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| Part Number | WM-54BT | WM-60AY | WM-55A103 | WM-034CY | WM-56A103 |
| Manufacturer | Panasonic Electronic Components | Panasonic Electronic Components | Panasonic Electronic Components | Panasonic Electronic Components | Panasonic Electronic Components |
| Series | WM-54B | WM-60A | WM-55A103 | WM-034C | WM-56A103 |
| Packaging | Bulk | Bulk | Bulk | Bulk | Bulk |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Type | Electret Condenser | Electret Condenser | Electret Condenser | Electret Condenser | Electret Condenser |
| Output Type | Analog | Analog | Analog | Analog | Analog |
| Direction | Omnidirectional | Omnidirectional | Unidirectional | Omnidirectional | Unidirectional |
| Frequency Range | 20 Hz ~ 16 kHz | 20 Hz ~ 20 kHz | 100 Hz ~ 12 kHz | 20 Hz ~ 16 kHz | 100 Hz ~ 16 kHz |
| Sensitivity | -44dB ±3dB @ 94dB SPL | -42dB ±3dB | -47dB ±4dB @ 94dB SPL | -42dB ±3dB | -47dB ±4dB @ 94dB SPL |
| S/N Ratio | 60dB | 58dB | 60dB | 60dB | 60dB |
| Impedance | 2.2 kOhms | 2.2 kOhms | 680 Ohms | 2.2 kOhms | 680 Ohms |
| Voltage - Rated | 2.5 V | 2 V | 1.5 V | 4.5 V | 1.5 V |
| Voltage Range | 2.5 V ~ 10 V | 2 V ~ 10 V | 1.5 V ~ 10 V | 4.5 V ~ 10 V | 1.5 V ~ 10 V |
| Current - Supply | 600 µA | 500 µA | 500 µA | 800 µA | 500 µA |
| Port Location | Top | Top | Top | Top | Top |
| Ratings | - | - | - | - | - |
| Termination | PC Pins | Solder Pads | Solder Pads | Solder Pads | Solder Pads |
| Size / Dimension | 0.382" Dia (9.70mm) | 0.236" Dia (6.00mm) | 0.382" Dia (9.70mm) | 0.382" Dia (9.70mm) | 0.382" Dia (9.70mm) |
| Height (Max) | 0.177" (4.50mm) | 0.197" (5.00mm) | 0.197" (5.00mm) | 0.264" (6.70mm) | 0.197" (5.00mm) |
| Shape | Circular | Circular | Circular | Circular | Circular |
| Grade | - | - | - | - | - |
| Qualification | - | - | - | - | - |
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