9mm X 4.5mm 3V Magnetic Buzzer / Smallest SMD Buzzer

The 9mm x 4.5mm 3V magnetic buzzer is a compact acoustic component designed for small electronic products that need a clear prompt tone in a limited installation area. The market often describes this model as a smallest SMD buzzer because of its slim structure and SMT-friendly design. Based on the product category and electrical data, it is best understood as an SMD magnetic transducer or passive SMD buzzer for externally driven applications.
With rated voltage of 3V, operating voltage range of 2V to 5V, resonant frequency of 2731Hz, minimum sound output of 90dB at 10cm, and current consumption of 80mA maximum, this model offers a good balance of compact size, sound pressure, and stable performance. For buyers looking for a reliable 3V magnetic buzzer supplier, HC Electronic provides factory-direct support, free samples, and OEM customization.

Model:
HCMT9045AS-03L-2.731-16-R
Brand:
HC
Product name: passive smd buzzer
Application: smd transducer buzzer
Rated Voltage (Vp-p): 3V
Operating Voltage (Vp-p): 2-5V
Resonant Frequency (Hz): 2731
Sound Output at 10cm (dB): ≥90
Current Consumption (mA): ≤80
Coil Resistance (Ω): 32±5

Availability:



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Product Description

Model		HCMT9045AS-03L-2.731-16-R
Rated Voltage (Vp-p)		3
Operating Voltage (Vp-p)		2～5
Resonant Frequency (Hz)		2731
Current Consumption (mA)		≤80
Sound Output at 10cm (dB)		≥90
Coil Resistance (Ω)		32±5
Operating Temperature (℃)		-20～+80
Storage Temperature (℃)		-30～+85
Weight (g)		0.6
Housing Material		LCP
RoHs		Yes

Product Overview

The 9mm x 4.5mm 3V magnetic buzzer is suitable for manufacturers that need a compact SMD acoustic component with stable sound pressure and reliable production quality. Because the online product title also references 5V and smallest SMD buzzer search terms, this model is well positioned for buyers searching broad keyword combinations related to compact transducers and low-voltage buzzer solutions.

From an engineering perspective, the product belongs to the SMD magnetic transducer passive category. That makes it suitable for designs using an external signal source instead of a built-in oscillator. Its compact 9mm x 4.5mm body helps save installation space while still delivering strong sound output for prompts, alerts, and functional reminders.

For procurement teams, this model answers key sourcing requirements including compact size, usable voltage range, clear sound level, environmental performance, RoHS compliance, and OEM support. HC Electronic can support both evaluation and bulk purchasing, which helps reduce sourcing risk for long-term projects.

Detailed Features

Compact body for space-limited electronics

The 9mm x 4.5mm size makes this model suitable for miniaturized electronic products and dense SMT layouts where installation space is limited.

3V platform with broader operating range

The rated voltage is 3V, while the operating range extends from 2V to 5V. This makes the component useful for low-voltage product designs and flexible test conditions.

Strong sound pressure for a small SMD package

With sound output of at least 90dB at 10cm, this model can provide a clear alert or prompt tone even though the package remains compact and lightweight.

2731Hz resonant frequency for stable tone output

The resonant frequency supports practical use in status prompts, reminder tones, and warning applications where a clear and recognizable sound is required.

LCP housing and lightweight structure

The LCP housing and 0.6g weight help support stable performance, compact integration, and efficient handling in SMT-oriented production environments.

Factory supply for OEM and bulk orders

HC Electronic supports free samples, customization, and factory-direct communication for customers evaluating standard models or preparing bulk purchasing programs.

Applications

This 9mm x 4.5mm 3V magnetic buzzer is suitable for a range of products and industries, including:

· Portable consumer electronics

· Compact SMT transducer modules

· Control panels and operation prompts

· Medical electronic reminder devices

· Alarm and warning circuits

· Smart handheld products

· Automotive auxiliary electronic modules

· Small appliance prompt tone systems

Why This Product Matches Buyer Search Intent

Buyers often search using phrases such as 3V magnetic buzzer, smallest SMD buzzer, passive SMD buzzer, 9mm x 4.5mm transducer, or compact magnetic buzzer supplier. This model fits those search intents because it combines a compact footprint, strong sound pressure, and factory sourcing support in one standard part.

For SEO and conversion, the most important commercial questions are size, voltage, sound level, frequency, MOQ, sample support, and customization. This document is structured to answer those questions clearly and help a buyer decide whether to request a quotation.

Why Choose HC Electronic

HC Electronic is a manufacturing enterprise established in 1997 with long-term production experience in buzzers, speakers, piezo elements, and related acoustic products. The company has around 185 employees, including acoustic engineers, and supports both standard product supply and customized development.

Customers benefit from free sample support, stable lead time, quality control processes, and direct factory communication. These strengths are important for buyers who need a dependable buzzer manufacturer for ongoing projects.