7BB-27-4 Murata, 7BB-27-4 Datasheet - Page 8

• Manufacturer Part Number: 7BB-27-4
• Description: Speakers & Transducers 4.6KHZ PIEZO ELEMENT
• Manufacturer: Murata
• Series: 7BBr

Specifications of 7BB-27-4

• Magnet Material: Brass
• Dimensions: 0.3 mm D
• Diameter: 27 mm
• Depth: 0.3 mm
• Frequency Range: 4.6 KHz
• Impedance: 200 Ohms
• Shape: Round
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1
!Note
• This PDF catalog is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our
• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
sales representatives or product engineers before ordering.
!Note
• Sound diaphragms without feedback electrode also have the same node diameters.
6
Self Drive Type
Part Number
7BB-20-6C
7BB-20-6CL0 6.3 0.6kHz 800 max.
7BB-27-4C
7BB-27-4CL0 4.6 0.5kHz 350 max.
7BB-35-3C
7BB-35-3CL0 2.8 0.5kHz 200 max.
7BB-41-2C
7BB-41-2CL0 2.2 0.3kHz 350 max.
7SB-34R7-3C 3.1 0.3kHz 150 max.
Node Diameter
• Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
Part Number
7BB-20-6C
7BB-27-4C
7BB-35-3C
7BB-41-2C
6.3 0.6kHz 500 max.
4.6 0.5kHz 200 max.
2.8 0.5kHz 200 max.
2.2 0.3kHz 250 max.
Frequency
Resonant
(kHz)
øD øa
Impedance
T
Resonant
(ohm)
øb
t
Capacitance
Node Diameter (mm)
18.0 30%
18.0 30%
26.0 30%
26.0 30%
24.0 30%
24.0 30%
24.0 30%
8.5 30%
8.5 30%
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
[1kHz]
(nF)
13.5
17.5
22.5
26.5
Plate Size
dia. D
(mm)
20.0
20.0
27.0
27.0
35.0
35.0
41.0
41.0
34.7
Red
Blue
Black
Element Size
dia. a
(mm)
14.0
14.0
19.7
19.7
25.0
25.0
25.0
25.0
25.0
Electrode Size
dia. b
(mm)
12.8
12.8
18.2
18.2
23.0
23.0
23.0
23.0
23.4
Thickness
(mm)
0.42
0.42
0.54
0.54
0.53
0.53
0.63
0.63
0.50
T
Plate Thickness
(mm)
0.20
0.20
0.30
0.30
0.30
0.30
0.40
0.40
0.25
t
AWG32 Length 50mm)
AWG32 Length 50mm)
AWG32 Length 50mm)
AWG32 Length 50mm)
(with Lead Wire:
(with Lead Wire:
(with Lead Wire:
(with Lead Wire:
Plate Material
Stainless
Brass
Brass
Brass
Brass
Brass
Brass
Brass
Brass
P37E.pdf
10.1.28