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PF-21N30WQ
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Product Detailed Parameters
- Description：BUZZER PIEZO 12V 24MM FLANGE
- Series：PF
- Mfr：Mallory Sonalert Products Inc.
- Package：Bulk
- Driver Circuitry：Indicator, Internally Driven
- Input Type：DC
- Frequency：3kHz
- Technology：Piezo
- Operating Mode：Pulse, Fast
- Duration：3 PPS
- Sound Pressure Level (SPL)：80dB @ 12V, 30cm
- Current - Supply：12mA
- Port Location：Top
- Operating Temperature：-20°C ~ 70°C
- Approval Agency：-
- Ratings：-
- Ingress Protection：-
- Mounting Type：Panel Mount, Flange
- Termination：Wire Leads
- Height - Seated (Max)：0.382" (9.70mm)
- Voltage - Rated：12 V
- Voltage Range：3 ~ 30V
- Size / Dimension：0.945" Dia (24.00mm)
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Overview
The PF-21N30WQ is a piezoelectric audio indicator from the PL series by Mallory Sonalert. It operates on a voltage range of 3 to 30 VDC with a rated current of 12 mA at 12 VDC. The device produces a fast pulse tone at a frequency of 3 kHz and achieves a sound pressure level of 80 dB. Its physical dimensions are 24 mm in diameter and 9.5 mm in height, featuring wire lead termination for mounting.
Feature Summary
- Generates a fast pulse acoustic signal using piezoelectric technology
- Operates within a wide DC voltage range of 3 to 30 volts
- Provides high-intensity audible alerts suitable for industrial environments
Applications
- Industrial equipment status indication
- Electronic system alarm signaling
- Control panel audio feedback
Procurement Notes
Verify the specific operating mode required, as the PL series includes both slow and fast pulse variants. Confirm that the application voltage falls within the 3-30 VDC range to ensure proper function. Check datasheet specifications for sound pressure level measurements at the intended distance. Ensure wire lead termination compatibility with the assembly design.
Selection Notes
Select this component when a compact, low-power piezoelectric buzzer is needed for clear audible alerts. The fast pulse characteristic distinguishes it from continuous or slow pulse models. Consider the 80 dB output level relative to ambient noise requirements. Verify that the 24 mm form factor fits the available enclosure space.
Part Context
This part belongs to the PL series of industrial-grade audio indicators manufactured by Mallory Sonalert Products Inc. The series is designed for reliable performance in demanding electronic applications. The PL designation typically indicates a piezoelectric element with specific acoustic modulation characteristics.
Replacement Considerations
The PL-21N30WQ serves as the slow pulse variant within the same physical footprint and electrical parameters. Verify if the slower modulation rate meets the alert requirements before substituting.
