Magnetic Transducer

Picture	Manufacturer No.	Size	Rated Voltag (V)	Operating Voltage (V)	Current Consumption (mA)	SPL (dB)	Resonant Frequency (Hz)	Description	Datasheet	Order
	FBMT1254	12*5.4	1.5	1～2	≤30	≥80@10cm	2048±500	D12mm H5.4mm electronicmagnetic buzzer		Send Order
	FBMT1275C	12*7.5	1.5	1～2	≤30	≥80@10cm	2048±500	12*7.5mm side hole magnetic tone buzzer with pin		Send Order
	FBMT1285	12*8.5	1.5	1～2	≤30	≥80@10cm	3100±500	12*8.5mm passive electromagnetic toy buzzer		Send Order
	FBMT1290	12*9	5	4～8	≤40	≥85@10cm	2400±500	12*9.0mm magnetic passive piezo transducer		Send Order
	FBMT6636	6.6*3.6	3	2～4	≤80	≥80@10cm	2700±500	dia 6.6mm miniature pin buzzer		Send Order
	FBMT9040	9*4	3	2～4	≤80	≥85@10cm	2731±500	9*4mm 16ohm PCB mount buzzer		Send Order
	FBMT9040SH	9*4	3	2～4	≤80	≥85@10cm	2731±500	9mm 3.6v electro-magnetic buzzer with pin		Send Order
	FBMT9042	9*4.2	3	2～4	≤80	≥85@10cm	2731±500	9x4.2mm 3v electro-magnetic buzzer		Send Order
	FBMT9055	9*5.5	1.5	1～2	≤80	≥80@10cm	3100±500	9x5.5mm passive magnetic transducer with PCB mount		Send Order
	FBMT9605	9.6*5	1.5	1～2	≤80	≥85@10cm	2731±500	9.6mm 3V PCB mount buzzer		Send Order
	FBMT2512	25*12	12	8～14	≤55	≥85@10cm	800±500	25*12 12V 120OHM ELECTROMAGNETIC passive buzzer 25*12mm used for automobile meters		Send Order

• Magnetic Transducers

  The advantages of FBelec electromagnetic buzzer

• 

  1. High volume
  The electromagnetic buzzer uses the principle of electromagnetic induction to generate vibration, and the sound propagation has a large amplitude, which can output a large volume and has a strong warning effect.
  
  2. Good stability
  The electromagnetic buzzer uses the principle of electromagnetic induction, and its oscillation frequency is relatively stable, without frequency errors caused by changes in environmental temperature, sound pressure, and other factors, thereby ensuring the accuracy of the alarm signal.

• 3. Work reliability
  

  The electromagnetic buzzer has a simple structure and no complex mechanical devices, so it has high reliability and can work continuously for a long time without performance degradation.

  
  

  4. Long service life

  The electromagnetic buzzer has a long service life because of its simple structure, no mechanical wear parts, and low oscillation frequency, which is not easy to cause material fatigue and other problems. Therefore, it can operate stably for a long time.

  
  

  5.  Wide applicability

  Electromagnetic buzzers can be applied in alarm systems, access control systems, fire protection systems, industrial assembly lines, and other fields, with broad application prospects.

  Electromagnetic buzzers have the advantages of high volume, good stability, reliable operation, long service life, and wide applicability, thus they have been widely used.

  
  

• Applications

  Due to its clear sound, beautiful sound quality, low power consumption, and long lifespan, electromagnetic buzzers are widely used in various fields, as shown below.

  1. Household appliances: Electromagnetic buzzers are commonly used in household appliances, such as televisions, air conditioners, washing machines, etc. They can be used to emit on/off alarm sounds, button sounds , alarms, etc.

  
  

  2. Cars: The electromagnetic buzzer in cars can be used to emit turn signals, brake signals, etc., as well as alarm sounds for doors not closing, engine malfunctions, etc.

  
  

  3. Security: Electromagnetic buzzers in the security field can be used for access control, turnstiles, alarm bells, anti-theft devices, etc.

  
  

  4. Industry: Electromagnetic buzzers are also widely used in the industrial field, such as machine equipment alarms, working status prompts, production plan prompts, etc.

  
  

  Electromagnetic buzzers are a reliable sound emitting component with characteristics such as clarity, elegance, low power consumption, and long lifespan. It has a wide range of applications in various fields.

  > White Goods

  > Alarm Clocks

  > Medical Devices

  > Smoke Alarms

  > Doorbells

  > Patient Oxygen Dispenser

  > Automotive Diagnostic Tools

  > Barcode Scanners

  > Fish Finders

  > Labeling Machines

  > Gas Pump Anti-Theft Devices

  > Automated Door Locks

• 

• Parameters

  The principle of an electromagnetic passive buzzer is an electro-acoustic device that converts electrical energy into vibration through electromagnetic effects. When a certain frequency of electrical signal passes through the internal coil of the buzzer, an alternating magnetic field is generated. After strengthening the magnetic field through the iron core bracket in the middle of the coil, the vibration of the vibration plate on the magnetic coil is pushed.

  
  

  The key parameters of a general electromagnetic passive buzzer include coil resistance, rated voltage, SPL value, consumed current, voltage operating range, etc.

  
  

  It is very important for users to match parameters during use. Here are some examples to illustrate how to achieve parameter matching:

  
  

  For example, choosing to use a buzzer like this: Firstly, we know that the rated voltage of this buzzer is 5Vo-p, the input frequency is 2000Hz, the DC resistance of the coil is 42 ohms, the SPL value used under rated conditions is at least 85dB, the testing distance is 10cm, the consumption current is not more than 70mA, and the voltage working range is 3-7V;

  
  

• FBelec is China leading factory of mechanical buzzer

  All of FBelec' products can meet ROHS and REACH, fast delivery, best service!
  It is a high-end professional buzzer enterprise integrating buzzer product R & D, design, production and product sales.

  Call Us Today

• 
  

  When using this buzzer, the circuit design must meet the following conditions:

  1. The optimal signal frequency for the input buzzer is 2000Hz, and the signal frequency output from the CPU I/O port is generally more accurate; But if you have a significant error in the frequency signal output from other sources, please pay attention to one principle. Firstly, the frequency error range of the output signal should be controlled within 100Hz as much as possible; Secondly, the frequency error design value should have an upper tolerance, which means that there should not be frequencies below 2000Hz. The design frequency can be increased from 2000Hz to 2100Hz, which basically does not affect normal use. When inputting frequencies below 2000Hz into the buzzer, some of the buzzers will become very quiet (this is caused by the normal error of the buzzer's starting point, which is inevitable). However, when inputting frequencies above 2000Hz, as the buzzer's starting point is not greater than 2000Hz, frequency signals exceeding the buzzer's starting point can make the buzzer vibrate, so there will be no small sound. However, when the frequency exceeds 2000Hz, the SPL value of some products will decrease slightly. (Generally within 5dB, the listening sensation is not too obvious); If your circuit cannot meet the above requirements, you must use a customized buzzer;

  
  

  2. The signal voltage of the input buzzer must be correct.

  
  

  3. The amplifier part that drives the buzzer to work requires the transistor to be saturated and conductive, meaning that the input signal of the amplifier must be sufficient to drive the transistor to be saturated and conductive. Usually, the value of resistance R1 in the circuit can be adjusted to meet this requirement;

  
  

  4. There is no special requirement to replace the resistance value of the resistor connected in series with the buzzer with 0 ohms. Some users must use a current limiting resistor for overall current limiting protection. It is also best to use a resistor with a resistance value below 42 ohms. After using a current limiting resistor, the SPL value of the buzzer will decrease slightly, and the value of the reduced sound usually does not exceed 5dB;

  
  

  5. The working voltage range is 3-7V. SPL values below 5V will be appropriately reduced, while SPL values above 5V will be appropriately increased. Users can test the actual SPL values during actual use. SPL values below 3V can also be used, but will decrease significantly.

  
  

• 

• The products are mainly used in medical equipment, automotive instruments, automotive electronics, security, laptops, computer motherboards, cordless phones, uninterruptible power supplies, alarms, digital cameras, Bluetooth earphones, GPS, and household appliances.

  
  

  The company's users include Sony, V-Tech, Intel, ASUS, APC, Whirlpool, Foxconn, Flextronic, Samsung, Pioneer, DELL, and more.

  
  

  Adhering to the business philosophy of "satisfying customers", the company attaches great importance to quality control and quality management. We have obtained ISO9001:2000, ISO14001:2004 system certification, and TS16949:2002 certificate. Quality first is the company's philosophy, and customer satisfaction is our pursuit. We are dedicated to providing high-quality products and services for domestic and foreign customers.

• 
  

  Magnetic sound transducers uses the electromagnetic induction phenomenon to make sound for the electromagnet formed after the voice coil is connected with the alternating current to attract or repel the permanent magnet to push the diaphragm. The direct current can only continuously push the diaphragm without producing sound, and can only produce sound when connected or disconnected.

  
  

  The working principle of passive buzzer is the same as that of loudspeaker.

  
  

  When using square wave signal source to drive, a diode shall be connected in reverse parallel to prevent the high-voltage reverse electromotive force generated in case of sudden power failure from penetrating other components and shortening service life.

  
  

  Active buzzers are often more expensive than passive ones, because there are multiple oscillation circuits in them. They only need to be connected to the DC of rated voltage to send out the sound of specified frequency. The frequency is determined by the internal oscillation circuit and cannot be changed.

  
  

  Fbelec's PCB magnetic transducers adopts reliable components and has more stable performance. At the same time, the factory has introduced advanced automatic production line to reduce the cost! FBelec brand products sell well in Poland, Czech Republic and other European countries

  In the part number of FBMT1290, "FB" means" FBelec","MT" means magnetic transducer,"12" means diameter is 12mm,"90“means the height is 9.0mm.