Home » Products » Buzzer » Magnetic Buzzer » TAT BM9042-0327-16 Magnetic Buzzer, Pin Mount 9.0*4.2mm, 2.5V 2731Hz Active Electromagnetic Buzzer

TAT BM9042-0327-16 Magnetic Buzzer Pin Mount 9.0*4.2mm 2-5Vo-p 2731Hz

TAT BM9042-0327-16 Magnetic Buzzer, Pin Mount 9.0*4.2mm, 2.5V 2731Hz Active Electromagnetic Buzzer

TAT BM9042-0327-16 is an active electromagnetic magnetic buzzer with pin through-hole mounting design. It features compact size Φ9.0×4.2mm, operates at 2.5V, with resonant frequency 2731Hz. The two-pin structure is convenient for direct soldering on PCB board. It produces clear and stable prompt beep tone, widely adopted for small consumer electronics reminder and alarm functions. We are the direct manufacturer and provide samples and custom service for bulk orders.

Model:
BM9042-0327-16
Brand:
TAT
Code:
BM9042-0327-16

Style:	Electro-magnetic buzzer
Rated Voltage:	3Vo-p
Operating Voltage:	2-5Vo-p
Rated Current:	Max.80mA,at 2731Hz 50% duty Square Ware 3Vo-p
Sound Output at 10cm:	Min.85dB,at 2731Hz 50% duty Square Ware 3Vo-p
Coil Resistance:	16±4Ω
Resonant Frequency:	2731Hz
Availability:

Quantity:



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Product Description

Key Features

Active electromagnetic magnetic buzzer, built-in drive coil
Pin through-hole mounting, easy soldering on PCB
Mini compact dimension: Φ9.0 ±0.3mm, height 4.2 ±0.2mm
Rated operating voltage: 2.5V, resonant frequency:2731Hz
2 pins of Φ0.6mm, clear polarity marking (+/-) to avoid wrong welding
Small footprint, save PCB space for mini electronic devices
Stable acoustic output, consistent beep sound
Black plastic housing with reliable structure
RoHS compliant for global electronics export
Factory direct supply, competitive wholesale price
Sample available for prototype performance test, custom service acceptable

Specifications

Item	Parameter
Model	BM9042-0327-16
Buzzer Type	Active Magnetic / Electromagnetic Buzzer
Mounting Type	Pin Through Hole
Outer Diameter	Φ9.0 ±0.3 mm
Body Height	4.2 ±0.2 mm
Pin Quantity	2 Pins
Pin Diameter	Φ0.6 mm
Rated Voltage	2.5V
Resonant Frequency	2731Hz
Polarity	Marked (+) / (-)
Compliance	RoHS

Product Dimension & Structure

This miniature magnetic buzzer adopts round cylindrical housing. The engineering drawing shows complete outline size and pin layout. Two straight pins with polarity marking help engineers arrange PCB pad layout and prevent reverse soldering. The tiny 9mm diameter is ideal for space-limited compact electronic boards.

Applications

Our pin-type magnetic buzzers are widely used for audio prompt and warning signals:

Household small appliances
Portable medical reminder equipment
Smart sensors & detection modules
Handheld testing instruments
Security & access control devices
IoT small electronic products
Consumer electronic reminder alarms

FAQ

Q1: Is this magnetic buzzer active or passive? This is active electromagnetic buzzer. It can sound directly when supplied with rated DC voltage.

Q2: What is the mounting way? Through-hole pin mount, directly soldered onto PCB.

Q3: Can we reverse the positive and negative pins? Polarity is marked on buzzer body. Reverse connection may affect sound performance, please follow the +/- marking.

Q4: Can I get samples for testing? Yes, we support sample supply for your prototype and acoustic verification.

Q5: Can we customize frequency or pin length? Custom parameters are available for bulk quantity orders.

Q6: Is this buzzer RoHS compliant? Yes, it meets RoHS requirements for worldwide electronic product export.