Murata manufacture a wide range of sounder and buzzer components based on Piezoelectric ceramic technology, the range includes surface mount and through hole housed sounders and Piezoelectric diaphragms elements which can be integrated into the users product housing design. Murata sound components can be used to provide important feedback or warnings to the operator in addition to being widely used in melody and audio speaker applications.
Structure of a Piezoelectric sounder
Murata sounders use the Piezoelectric effect of ceramic to generate sound, the ceramic material is affixed to a metal plate/diaphragm and when an alternating voltage is applied to the ceramic material it deflects causing the metal diaphragm to bend back and forth creating a movement of air thus generating sound. Piezoelectric ceramic sounders use far less component parts than traditional electromagnetic type sounders making them more reliable and lighter weight.
The use of Piezoelectric ceramic technology allows Murata’s sounder products to be smaller size and lower profile occupying less PCB space, they feature low current consumption making them ideal for use in battery powered products such as IoT devices and portable equipment. They feature high sound pressure levels allowing them to be used in a wide range of environments and are easy to assemble using automatic soldering processes. The performance of the sounders is stable even after soldering to the PCB making them suitable for applications which require a high degree of reliability.
Murata's range of sounders are available as external drive types where the users oscillation circuit provides a suitable waveform to drive the sounder or with a built-in oscillation circuit where just a simple DC voltage is required to operate the sounder.
SMD Sounders
The Murata PKLCS and PKMCS series of SMD Piezoelectric sounders are recommended for new designs and are very popular as replacements for existing through hole electromagnetic sounder products where customers are looking to reduce PCB size, streamline production assembly and improve reliability.
The SMD range is available in 3 sizes, 9.0x9.0x1.9mm, 12.0x12.0x3.0mm and 18.0x18.0x8.0mm and includes models which are suitable for automotive applications. Sound output levels are specified from 76dB (typ.) up to 100dB (typ.) measured at 10 cm distance with available frequencies of 2.0kHz, 2.4 Hz and 4.0kHz making them suitable for use in a wide range of different environments.
Through Hole Sounders and Buzzers
Murata’s PKM and PKB series of through hole Piezoelectric Sounders and Buzzers are sound components which incorporate a Piezoelectric vibration plate in a plastic housing. The Piezoelectric sounders are sound components without built-in oscillation circuits which can generate sounds when a suitable input signal is applied, they are capable of creating single tone, multi-tone and melody sounds depending on the oscillation circuit allowing them to be used in a wide range of applications. The Piezoelectric buzzer range has a built-in oscillation circuit and generates a monotone sound when a DC voltage is applied to the pins.
Sound output levels are specified for the PKM series Piezoelectric Sounders from 78dB (typ.) up to 92dB (typ.) measured at 10 cm distance with available frequencies of 2.0kHz and 4.0kHz making them suitable for use in a wide range of different environments. The PKB series Piezoelectric buzzer part gives a single tone sound output level of 90dB at 3.6kHz frequency with current consumption of just 16mA (max.)
Piezoelectric Diaphragms
The Murata Piezoelectric Diaphragms require an external oscillation circuit to operate and are available in two types, the 7BB series which have a Brass material metal plate and are available in 12mm to 41mm diameters and the 7NB series which uses a Nickel alloy metal plate and is available in 31mm diameter only. Several models in the 7BB series can also be supplied with 50mm lead-wires attached. The Piezoelectric Diaphragms are available with resonant frequencies from 1.3kHz to 9.0kHz making them suitable for use in a wide range of noisy environments where a warning signal needs to be clearly heard.
Key features
Click here for more information or to buy from Anglia Live.
Click here to download the Murata Piezoelectric Sound Components Brochure
Anglia are offering customers FREE samples of the Piezoelectric Sound Components from Murata, please fill in the form below to register for your FREE samples now.
Free samples are subject to availability.
The BAC05 series from Murata offers a rugged design, efficient and flexible family of AC/DC converters suitable for a wide range of applications including industrial, medical, building automation and IoT devices.
Murata have introduced the NFG0QHB series of common mode noise filters, designed for high-speed differential interfaces such as those used on USB and HDMI interfaces.
Murata have extended their range of Lithium Coin cells to include High Drain and Extended Temperature types to meet the demanding requirements of next generation IoT devices.
Murata's range AMR sensors are magnetic switches that have an integrated IC that produces high and low output digital signals based on the magnetic field strength detected.
The LXRW series from Murata are innovative variable capacitors which allow their capacitance value to be varied by applying a voltage, the capacitance varies proportional to the voltage applied making them ideal for use in frequency tuning circuits.