+86 13691825231
jerry@srdic.cn-
ALL Products
- Passive
- Audio Products
-
Circuit Protection
- Circuit Breakers
- Circuit Protection Accessories
- Electrical, Specialty Fuses
- Fuseholders
- Fuses
- Gas Discharge Tube Arresters (GDT)
- Ground Fault Circuit Interrupter (GFCI)
- Inrush Current Limiters (ICL)
- Lighting Protection
- PTC Resettable Fuses
- Surge Suppression Ics
- Thermal Cutoffs (Thermal Fuses)
- Transient Voltage Suppressors (TVS)
-
Connectors, Interconnects
- AC Power Connectors
- Backplane Connectors
- Banana and Tip Connectors
- Barrel Connectors
- Between Series Adapters
- Blade Type Power Connectors
- Card Edge Connectors
- Circular Connectors
- Coaxial Connectors (RF)
- Contacts
- D-Sub, D-Shaped Connectors
- FFC, FPC (Flat Flexible) Connectors
- Fiber Optic Connectors
- Heavy Duty Connectors
- Keystone Connectors
- LGH Connectors
- Memory Connectors
- Modular Connectors
- Photovoltaic (Solar Panel) Connectors
- Pluggable Connectors
- Rectangular Connectors
- Shunts, Jumpers
- Sockets for ICs, Transistors
- Solid State Lighting Connectors
- Terminal Blocks
- Terminal Junction Systems
- Terminal Strips and Turret Boards
- Terminals
- USB, DVI, HDMI Connectors
- Discrete Semiconductor Products
- Integrated Circuits (ICs)
- Memory Cards, Modules
- Relays
-
RF/IF and RFID
- Attenuators
- Balun
- RF Accessories
- RF Amplifiers
- RF Antennas
- RF Circulators and Isolators
- RF Demodulators
- RF Detectors
- RF Directional Coupler
- RF Front End (LNA + PA)
- RF Misc ICs and Modules
- RF Mixers
- RF Modulators
- RF Multiplexers
- RF Power Controller ICs
- RF Power Dividers/Splitters
- RF Receiver, Transmitter, and Transceiver Finished
- RF Receivers
- RF Shields
- RF Switches
- RF Transceiver ICs
- RF Transceiver Modules and Modems
- RF Transmitters
- RFI and EMI - Contacts, Fingerstock and Gaskets
- RFI and EMI - Shielding and Absorbing Materials
- RFID Accessories
- RFID Antennas
- RFID Reader Modules
- RFID Transponders, Tags
- RFID, RF Access, Monitoring ICs
- Subscriber Identification Module (SIM) Cards
-
Sensors, Transducers
- Color Sensors
- Color Sensors - Industrial
- Current Sensors
- Encoders
- Encoders - Industrial
- Float, Level Sensors
- Float, Level Sensors - Industrial
- Flow Sensors
- Flow Sensors - Industrial
- Force Sensors
- Force Sensors - Industrial
- Gas Sensors
- Humidity, Moisture Sensors)
- IrDA Transceiver Modules
- LVDT Transducers (Linear Variable Differential Tra
- Magnetic Sensors
- Magnets
- Motion Sensors
- Multifunction
- Optical Sensors
- Particle, Dust Sensors
- Position Sensors
- Pressure Sensors, Transducers
- Pressure Sensors, Transducers - Industrial
- Proximity Sensors
- Proximity Sensors - Industrial
- Proximity/Occupancy Sensors Finished Units
- Sensor Cable Accessories
- Sensor Cable Assemblies
- Sensor Interface Junction Blocks
- Sensor, Transducer Accessories
- Sensor, Transducer Amplifiers
- Shock Sensors
- Solar Cells
- Specialized Sensors
- Strain Gauges
- Temperature Sensors
- Touch Sensors
- Ultrasonic Receivers, Transmitters
- Ultrasonic Receivers, Transmitters - Industrial
-
Switches
- Accessories
- Accessories - Boots, Seals
- Accessories - Caps
- Cable Pull Switches
- Configurable Switch Components - Body
- Configurable Switch Components - Contact Block
- Configurable Switch Components - Illumination Sour
- Configurable Switch Components - Lens
- DIP Switches
- Disconnect Switch Components
- Emergency Stop (E-Stop) Switches
- Interlock Switches
- Keylock Switches
- Keypad Switches
- Limit Switches
- Magnetic, Reed Switches
- Navigation Switches, Joystick
- Programmable Display Switches
- Pushbutton Switches
- Pushbutton Switches - Hall Effect
- Rocker Switches
- Rotary Switches
- Selector Switches
- Slide Switches
- Tactile Switches
- Thumbwheel Switches
- Toggle Switches
- Transformers
- View More >>
Knowles EF-21937-000
EF-21937-000
- Manufacturer: Knowles
- Origchip NO: EF-21937-000
- Package:
- Datasheet:
PDF - Stock: 9983
- Description: EF-21937-000(Kg)
Quantity:
Qty
Unit Price
Ext Price
-
25
$19.55
$488.80
Not the price you want? Send RFQ Now and we'll contact you ASAP.
In Stock
Please send RFQ , we will respond immediately.
Purchase
You may place an order without registering to SERDIA.
We strongly suggest you sign in before purchasing as you
can track your order in real time.
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.
Currently, our products are shipped through DHL, FedEx, SF, and UPS.
Delivery TimeOnce 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.| Parameters | |
|---|---|
| Efficiency - Type | Sensitivity |
| Port Location | Top |
| Shape | Rectangular |
| Material - Cone | - |
| Material - Magnet | - |
| Ingress Protection | - |
| Ratings | - |
| Termination | Solder Pads |
| Size / Dimension | 0.310" L x 0.220" W (7.87mm x 5.59mm) |
| Height - Seated (Max) | 0.310" (7.87mm) |
| RoHS Status | RoHS Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
| ECCN | EAR99 |
| HTSUS | 8518.29.8000 |
| Standard Package | 25 |
| Mfr | Knowles |
| Series | EF |
| Package | Tray |
| Product Status | Active |
| Technology | Magnetic |
| Type | Receiver |
| Frequency Range | 200 Hz ~ 6.3 kHz |
| Frequency - Self Resonant | - |
| Impedance | 641 Ohms |
| Efficiency - dBA | 122.00 |
| Efficiency - Testing | - |
641 Ohms Receiver Speaker 200 Hz ~ 6.3 kHz Top Rectangular
Related Products
Visaton GmbH & Co. KG ML 16 A - 100 V (NCS S0500-N)
$41.04
Knowles SWFK-32254-000
$48.63Soberton Inc. WSP-5090-4
$4.61Seltech CR1609S030BN8GDAC-2
$4.25DB Unlimited SZ300812-1
$4.36Seltech CS50C28DN4GF
$4.50PUI Audio, Inc. AS07104PO-LW152-R
$4.85CUI Devices CMS-181325-078SP-67
$2.28PUI Audio, Inc. AS04008CO-2-R
$5.05PUI Audio, Inc. AS01508MR-6-R
$2.78Knowles RVA-90063-N20
$67.54Peerless by Tymphany SDF-250F75PR01-06
Peerless by Tymphany BC25SG15-04
DB Unlimited SM360508-2
$2.76Soberton Inc. SP-4510
$3.94PUI Audio, Inc. AS02016MR-2-R
$2.46
Knowles ED-23993-000
Knowles RVA-90020-N17
$50.455 Core Inc MR 8 BLT R 8oHM
$23.94CUI Devices CMS-15113-078L100B-67
$2.38PUI Audio, Inc. AS09008PO-WR-R
Peerless by Tymphany OX20SC00-04
$16.23PUI Audio, Inc. AS07108PO-LW152-WR-R
$5.36CUI Devices CLS0361-L152
$5.49Knowles RVA-90063-N18
$67.54DB Unlimited SP400608-1
$4.14
Visaton GmbH & Co. KG G 25 FFL - 8 OHM
$60.90CUI Devices GF0778B
$6.03
