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PF-27N29ERQ
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Product Detailed Parameters
- Description：BUZZER PIEZO 12V 35.5MM PNL MNT
- Series：PF
- Mfr：Mallory Sonalert Products Inc.
- Package：Bulk
- Driver Circuitry：Indicator, Internally Driven
- Input Type：DC
- Frequency：2.9kHz
- Technology：Piezo
- Operating Mode：Pulse, Fast
- Duration：3 PPS
- Sound Pressure Level (SPL)：90dB @ 12V, 30cm
- Current - Supply：15mA
- Port Location：Top
- Operating Temperature：-20°C ~ 70°C
- Approval Agency：-
- Ratings：-
- Ingress Protection：-
- Mounting Type：Panel Mount
- Termination：Screw Terminal, Quick Connect Tab - 0.252" (6.40mm)
- Height - Seated (Max)：1.240" (31.50mm)
- Voltage - Rated：12 V
- Voltage Range：3 ~ 28V
- Size / Dimension：1.398" Dia (35.50mm)
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Overview
The PF-27N29ERQ is a piezoelectric buzzer manufactured by Mallory Sonalert Products Inc. It features an internally driven indicator circuit and accepts DC input. The rated voltage is 12 VDC, with an operating range of 3 to 28 VDC. Maximum current consumption is specified at 50 mA. The oscillation frequency is 2900 Hz with a tolerance of ±500 Hz. The device utilizes panel mounting and has a diameter of 35.5 mm.
Feature Summary
- Internally driven piezoelectric technology for simplified integration
- Wide operating voltage range supporting 3V to 28V DC inputs
- Panel mount design with 35.5mm diameter form factor
Applications
- Industrial control panels requiring visual and audible alerts
- Equipment status indication systems
- Safety warning devices in machinery
Procurement Notes
Verify the specific suffix requirements against the official Mallory Sonalert datasheet to ensure correct voltage and acoustic specifications. Confirm that the 3-28V operating range aligns with the target system power supply. Check for RoHS compliance documentation if environmental regulations apply to the end product assembly process.
Selection Notes
Select this component when a wide input voltage range is required for a single part number across different system configurations. The internal driver eliminates the need for external oscillator circuits. Ensure the 35.5mm panel cutout dimension fits the available enclosure space. Consider the 2900Hz frequency for appropriate audibility in the intended environment.
Part Context
This part belongs to the Mallory Sonalert piezoelectric buzzer family. It shares the internally driven architecture common to industrial audio indicators. The 2900Hz frequency is standard for many alert applications within this series. The panel mount style distinguishes it from through-hole or PCB mounted variants in the broader product catalog.
Replacement Considerations
Cross-reference with other Mallory Sonalert parts sharing the 2900Hz frequency and 35.5mm diameter. Verify voltage compatibility before substituting with similar models from the same manufacturer.
