Datasheet

2/7
MURATA MANUFACTURING Co., LTD.
Specification of Ultrasonic Transducer
Type : MA40MF14-0B
1. Scope
This product specification is applied to the water proof type ultrasonic transducer used for
obstacle detection system around vehicle.
Please contact us when using this product for any other applications than described in the
above.
2. Customer Part Number
3. Murata Part Number
MA40MF14-0B
4. Dimension
as per Fig.1
5. Absolute Maximum Ratings
Items Specification Note
5-1 Maximum Input Voltage 160Vp-p Do not apply D.C. voltage.
5-2 Operating temperature range -40 to +85 deg C
5-3 Storage temperature range -40 to +85 deg C
6. Specifications (* Temperature 25±3 deg C, 45 to 60 % R.H, unless otherwise noted ）
Items Specification Note
6-1 Operation Frequency 40 kHz
6-2 Sound pressure Level more than 101 dB
at 40kHz
distance is 30cm, input voltage is 10Vrms
0 dB = 20 uPa
(per measuring circuit Fig.2)
6-3 Sensitivity more than –87 dB
at 40 kHz
0 dB = 10V/Pa
(per measuring circuit Fig.3)
6-4 Beam pattern (Typical) (Typical)
110 deg x 50 deg
6dB down angle of overall sensitivity
6-5 Capacitance 2700 pF +/- 20% at 1kHz
6-6 Insulation Resistance 100 Mohm min. at 100V D.C.