Murata introduces Piezo Vibe for wearable device

  • Micro Mechatronics


This product has been discontinued.


Murata Manufacturing Co., Ltd. has announced the PJFV series of low power consumption (6 mW, A3 VDC) miniature (10.5mm × 3.8 mm × 2mm) vibrators employing piezoelectric ceramics. Samples will be progressively made available commencing February, and mass production will commence in April.


Along with the recent health boom, a pedometer has evolved into a device that monitors the state of health of the wearer as an amount of activity, and a watch has evolved into a smart watch which permits speech and also sending and receiving of e-mails using a cellphone or a smartphone. In this way, so-called wearable devices which are like small computers worn by users have been commercialized. In order to realize the notification and announcement functions of these devices, models that use vibration in addition to light and sound are coming into increasing use. The components are required to be designed not only to realize miniaturization of the device, but also to contribute to long battery life.


  • Low power consumption 6mW (about 200 mW for a general ERM)
  • Small size 10.5mm ×3.8mm × 2mm (4mm thickness for a general ERM)
  • Flat package There are no moving parts on the outside. (This enables the case to be located near the package.)
    *ERM=Eccentric rotation motor

Part number

Electric characteristic

Item Specification
Vibration quantity
(driven by 3V, at resonant frequency)
1.2G min.(@20g)
Vibration frequency 240Hz ± 35Hz
Rated working voltage 3V
Current consumption 2mA rms.

External size


Mass Production is scheduled to commence April 2017.


Vibrator for providing notification and announcements to a wearable device

Murata in Brief

Murata Manufacturing Co., Ltd. is a worldwide leader in the design, manufacture and sale of ceramic-based passive electronic components & solutions, communication modules and power supply modules. Murata is committed to the development of advanced electronic materials and leading edge, multi-functional, high-density modules. The company has employees and manufacturing facilities throughout the world. For more information, visit Murata's website at