Home » Products » Buzzer » SMD Buzzer » TAT BM4020S-0340-17 SMD Magnetic Buzzer 4.0*2.2mm, 3V, 80dB for Mobile Phone & Anti-Lost Device

2~4v 4000HZ Hot Sell Electronic Magnetic Buzzer 70db Surface Mount 4.0mm*2.0mm Magnetic Buzzer

TAT BM4020S-0340-17 SMD Magnetic Buzzer 4.0*2.2mm, 3V, 80dB for Mobile Phone & Anti-Lost Device

The TAT BM4020S-0340-17 is a miniature SMD magnetic buzzer with compact 4.0×2.2mm footprint. Rated at 3V operating voltage and 80dB sound output, this surface mount magnetic buzzer is specially designed for slim and portable electronics such as anti-lost trackers and mobile phone accessories. It supports standard SMT reflow soldering for mass production, with clear sound and stable acoustic performance. As a professional electronic component manufacturer from China, we provide samples and customized service for bulk orders.

Model:
BM4020S-0340-17
Brand:
TAT
Code:
BM4020S-0340-17

Size:	4.04.0H2.0mm
Rated Voltage:	3 VDC
Operating Voltage:	2~5VDC
Coil Resistance:	17±3Ω
Resonant Frequency:	4000Hz
Operating Temperature:	-20℃~+70℃
Store Temperature:	-40℃~+85℃
Availability:

Quantity:



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Product Description

Key Features

Ultra compact SMD package: 4.0mm × 2.2mm small size, save PCB space
Surface mount design, compatible with SMT reflow soldering for automatic assembly
Working voltage: 3V, low power consumption for battery-powered devices
Sound level: 80dB, clear and loud audio reminder tone
Built with polarity mark and sound port for easy PCB layout
Stable acoustic performance, long service life
RoHS compliant for global export electronic products
Custom acoustic parameters available upon request
Ideal for thin portable devices, anti-lost tags and mobile accessories

Specifications

Item	Parameter
Model No.	BM4020S-0340-17
Buzzer Type	Magnetic / Electromagnetic SMD Buzzer
Mounting Type	SMD Surface Mount
Outline Size	4.0±0.3mm × 2.0±0.3mm
Height	2.2mm
Operating Voltage	3V
Sound Pressure Level	80dB
Tolerance	±0.3mm
Marking	Polarity Mark & Sound Port
Compliance	RoHS

Product Dimension & Structure

This tiny SMD magnetic buzzer adopts mini rectangular structure with a reserved sound port and +/- polarity marking on the surface. The dimension drawing offers full dimensional tolerances, helping hardware engineers complete PCB footprint design. It fits automatic SMT assembly lines, greatly improving production efficiency for mass manufacturing of small portable electronics.

Applications

Our miniature SMD magnetic buzzers are widely used for audio reminder and warning signals:

Anti-lost / anti-loss tracking devices
Mobile phone & smart phone accessories
Wearable smart electronics
Tiny IoT sensor modules
Bluetooth portable gadgets
Mini handheld electronic equipment
Small medical wearable devices

FAQ

Q1: Is this SMD magnetic buzzer active or passive? This is passive magnetic buzzer. It requires square wave drive signal from your circuit to produce sound, cannot work only with DC voltage.

Q2: Can it pass SMT reflow soldering? Yes, it is standard SMD type, compatible with normal reflow soldering process for mass production.

Q3: Can I get samples for prototype testing? Yes, we support sample supply for your performance testing. Just send us your sample request.

Q4: Does this buzzer comply with RoHS? All our SMD magnetic buzzers are RoHS compliant, meet global electronics export requirements.

Q5: What about MOQ and production lead time? Flexible MOQ. Please contact our sales team for bulk price and production schedule.