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| Part Number | EFB-RL37C20 | 
| Datasheet | EFB-RL37C20 datasheet | 
| Description | AUDIO PIEZO TRANSDUCER TH | 
| Manufacturer | Panasonic Electronic Components | 
| Series | EFB | 
| Part Status | Obsolete | 
| Driver Circuitry | Transducer, Externally Driven | 
| Input Type | DC | 
| Voltage - Rated | 12V | 
| Voltage Range | - | 
| Frequency | 3.9kHz | 
| Technology | Piezo (with Feedback) | 
| Operating Mode | Single Tone | 
| Duration | - | 
| Sound Pressure Level (SPL) | 100dB @ 12V, 10cm | 
| Current - Supply | - | 
| Port Location | Top | 
| Operating Temperature | -10°C ~ 60°C | 
| Approvals | - | 
| Ratings | - | 
| Ingress Protection | - | 
| Mounting Type | Through Hole | 
| Termination | PC Pins | 
| Size / Dimension | 1.181" Dia (30.00mm) | 
| Height - Seated (Max) | 0.394" (10.00mm) |