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  • Manufacturer: Knowles
  • Origchip NO: 427-BJ-21591-000
  • Package: -
  • Datasheet: PDF
  • Stock: 220
  • Description: MICROPHONE MAG ANALOG -75DB(Kg)

Purchase & Inquiry



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Means of Payment

For your convenience, we accept multiple payment methods in USD, including PayPal, Credit Card, and wire transfer.

RFQ (Request for Quotations)

It is recommended to request for quotations to get the latest prices and inventories about the part.
Our sales will reply to your request by email within 24 hours.


1. You'll receive an order information email in your inbox. (Please remember to check the spam folder if you didn't hear from us).
2. Since inventories and prices may fluctuate to some extent, the sales manager is going to reconfirm the order and let you know if there are any updates.

Shipping Cost

Shipping starts at $40, but some countries will exceed $40. For example (South Africa, Brazil, India, Pakistan, Israel, etc.)
The basic freight (for package ≤0.5kg or corresponding volume) depends on the time zone and country.

Shipping Method

Currently, our products are shipped through DHL, FedEx, SF, and UPS.

Delivery Time

Once the goods are shipped, estimated delivery time depends on the shipping methods you chose:

FedEx International, 5-7 business days.

The following are some common countries' logistic time.



Factory Lead Time 8 Weeks
Shape Rectangular
Packaging Bulk
Published 2008
Series BJ
Size / Dimension 0.310Lx0.220W 7.87mmx5.59mm
Part Status Active
Moisture Sensitivity Level (MSL) 1 (Unlimited)
Termination Solder Pads
Type Magnetic
Output Type Analog
Impedance 3.9kOhm
Frequency Range 300Hz~5kHz
Sensitivity -75dB ±2.5dB @ 74dB SPL
Port Location Side
Height (Max) 0.160 4.06mm
RoHS Status RoHS Compliant
See Relate Datesheet
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