Buzzer
Thehe generic term for electro-acoustic components is called Buzzer. In general, electronic circuit designers are looking for the following features:

  • Smallest size possible
  • Highest Sound Pressure Level (SPL)
  • Stable and robust housing
Series   Specifications  
B = Buzzer
M = Magnetic Diameter and voltage P = Pin
P = Piezo W = Wire
O= Mechanic S = SMD
E = External
I = Internal

Our range of Buzzer

ELECTRO MAGNETIC BUZZER

    The working principle of the magnetic buzzer is very similar to the loudspeaker system:
  • By driving the coil with a voltage a magnetic field emerges
  • By applying an AC-voltage the magnetic field will change according to the frequency
  • A permanent magnet is fixed on top of the center of a metal membrane. Due to the reversing of the magnetic field, the membrane will move in a pull-/push- manner according to the frequency
  • The moving membrane will generate the sound

Our range of Electro - Magnetic Buzzer

Internal Drive BuzzerExternal Drive BuzzerSMD Buzzer

Our range of Internal Drive Electro-Magnetic Buzzer

Internal driven buzzer have an inbuilt circuitry which defines the characteristics of the sound "Self-Drive"

Click on product part for data sheet of our INTERNAL DRIVE ELECTO-MAGNETIC BUZZER Close
  BMI 1606P WL A >> BMI 1212P-02 WL A >> BMI 1205P A >> BMI 1212P-01 A >>
Operating temperature -30°C to 85°C -40°C to 85°C -20°C to 70°C -40°C to 85°C
Storage temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C
Contact Pin Pin Pin Pin
Weight [g] 7 2 2 2
SPL [dBA] ≥ 85 ≥ 83 ≥ 88 ≥ 88
Resonant frequency [Hz] 2300 2300 ± 400 2300 ± 300 2300 ± 300
Rated voltage [V] 6 12 5 12
Operating voltage [V] 4-8 9-18 4-6,5 8-16
Current consumption [mA] ≤ 30 ≤ 30 ≤ 30 ≤ 30
  BMI 1203P WL A >> BMI 1206P WL A >>
Operating temperature -20°C to 75°C -20°C to 75°C
Storage temperature -25°C to 85°C -25°C to 85°C
Contact Pin Pin
Weight [g] 2 2
SPL [dBA] ≥ 82 ≥ 83
Resonant frequency [Hz] 2300 ±400 2300 ±400
Rated voltage [V] 3 5
Operating voltage [V] 2-5 3-7
Current consumption [mA] ≤ 30 ≤ 30
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Our range of External Drive Electro-Magnetic Buzzer

External driven buzzer need an external electronic oscillator circuit in order to operate. So the developer can define frequency and SPL according to their individual requirements.

Click on product part for data sheet of our EXTERNAL DRIVE ELECTO-MAGNETIC BUZZER Close
  BME 3212C-01 C >> BME 2512P-01 A >> BME 1612P-07 A >> BME 1612P-05 D >>
Operating temperature -40°C to 85°C -40°C to 85°C -40°C to 100°C -40°C to 100°C
Storage temperature -40°C to 105°C -40°C to 85°C -40°C to 100°C -40°C to 100°C
Contact Pin Pin Pin Pin
Weight [g] 10 8,5 7 7
DC resistance [Ω] 120 ±12 110 ±16 115 ±15 115 ±15
impendance [Ω] 155 ± 20% 140 ± 28 200 200
SPL [dBA] 90 ± 3 see datasheet see datasheet 98 ± 3
resonant frequency [Hz] 740 740 2048 2048
rated voltage [V] 12 12 12 12
operating voltage [V] 8-16 8-16 6-18 6-18
current consumption [mA] ≤ 55 ≤ 40 ≤ 40
  BME 1612P-04 B >> BME 1606P-02 C >> BME 1606P-01 F >> BME 1205P-03 A >>
Operating temperature -40°C to 100°C -40°C to 105°C -40°C to 105°C -20°C to 70°C
Storage temperature -40°C to 100°C -40°C to 105°C -40°C to 105°C -30°C to 80°C
Contact Pin Pin Pin Pin
Weight [g] 7 7 7 2
DC resistance [Ω] 115 ±15 110 110 140
impendance [Ω] 200 45 ±7 45 ±7 50 ±7,5
SPL [dBA] 89 ± 3 ≥ 88 ≥ 88 ≥ 85
resonant frequency [Hz] 2048 2048 2048 2048
rated voltage [V] 12 6 6 5
operating voltage [V] 6-18 4-8 4-8 1-7
current consumption [mA] ≤ 40 ≤ 40 ≤ 40 ≤ 40
  BME 1205P A >> BME 1212PX WL A >> BME 1201P A >> BME 1612P WL A >>
Operating temperature -20°C to 70°C -40°C to 85°C -20°C to 70°C -40°C to 100°C
Storage temperature -30°C to 80°C -40°C to 85°C -30°C to 80°C -40°C to 100°C
Contact Pin Pin Pin Pin
Weight [g] 2 2 2 7
DC resistance [Ω] 140 240 120 200
impendance [Ω] 50 ±7,5 140 ± 12 42 ±6 115 ±15
SPL [dBA] ≥ 85 ≥ 85 ≥ 80 > 85
resonant frequency [Hz] 2048 2400 ± 200 2048 2048
rated voltage [V] 5 12 1.5 12
operating voltage [V] 1-7 7-16 1-2 6-18
current consumption [mA] ≤ 40 ≤ 40 ≤ 10 ≤ 40
  BME 1606P A >>
Operating temperature -40°C to 100°C
Storage temperature -40°C to 100°C
Contact Pin
Weight [g] 7
DC resistance [Ω] 110
impendance [Ω] 45 ±7
SPL [dBA] ≥ 85
resonant frequency [Hz] 2048
rated voltage [V] 6
operating voltage [V] 3-12
current consumption [mA] ≤ 40
Close

Our range of SMD Electro-Magnetic Buzzers

Surface Mount Technology (SMT) devices

Click on product part for data sheet of our SMD ELECTO-MAGNETIC BUZZER Close
  BMI 1305S WL A >> BME 8504S-03 A >> BME 8504S-02 A >> BME 8503S-01 A >>
Operating temperature -20°C to 70°C -40°C to 85°C -40°C to 85°C -40°C to 85°C
Storage temperature -30°C to 80°C /td> -40°C to 85°C -40°C to 85°C -40°C to 85°C
Contact SMD SMD SMD SMD
Weight [g] 2 1 1 1
DC resistance [Ω] 15 ±3 15 ±3 18 ±3
impendance [Ω]
SPL [dBA] ≥ 85 ≥ 87 ≥ 87 ≥ 85
resonant frequency [Hz] 2300 ± 300 2730 2731 2730
rated voltage [V] 5 3.6 3.6 3
operating voltage [V] 4-7 2-4 2-4 2-5
current consumption [mA] ≤ 30 ≤ 100 ≤ 100 ≤ 80
  BME 1403S A >> BME 1312S-02 A >> BME 1312S-01 A >> BME 1312S B >>
Operating temperature -40°C to 85°C -30°C to 105°C -40°C to 85°C -40°C to 85°C
Storage temperature -40°C to 85°C -30°C to 105°C -40°C to 90°C -40°C to 105°C
Contact SMD SMD SMD SMD
Weight [g] 1.2 2 2 2
DC resistance [Ω] 18 ±3 19 ±2 120 ±12
impendance [Ω] 240
SPL [dBA] ≥ 87 > 85 ≥ 90 min. 90
resonant frequency [Hz] 3200 2400 2400 2400
rated voltage [V] 3 12 12 12
operating voltage [V] 2-4,5 8-16 8-16 8-18
current consumption [mA] ≤ 70 ≤ 40 ≤ 40 max. 40
  BME 1305S-01 A >> BME 1205S-02 A >> BME 0603S B >> BME 8504S A >>
Operating temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -30°C to 70°C
Storage temperature -40°C to 85°C -40°C to 90°C -40°C to 85°C -40°C to 85°C
Contact SMD SMD SMD SMD
Weight [g] 2 2 0.6 0.42
DC resistance [Ω] 45 ± 5 45 ± 5 10 ±1,5 15 ±3
impendance [Ω] 80 80
SPL [dBA] ≥ 85 90-98 min. 80 ≥ 85
resonant frequency [Hz] 2400 2400 3100 2700
rated voltage [V] 5 5 3 3.6
operating voltage [V] 4-7 4-7 2,5-4,5 2,5-4,5
current consumption [mA] ≤ 40 ≤ 40 max. 120 ≤ 90
  BME 8505S A >> BME 0903S A >> BME 0905S A >> BMI 1012S A >>
Operating temperature -40°C to 85°C -40°C to 105°C -20°C to 60°C -30°C to 85°C
Storage temperature -40°C to 85°C -40°C to 105°C -30°C to 70°C -40°C to 90°C
Contact SMD SMD SMD SMD
Weight [g] 0.6 0.7 0.6 1
DC resistance [Ω] 32±5 16 ±3 30 ±3
impendance [Ω]
SPL [dBA] ≥ 87 ≥ 80 ≥ 85 ≥ 90
resonant frequency [Hz] 2730 2731 2730 2400 ±300
rated voltage [V] 5 3.6 5 12
operating voltage [V] 4-7 3-5 4-6 8-14
current consumption [mA] ≤ 70 ≤ 100 ≤ 80 ≤ 30
Close
Sound Information
1. How can the volume be adjusted ?
CloseThere are different ways to adjust the volume. One way of doing this is to modify the operating voltage. However the volume is not modified in a linear way and can only be adjusted to a certain degree. Another widely used method is presented by the so called pulse- width modulation or PWM. In the process the pulse/pause ratio (or on/off ratio) of the trigger signal is modified and associated therewith the spectrum of the trigger signal is also fundamentally being changed. While the fundamental frequency is always retained the harmonic partials though are changed. Harmonics contribute to total energy deliverance and therefore in part determine the volume level. The acoustical behaviour of magnetic signal devices is linear only in a very restricted range, so when employing PWM the volume setting is thus linear only to a limited extent.
2. How does a magnetic signaling device behave outside of the resonance frequency ?
Close A magnetic signaling device can be operated outside of the resonance but then the maximum volume cannot be attained. Due to a relatively flat curve outside of the resonance, frequency variations of the trigger signal in this area cause only minor volume fluctuation.
3. When is a flyback diode (aka free-wheeling diode, suppressor diode, clamp diode) required ?
Close The flyback diode is used anti-parallel to magnetic buzzers. Magnetic signal generators are constructed with a fixed coil that creates a changing magnetic field when an alternating voltage is applied thus causing the metal diaphragm to oscillate. The instance when the diaphragm reverts to its original position it in turn generates a magnetic impulse that produces a reverse voltage. Due to the relatively high inductivity this induced voltage can be so great that it could cause the connected circuit to be destroyed. With the aid of a flyback diode this undesired interference voltage is short-circuited and thus rendered harmless.
4. Do I have to pay attention to proper polarity ? What happens in event of reverse connection ?
Close You have to pay attention to proper polarity both with loudspeakers and magnetic signaling devices, when the components are operated with an asymmetrical square wave voltage. If the components are run reverse connected this will result in a decrease in volume and over-loading up to destruction.

PIEZO BUZZER

Piezo buzzers use piezo ceramic plates in order to generate sound. The piezoceramic effect was discovered by Jacques and Pierre Curie. This effect changes the diameter of the ceramic disc when a DC voltage is applied. Used as a sound element, the ceramic disc is glued on a metal disc with a larger diameter. According to the polarity and the intensity of the driving voltage the whole system will flex and thus generate the sound.

Our range of Piezo Buzzer

PIEZO BUZZERSMD Buzzer
Click on product part for data sheet of our PIEZO BUZZER Close
  BPI 2612P-08 A >> BPI 2612P-06 A >> BPI 1412PWL A >> BPE 3009P-01 A >>
Operating temperature -30°C to 85°C -20°C to 85°C -20°C to 70°C -40°C to 85°C
Storage temperature -30°C to 85°C -20°C to 85°C -20°C to 70°C -40°C to 85°C
Contact Faston Faston PIN PIN
Weight [g] 20 20 1 5
SPL [dBA] ≥ 92 ≥ 103 85 ≥ 90
Resonant frequency [Hz] 3300 ±500 3300 ±500 4000 ±500 2500
Rated voltage [V] 24 24 12 9
Operating voltage [V] 9-30 9-30 3-16 1-30
Current consumption [mA] ≤ 70 ≤ 70 ≤ 10 ≤ 5
Tone Pulse Pulse Constant
Close
Click on product part for data sheet of our SMD Piezo Close
  BPE 1605S A >> BPE 1603S A >> BPE 1305S-02 A >> BPE 1105S A >>
Operating temperature -40°C to 120°C -25°C to 70°C -40°C to 105°C -20°C to 70°C
Storage temperature -40°C to 120°C -40°C to 85°C -40°C to 105°C -30°C to 80°C
Contact SMD SMD SMD SMD
Weight [g] 1 1.2 0.5 1.6
SPL [dBA] ≥ 70 75 ≥ 75 70
resonant frequency [Hz] 4000 4000 4100 ±500 4100 ±500
rated voltage [V] 5 3 5 5
operating voltage [V] 1-25 1-25 1-25 1-25
current consumption [mA] ≤ 3 ≤ 5 ≤ 5 ≤ 1
  BPE 1203S-05 A >> BPE 1203S-06 A >>
Operating temperature -40°C to 85°C -40°C to 85°C
Storage temperature -40°C to 85°C -40°C to 85°C
Contact SMD SMD
Weight [g] 0.35 0.35
SPL [dBA] min. 70 min. 75
resonant frequency [Hz] 2000 4000
rated voltage [V] 3 3
operating voltage [V] 1-25 1-25
current consumption [mA] max. 1 max. 1
Close
Sound Information
1. How does the piezoelectric effect work ? and what do you have to take into consideration in regards to it ?
CloseThe piezoelectric effect is understood as the change in the polarization and therefore the occurrence of electric charge in solid materials when mechanical stress is applied to them. The direct piezoelectric effect is defined by the application of a mechanical force that creates an electric charge on the piezo element. Piezo scales are based on this principle among others.

When the inverse piezoelectric effect is applied, the solid material is deformed by inducing an electric charge. Among others, piezo buzzers are based on this principle. By applying voltage to it, the piezo disk is being deformed to one side. If polarity is reversed, the piezo disk will be deformed to the other side. If the voltage change is conducted in an audible frequency range, a mechanical oscillation or vibration is created that is perceived as sound. The maximum vibration depends on the mechanical properties of the piezo disk and determines the resonance frequency.

When a piezo disk is used, the maximum amplitude in the range of the resonance frequency can be reached.

Due to mechanical conditions piezo buzzers are generally employed at higher frequency ranges. On the whole piezo buzzers also have a flatter design than magnetic buzzers.
2. What is the purpose of the feedback electrode and how do I take advantage of it ?
Close Buzzers with a feedback electrode are usually employed as frequency-determining components in Colpitts oscillators. Colpitts oscillators operate with two capacitances. By employing the feedback electrode in practice two capacitances of the buzzer are being utilized. When used properly, the feedback electrode ensures that production-related tolerances in the resonance frequency are optimally reduced and the maximum sound pressure levels are achieved.
3. How does the acoustical behaviour of a piezo signal generator change under temperature ?
Close The resonance frequency shifts as the temperature rises. When operated without the use of a flyback diode, this causes the sound pressure level at a constant driver frequency to drop. So as a rule data sheet specifications apply to room temperatures. For especially high requirements in applications in varying climate conditions it should be checked what provisions will get the desired result.

FRONT PANEL BUZZER

FRONT PANEL BUZZER
There is no specific sound technology related to front panel buzzers. Basically all technologies described above can be used. In most cases a piezo disc will be the sound element. The extra category has been chosen because of the very specific housing for panel mounting..
Click on product part for data sheet of our FRONT PANEL BUZZER Close
  HB 50C-01 B >> HB 4112P A >> HB 28CP100 A >> HB 28CP-01 A >>
Operating temperature -20°C to 70°C -30°C to 60°C -20°C to 75°C -20°C to 75°C
Storage temperature -20°C to 70°C -40°C to 75°C -25°C to 85°C -25°C to 85°C
Contact Terminal Terminal Terminal Terminal
Weight [g] 50 14 40 40
SPL [dBA] 95 ±3 68-80 ±3 95 ±3 85 ±3
Resonant frequency [Hz] 3000 ±500 2900 ±500 2900 ±500 2900 ±500
Rated voltage [V] 36 12 12 12
Operating voltage [V] 2-50 8-31 5-28 5-28
Current consumption [mA] ≤ 20 3-41 ≤ 20 ≤ 20
Tone Constant Constant/Pulse Constant/Pulse Constant/Pulse
  HB 28CP-03 A >> HB 28CP A >> HB 28C-01 B >> HB 228CP A >>
Operating temperature -20°C to 75°C -20°C to 75°C -40°C to 105°C -20°C to 65°C
Storage temperature -25°C to 85°C -25°C to 85°C -40°C to 105°C -30°C to 75°C
Contact Terminal Terminal Terminal Faston
Weight [g] 40 40 40 25
SPL [dBA] 65 ±3 85 ±3 85 ±3 85 ±3
Resonant frequency [Hz] 2900 ±500 2900 ±500 2900 ±500 3000 ±500
Rated voltage [V] 12 12 12 12
Operating voltage [V] 5-28 5-28 5-28 5-28
Current consumption [mA] ≤ 20 max. 20 ≤ 20 ≤ 18
Tone Constant/Pulse Constant/Pulse Constant Constant/Pulse
  HB 228C-01 A >> HB 110C A >>
Operating temperature -20°C to 65°C -25°C to 70°C
Storage temperature -30°C to 75°C -25°C to 80°C
Contact Faston Terminal
Weight [g] 40 40
SPL [dBA] 85 ±3 >82
Resonant frequency [Hz] 3000 ±500 3000 ±500
Rated voltage [V] 12 110
Operating voltage [V] 5-28 88-132
Current consumption [mA] ≤ 18 ≤ 6,5
Tone Constant Constant
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