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| Part Number | SBM428R |
| Datasheet | SBM428R datasheet |
| Description | AUDIO PIEZO INDICATOR 4-28V TH |
| Manufacturer | Mallory Sonalert Products Inc. |
| Series | SBM |
| Part Status | Active |
| Driver Circuitry | Indicator, Internally Driven |
| Input Type | DC |
| Voltage - Rated | - |
| Voltage Range | 4 ~ 28V |
| Frequency | 2.9kHz |
| Technology | Piezo |
| Operating Mode | Single Tone |
| Duration | - |
| Sound Pressure Level (SPL) | 64dB @ 4V, 61cm |
| Current - Supply | 3 ~ 16mA |
| Port Location | Top |
| Operating Temperature | -30°C ~ 65°C |
| Approvals | cUL, UL |
| Ratings | - |
| Ingress Protection | - |
| Mounting Type | Through Hole |
| Termination | PC Pins |
| Size / Dimension | 1.687" Dia (42.85mm) |
| Height - Seated (Max) | 0.684" (17.37mm) |