm patch buzzer, micro SMT buzzer supplier, or 3V ultrathin magnetic buzzer, this model fits well within those use cases. It offers the key benefits of size, SMT convenience, and practical sound output for ultra-compact applications.
Whether you are developing a wearable product, miniature control board, compact medical device, or small portable electronic module, this 5 x 5 x 2mm ultrathin SMD magnetic buzzer can help you add audible feedback while preserving a very small product size.
