VFG-30747-000

Overview

The VFG-30747-000 is an omnidirectional electret microphone manufactured by Knowles. It features a compact cylindrical design with a diameter of 3 mm and a total length of 115 mm, including a 25.4 mm Litz wire lead. The device operates at a supply voltage of 1.3 V with a current rating of 50 uA. It provides a sensitivity of -55 dBA and presents an impedance of 4.4 kOhms. The unit is rated IP67 for environmental protection and utilizes a 3-wire configuration.

Feature Summary

• Omnidirectional acoustic response for uniform sound capture from all directions
• IP67 ingress protection rating ensuring resistance to dust and water immersion
• Integrated 25.4 mm Litz wire lead for flexible connection routing
• Low power consumption suitable for battery-operated audio systems

Applications

• Audio recording in harsh or wet environments
• Industrial monitoring equipment requiring dust and moisture resistance
• Medical devices necessitating sterilizable or washable components
• Outdoor communication hardware

Procurement Notes

This component is officially discontinued and no longer in production. Verification of availability should focus on surplus stock or secondary market sources rather than direct manufacturer fulfillment. Confirm the specific manufacturing date code and physical condition of available units prior to acquisition, as long-term storage may impact performance characteristics.

Selection Notes

Engineers must account for the discontinuation status when selecting this microphone for new designs. The fixed 115 mm length and 3 mm diameter impose strict spatial constraints. Verify that the required 1.3 V operating voltage aligns with the target system's power budget and that the 4.4 kOhm impedance matches the preamplifier input requirements.

Part Context

The VFG-30747-000 belongs to the VFG series of microphones produced by Knowles. This series specializes in ruggedized audio sensors designed for durability. The specific model integrates standard electret technology within a sealed housing to withstand challenging operational conditions while maintaining consistent acoustic performance.

Replacement Considerations

As this part is discontinued, no official direct substitute is listed in public documentation. Designers should evaluate other omnidirectional microphones with similar IP ratings and dimensions, ensuring compatibility with the existing 1.3 V bias voltage and 3-wire interface topology.