7BB-12-9 Murata, 7BB-12-9 Datasheet - Page 8

• Manufacturer Part Number: 7BB-12-9
• Description: Speakers & Transducers ACOUSTIC ELEMENT
• Manufacturer: Murata
• Series: 7BBr

Specifications of 7BB-12-9

• Magnet Material: Brass
• Diameter: 12 mm
• Frequency Range: 9 KHz
• Impedance: 1000 Ohms
• Capacitance: 8nF
• External Diameter: 12mm
• Resonant Frequency: 9kHz
• Transducer Function: Diaphragm
• Length/height, External: 0.1mm
• Outer Diameter: 12mm
• Sensor Operating Frequency: 8kHz To 10kHz
• Rohs Compliant: Yes
• Operating Temperature Max: 70°C
• Operating Temperature Min: -20°C
• Operating Frequency Range: 8kHz To 10kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Please read CAUTION and Notice in this catalog for safety. This catalog has only typical specifications. Therefore you are requested
to approve our product specification or to transact the approval sheet for product specification, before your ordering.
• Sound diaphragm without feedback electrode also have the same node diameters.
Self Drive Type
Part Number
7BB-20-6C
7BB-20-6CA0 6.3 0.6kHz 800 max.
7BB-27-3C
7BB-27-4C
7BB-27-4CA0 4.6 0.5kHz 350 max.
7BB-35-3C
7BB-35-3CA0 2.8 0.5kHz 200 max.
7BB-41-2C
7BB-41-2CA0 2.2 0.3kHz 350 max.
7NB-27-2C
7NB-27-3C
7NB-27-4C
7SB-34R7-3C 3.1 0.3kHz 150 max.
Node Diameter
Part Number
7BB-20-6C
7BB-27-4C
7BB-35-3C
7BB-41-2C
6.3 0.6kHz 500 max.
3.0 0.5kHz 300 max.
4.6 0.5kHz 200 max.
2.8 0.5kHz 200 max.
2.2 0.3kHz 250 max.
2.2 0.5kHz 300 max.
3.0 0.5kHz 300 max.
3.8 0.5kHz 300 max.
Frequency
Resonant
(kHz)
D
Impedance
T
a
Resonant
(ohm)
b
t
Capacitance
Node Diameter (mm)
8.5 30%
8.5 30%
35 30%
18 30%
18 30%
26 30%
26 30%
24 30%
24 30%
37 30%
24 30%
19 30%
24 30%
[120Hz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
(nF)
13.5
17.5
22.5
26.5
dia D (mm)
Plate Size
(dia)
20.0
20.0
27.0
27.0
27.0
35.0
35.0
41.0
41.0
27.0
27.0
27.0
34.7
Red
Blue
Black
Element Size
a (mm)
(dia)
14.0
14.0
19.7
19.7
19.7
25.0
25.0
25.0
25.0
19.7
19.7
19.7
25.0
Electrode Size
b (mm)
(dia)
12.8
12.8
18.2
18.2
18.2
23.0
23.0
23.0
23.0
18.2
18.2
18.2
23.4
Thickness
T (mm)
0.42
0.42
0.27
0.54
0.54
0.53
0.53
0.63
0.63
0.22
0.32
0.42
0.50
Plate Thickness
t (mm)
0.20
0.20
0.15
0.30
0.30
0.30
0.30
0.40
0.40
0.10
0.15
0.20
0.25
(with Lead Wire)
(with Lead Wire)
(with Lead Wire)
(with Lead Wire)
Iron Nickel Alloy
Iron Nickel Alloy
Iron Nickel Alloy
Plate Material
P37E17.pdf 02.3.6
Stainless
Brass
Brass
Brass
Brass
Brass
Brass
Brass
Brass
Brass
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