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| Part Number | NR-23160-000 | NR-25994-C97 | NR-25994-000 | NR-23159-000 | NR-23158-000 |
| Manufacturer | Knowles | Knowles | Knowles | Knowles | Knowles |
| Series | NR | * | NR | * | NR |
| Packaging | Bulk | Bulk | Bulk | Bulk | Bulk |
| Product Status | Active | Obsolete | Obsolete | Obsolete | Obsolete |
| Type | Electret Condenser | - | Electret Condenser | - | Electret Condenser |
| Output Type | Analog | - | Analog | - | Analog |
| Direction | Noise Cancelling | - | Noise Cancelling | - | Noise Cancelling |
| Frequency Range | 100 Hz ~ 4 kHz | - | 100 Hz ~ 4 kHz | - | 100 Hz ~ 4 kHz |
| Sensitivity | -52dB ±3dB @ 74dB SPL | - | -49dB ±3dB @ 74dB SPL | - | -49dB ±3dB @ 74dB SPL |
| S/N Ratio | - | - | - | - | - |
| Impedance | 2.5 kOhms | - | 4.4 kOhms | - | 4.4 kOhms |
| Voltage - Rated | 1.3 V | - | 1.3 V | - | 1.3 V |
| Voltage Range | 1.3 V ~ 10 V | - | 1.3 V ~ 10 V | - | 1.3 V ~ 10 V |
| Current - Supply | 200 µA | - | 50 µA | - | 50 µA |
| Port Location | Top | - | Bottom, Top | - | Bottom, Top |
| Ratings | - | - | - | - | - |
| Termination | Solder Pads | - | Solder Pads | - | Solder Pads |
| Size / Dimension | 0.219" L x 0.157" W (5.56mm x 3.99mm) | - | 0.219" L x 0.157" W (5.56mm x 3.99mm) | - | 0.219" L x 0.157" W (5.56mm x 3.99mm) |
| Height (Max) | 0.089" (2.26mm) | - | 0.089" (2.26mm) | - | 0.089" (2.26mm) |
| Shape | Rectangular | - | Rectangular | - | Rectangular |
| Grade | - | - | - | - | - |
| Qualification | - | - | - | - | - |
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