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| PartNumber | PLD-21N30WQ | PLD-21N30PQ | PLD-20A35EWQ |
| Description | Audio Indicators & Alerts CONSTANT/SLOW PULSE 3-28VDC, 80DB, 24X10 | Audio Indicators & Alerts CONSTANT/SLOW PULSE 3-28VDC, 80DB, 24X10 | Audio Indicators & Alerts CONSTANT/SLOW PULSE 3.5KHZ, 95DB, 28X25 |
| Manufacturer | Mallory Sonalert | Mallory Sonalert | Mallory Sonalert |
| Product Category | Audio Indicators & Alerts | Audio Indicators & Alerts | Audio Indicators & Alerts |
| RoHS | Y | Y | Y |
| Product | Piezo Transducers | Piezo Transducers | Buzzers |
| Sound Pressure Level | 80 dBA | 80 dBA | 95 dBA |
| Tone | Continuous | Continuous | Continuous |
| Frequency | 3 kHz | 3 kHz | 3.5 kHz |
| Voltage Rating | 12 V | 12 V | 12 V |
| Current Rating | 12 mA | 12 mA | 10 mA |
| Termination Style | Wire Leads | Solder Pin | Wire Leads |
| IP Rating | - | - | - |
| Mounting | Flange | Through Hole | Flange |
| Length | 24 mm | 24 mm | 28 mm |
| Series | PLD | PLD | PLD |
| Brand | Mallory Sonalert | Mallory Sonalert | Mallory Sonalert |
| Length in | 0.945 in | 0.945 in | - |
| Length mm | 24 mm | 24 mm | - |
| Product Type | Audio Indicators & Alerts | Audio Indicators & Alerts | Audio Indicators & Alerts |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Audio Devices | Audio Devices | Audio Devices |
| Diameter | - | - | 28 mm |
| Dimensions | - | - | 28 mm L x 28 mm W x 25 mm H |
| Height | - | - | 25 mm |
| Width | - | - | 28 mm |
| Height in | - | - | 0.984 in |
| Height mm | - | - | 25 mm |
| Unit Weight | - | - | 0.352740 oz |