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| PartNumber | ZA028LDSR8 | ZA028LDSP1 | ZA028LDSR9 |
| Description | Audio Indicators & Alerts 16 to 28 VDC 3300 +/- 500 Hz | Audio Indicators & Alerts 22MM, 16-28VDC, ROHS, STK | Audio Indicators & Alerts 16 to 28 VDC 3300 +/- 500 Hz |
| Manufacturer | Mallory Sonalert | Mallory Sonalert | Mallory Sonalert Products Inc. |
| Product Category | Audio Indicators & Alerts | Audio Indicators & Alerts | Buzzers |
| RoHS | Y | Y | - |
| Product | Panel Alarms | - | Panel Alarms |
| Sound Pressure Level | 95 dBA | - | 85dB @ 28V, 61cm |
| Tone | Siren | - | Siren |
| Frequency | 3.3 kHz | - | 3.3kHz |
| Voltage Rating | 28 V | 28 V | 28 VDC |
| Current Rating | 40 mA | 40 mA | 40 mA |
| Termination Style | Terminal Block | Terminal Block | Screw |
| IP Rating | - | - | - |
| Diameter | 30.74 mm | - | 30.74 mm |
| Mounting | Panel | Panel | Panel |
| Length | 43.44 mm | - | 43.44 mm |
| Series | ZA | ZA | ZA |
| Brand | Mallory Sonalert | Mallory Sonalert | - |
| Length in | 1.71 in | - | - |
| Length mm | 43.44 mm | - | - |
| Product Type | Audio Indicators & Alerts | Audio Indicators & Alerts | - |
| Factory Pack Quantity | 10 | 1 | - |
| Subcategory | Audio Devices | Audio Devices | - |
| Packaging | - | - | Bulk |
| Termination | - | - | Terminal Block |
| Driver Circuitry | - | - | Indicator, Internally Driven |
| Technology | - | - | Piezo |
| Input Type | - | - | DC |
| Voltage Rated | - | - | - |
| Voltage Range | - | - | 16 ~ 28V |
| Operating Mode | - | - | Siren Sweep |
| Current Supply | - | - | 40mA |
| Operating Temperature | - | - | -30°C ~ 50°C |
| Washable | - | - | Yes |
| Port Location | - | - | Top |
| Mounting Type | - | - | Panel Mount |
| Size Dimension | - | - | 30.7mm Dia x 43.4mm H |
| Dimensions | - | - | 43.44 mm L |
| Length in | - | - | 1.71 in |
| Length mm | - | - | 43.44 mm |