Knowles BL-21671-140
- Part No.:
- BL-21671-140
- Manufacturer:
- Knowles
- Category:
- Microphones
- Package:
- Datasheet:
-
BL-21671-140.pdf
- Description:
- MIC PIEZO ANALOG OMNI -54.5DB
- Quantity:
- Payment:

- Shipping:

Inventory:2,017
Please send an inquiry. Send us your inquiry, and we will respond immediately.
BL-21671-140 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Knowles
- Series:
- BL
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Piezo
- Output Type:
- Analog
- Direction:
- Omnidirectional
- Frequency Range:
- 100 Hz ~ 2.5 kHz
- Sensitivity:
- -54.5dB ±3dB @ 74dB SPL
- S/N Ratio:
- -
- Impedance:
- 13 kOhms
- Voltage - Rated:
- 1.3 V
- Voltage Range:
- -
- Current - Supply:
- 50 µA
- Port Location:
- Side
- Ratings:
- -
- Termination:
- Solder Pads
- Size / Dimension:
- 0.310" L x 0.218" W (7.87mm x 5.54mm)
- Height (Max):
- 0.163" (4.13mm)
- Shape:
- Rectangular
- Grade:
- -
- Qualification:
- -
BL-21671-140 FAQ
1.How can I place an order for BL-21671-140 through Aetrix?
Please submit a Request for Quotation (RFQ) for BL-21671-140 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BL-21671-140 reliable?
The price and inventory of BL-21671-140 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BL-21671-140 is usually 5 days.
3.What payment methods are accepted for BL-21671-140?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BL-21671-140 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BL-21671-140?
BL-21671-140 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BL-21671-140 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BL-21671-140?
For technical support, including BL-21671-140 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BL-21671-140 requirements.
6.How does Aetrix verify that BL-21671-140 is sourced from the original manufacturer or authorized distributors?
All BL-21671-140 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BL-21671-140 meets industry standards.
7.What is the process for return or replacement of BL-21671-140?
All BL-21671-140 units undergo pre-shipment inspection (PSI). If there is an issue with BL-21671-140, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BL-21671-140 part is unused and in its original packaging.
Return procedure for BL-21671-140:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BL-21671-140 Tags

-
SPU0410LR5H-QB
Knowles

-
CMA-4544PF-W
Same Sky (Formerly CUI Devices)

-
CMB-6544PF
Same Sky (Formerly CUI Devices)

-
SPH0641LM4H-1
Knowles

-
CMA-6542PF
Same Sky (Formerly CUI Devices)

-
SPV0142LR5H-1
Knowles

-
AOM-4544P-2-R
PUI Audio, Inc.

-
MMICT390200012
TDK InvenSense
-
SPH0690LM4H-1
Knowles
-
EM-6022P
Soberton Inc.
-
SPH6611LR5H-1
Knowles

-
AMM-3738-B-R
PUI Audio, Inc.
Tech Hub
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
Machine vision system guide covering components, inspection workflow, camera and lens selection, FOV, pixel resolution, motion blur, strobe lighting, bandwidth, 2D/3D vision, integration, troubleshooti…
Electronic devices and circuits guide covering passive components, semiconductors, analog and digital circuits, circuit theory, practical calculations, troubleshooting, datasheet selection, and learnin…
Oil pressure sensor diagnosis covering symptoms, location, testing, replacement, socket access, common failure cases, and the electronic signal path between the pressure sensor, wiring, ECU and gauge s…
MLCC ESR, impedance and self-resonant frequency in decoupling networks. Covers PDN behavior, frequency response, measurement methods, failure cases and practical capacitor selection for power integrity…
An actuator converts a control signal and energy source into mechanical motion. This guide explains actuator types, working principles, electric and linear actuators, automotive use cases, troubleshoot…
A potentiometer is a three-terminal adjustable resistor used for voltage division, analog control, calibration and signal adjustment. This guide explains wiring, symbols, types, 10k values, digital pot…
