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Image Part # Manufacturer Description Availability Pricing Quantity Factory Lead TimePackage / CaseShapePackagingPublishedSeriesSize / DimensionPart StatusMoisture Sensitivity Level (MSL)TerminationTypeDepthFrequencyImpedanceFrequency RangePort LocationEfficiency - dBAEfficiency - TypeHeightHeight Seated (Max)LengthWidthRoHS Status
Knowles EF-21763-000
Mfr. Part #
EF-21763-000
Twicea Part #
427-54-EF-21763-000 		Knowles
Speakers & Transducers 7.87 X 5.59 X 4.01MM 125 SENS, 12S PORT
Datasheet Compare
31 In Stock
    Min.:1
    Mult.:1
    		 8 Weeks 125 Rectangular Bulk 2005 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.3kHz 1.275kOhm 200Hz~6.3kHz Top 122.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
    EF-21763-000
    EF-21763-000

    427-54-EF-21763-000 Knowles
    RoHS :
    Package : -
    In Stock : 31
    1 : -
    Knowles EF-28378-000
    Mfr. Part #
    EF-28378-000
    Twicea Part #
    427-54-EF-28378-000     		Knowles
    Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 12S PORT
    Datasheet Compare
    15 In Stock
      Min.:1
      Mult.:1
      		 4 Weeks - Rectangular Bulk 2005 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.3kHz 1.275kOhm 200Hz~6.3kHz Top 122.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
      EF-28378-000
      EF-28378-000

      427-54-EF-28378-000 Knowles
      RoHS :
      Package : -
      In Stock : 15
      1 : -
      Knowles EF-26161-116
      Mfr. Part #
      EF-26161-116
      Twicea Part #
      427-54-EF-26161-116       		Knowles
      Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 2S PORT
      Datasheet Compare
      31 In Stock
        Min.:1
        Mult.:1
        		 4 Weeks - Rectangular Bulk 2006 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.3kHz 542Ohm 200Hz~6.3kHz Side 122.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
        EF-26161-116
        EF-26161-116

        427-54-EF-26161-116 Knowles
        RoHS :
        Package : -
        In Stock : 31
        1 : -
        Knowles EF-26635-000
        Mfr. Part #
        EF-26635-000
        Twicea Part #
        427-54-EF-26635-000         		Knowles
        Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 2S PORT
        Datasheet Compare
        31 In Stock
          Min.:1
          Mult.:1
          		 4 Weeks - Rectangular Bulk 2006 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.3kHz 136Ohm 200Hz~6.3kHz Side 122.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
          EF-26635-000
          EF-26635-000

          427-54-EF-26635-000 Knowles
          RoHS :
          Package : -
          In Stock : 31
          1 : -
          Knowles BK-21839-000
          Mfr. Part #
          BK-21839-000
          Twicea Part #
          427-54-BK-21839-000           		Knowles
          Speakers & Transducers Balanced Armature Speaker
          Datasheet Compare
          31 In Stock
            Min.:1
            Mult.:1
            		 4 Weeks - Rectangular Bulk 2005 BK 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 4mm 6kHz 750Ohm 200Hz~6kHz Top 127.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
            BK-21839-000
            BK-21839-000

            427-54-BK-21839-000 Knowles
            RoHS :
            Package : -
            In Stock : 31
            1 : -
            Knowles ED-21739-000
            Mfr. Part #
            ED-21739-000
            Twicea Part #
            427-54-ED-21739-000             		Knowles
            Speakers & Transducers Balanced Armature Speaker
            Datasheet Compare
            31 In Stock
              Min.:1
              Mult.:1
              		 4 Weeks - Rectangular Bulk 2008 ED 0.248Lx0.169W 6.30mmx4.29mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 3mm 5kHz 1.5kOhm 200Hz~5kHz Top 107.00 Sensitivity - 0.248 6.30mm - - RoHS Compliant
              ED-21739-000
              ED-21739-000

              427-54-ED-21739-000 Knowles
              RoHS :
              Package : -
              In Stock : 31
              1 : -
              Knowles BK-21612-000
              Mfr. Part #
              BK-21612-000
              Twicea Part #
              427-54-BK-21612-000               		Knowles
              Speakers & Transducers Balanced Armature Speaker
              Datasheet Compare
              31 In Stock
                Min.:1
                Mult.:1
                		 4 Weeks - Rectangular Bulk 2007 BK 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 4mm 3.8kHz 2.36kOhm 200Hz~3.8kHz Top 126.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
                BK-21612-000
                BK-21612-000

                427-54-BK-21612-000 Knowles
                RoHS :
                Package : -
                In Stock : 31
                1 : -
                Knowles EF-21937-000
                Mfr. Part #
                EF-21937-000
                Twicea Part #
                427-54-EF-21937-000                 		Knowles
                Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 12S PORT
                Datasheet Compare
                31 In Stock
                  Min.:1
                  Mult.:1
                  		 6 Weeks - Rectangular Tray 2005 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.3kHz 641Ohm 200Hz~6.3kHz Top 122.00 Sensitivity 4.06mm 0.310 7.87mm - - RoHS Compliant
                  EF-21937-000
                  EF-21937-000

                  427-54-EF-21937-000 Knowles
                  RoHS :
                  Package : -
                  In Stock : 31
                  1 : -
                  Knowles BK-23134-000
                  Mfr. Part #
                  BK-23134-000
                  Twicea Part #
                  427-54-BK-23134-000                   		Knowles
                  Speakers & Transducers Balanced Armature Speaker
                  Datasheet Compare
                  31 In Stock
                    Min.:1
                    Mult.:1
                    		 8 Weeks - Rectangular Bulk 2007 BK 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 4mm 4kHz 730Ohm 200Hz~4kHz Top 126.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
                    BK-23134-000
                    BK-23134-000

                    427-54-BK-23134-000 Knowles
                    RoHS :
                    Package : -
                    In Stock : 31
                    1 : -
                    Knowles EF-26692-116
                    Mfr. Part #
                    EF-26692-116
                    Twicea Part #
                    427-54-EF-26692-116                     		Knowles
                    Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 2S PORT
                    Datasheet Compare
                    15 In Stock
                      Min.:1
                      Mult.:1
                      		 4 Weeks - Rectangular Bulk 2006 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.3kHz 555Ohm 200Hz~6.3kHz Side 122.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
                      EF-26692-116
                      EF-26692-116

                      427-54-EF-26692-116 Knowles
                      RoHS :
                      Package : -
                      In Stock : 15
                      1 : -
                      Knowles EF-26426-000
                      Mfr. Part #
                      EF-26426-000
                      Twicea Part #
                      427-54-EF-26426-000                       		Knowles
                      Speakers & Transducers 7.87 X 5.59 X 4.01MM 122 SENS, 1S PORT
                      Datasheet Compare
                        Min.:1
                        Mult.:1
                        		 4 Weeks - Rectangular Bulk 2005 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.3kHz 160Ohm 200Hz~6.3kHz Top 118.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
                        EF-26426-000
                        EF-26426-000

                        427-54-EF-26426-000 Knowles
                        RoHS :
                        Package : -
                        In Stock : -
                        1 : -
                        Knowles CI-28203-000
                        Mfr. Part #
                        CI-28203-000
                        Twicea Part #
                        427-54-CI-28203-000                         		Knowles
                        Speakers & Transducers Balanced Armature Speaker
                        Datasheet Compare
                        31 In Stock
                          Min.:1
                          Mult.:1
                          		 4 Weeks - Rectangular Bulk 2011 CI 0.373Lx0.283W 9.47mmx7.18mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 4.1mm 5.5kHz 174Ohm 200Hz~5.5kHz Top 131.50 Sensitivity - 0.164 4.16mm - - RoHS Compliant
                          CI-28203-000
                          CI-28203-000

                          427-54-CI-28203-000 Knowles
                          RoHS :
                          Package : -
                          In Stock : 31
                          1 : -
                          Knowles ED-21992-000
                          Mfr. Part #
                          ED-21992-000
                          Twicea Part #
                          427-54-ED-21992-000                           		Knowles
                          Speakers & Transducers Balanced Armature Speaker
                          Datasheet Compare
                          31 In Stock
                            Min.:1
                            Mult.:1
                            		 4 Weeks - Rectangular Bulk 2008 ED 0.248Lx0.169W 6.30mmx4.29mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 3mm 5kHz 760Ohm 200Hz~5kHz Top 107.00 Sensitivity - 0.248 6.30mm - - RoHS Compliant
                            ED-21992-000
                            ED-21992-000

                            427-54-ED-21992-000 Knowles
                            RoHS :
                            Package : -
                            In Stock : 31
                            1 : -
                            Knowles EF-26636-000
                            Mfr. Part #
                            EF-26636-000
                            Twicea Part #
                            427-54-EF-26636-000                             		Knowles
                            Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 2S PORT
                            Datasheet Compare
                            6 In Stock
                              Min.:1
                              Mult.:1
                              		 4 Weeks - Rectangular Bulk 2006 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.1kHz 101Ohm 200Hz~6.1kHz Side 109.50 Sound Pressure Level (SPL) - 0.310 7.87mm - - RoHS Compliant
                              EF-26636-000
                              EF-26636-000

                              427-54-EF-26636-000 Knowles
                              RoHS :
                              Package : -
                              In Stock : 6
                              1 : -
                              Knowles EF-29802-000
                              Mfr. Part #
                              EF-29802-000
                              Twicea Part #
                              427-54-EF-29802-000                               		Knowles
                              Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 12S PORT
                              Datasheet Compare
                              31 In Stock
                                Min.:1
                                Mult.:1
                                		 4 Weeks - Rectangular Bulk 2005 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.3kHz 3.382kOhm 200Hz~6.3kHz Top 122.00 Sensitivity - 0.310 7.87mm - - RoHS Compliant
                                EF-29802-000
                                EF-29802-000

                                427-54-EF-29802-000 Knowles
                                RoHS :
                                Package : -
                                In Stock : 31
                                1 : -
                                Knowles FC-26887-000
                                Mfr. Part #
                                FC-26887-000
                                Twicea Part #
                                427-54-FC-26887-000                                 		Knowles
                                Speakers & Transducers Balanced Armature Speaker
                                Datasheet Compare
                                24 In Stock
                                  Min.:1
                                  Mult.:1
                                  		 8 Weeks - Rectangular Bulk 2006 FC 0.204Lx0.140W 5.18mmx3.55mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 3mm 5.2kHz 550Ohms 200Hz~5.2kHz Top 100.00 Sound Pressure Level (SPL) - 0.120 3.05mm 5.18mm 3.54mm RoHS Compliant
                                  FC-26887-000
                                  FC-26887-000

                                  427-54-FC-26887-000 Knowles
                                  RoHS :
                                  Package : -
                                  In Stock : 24
                                  1 : -
                                  Knowles FK-26889-000
                                  Mfr. Part #
                                  FK-26889-000
                                  Twicea Part #
                                  427-54-FK-26889-000                                   		Knowles
                                  Speakers & Transducers Balanced Armature Speaker
                                  Datasheet Compare
                                  31 In Stock
                                    Min.:1
                                    Mult.:1
                                    		 8 Weeks - Rectangular Bulk 2012 FK 0.207Lx0.113W 5.26mmx2.87mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 2mm 6kHz 940Ohm 200Hz~6kHz Side 93.00 Sound Pressure Level (SPL) - 0.078 1.98mm - - RoHS Compliant
                                    FK-26889-000
                                    FK-26889-000

                                    427-54-FK-26889-000 Knowles
                                    RoHS :
                                    Package : -
                                    In Stock : 31
                                    1 : -
                                    Knowles BK-21606-000
                                    Mfr. Part #
                                    BK-21606-000
                                    Twicea Part #
                                    427-54-BK-21606-000                                     		Knowles
                                    Speakers & Transducers Balanced Armature Speaker
                                    Datasheet Compare
                                    6 In Stock
                                      Min.:1
                                      Mult.:1
                                      		 8 Weeks - Rectangular Tray 2007 BK 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 4mm 3.8kHz 1.5kOhm 200Hz~3.8kHz Top 126.00 Sensitivity 4mm 0.310 7.87mm - - RoHS Compliant
                                      BK-21606-000
                                      BK-21606-000

                                      427-54-BK-21606-000 Knowles
                                      RoHS :
                                      Package : -
                                      In Stock : 6
                                      1 : -
                                      Knowles EF-30037-000
                                      Mfr. Part #
                                      EF-30037-000
                                      Twicea Part #
                                      427-54-EF-30037-000                                       		Knowles
                                      Speakers & Transducers 7.87 X 5.59 X 4.01MM 119 SENS, 1S PORT
                                      Datasheet Compare
                                      31 In Stock
                                        Min.:1
                                        Mult.:1
                                        		 8 Weeks - Rectangular Bulk 2006 EF 0.310Lx0.220W 7.87mmx5.59mm Active 1 (Unlimited) Solder Pads Receiver 4.06mm 6.1kHz 98Ohm 200Hz~6.1kHz Top 109.50 Sound Pressure Level (SPL) - 0.310 7.87mm - - RoHS Compliant
                                        EF-30037-000
                                        EF-30037-000

                                        427-54-EF-30037-000 Knowles
                                        RoHS :
                                        Package : -
                                        In Stock : 31
                                        1 : -
                                        Knowles CI-22746-000
                                        Mfr. Part #
                                        CI-22746-000
                                        Twicea Part #
                                        427-54-CI-22746-000                                         		Knowles
                                        Speakers & Transducers Balanced Armature Speaker
                                        Datasheet Compare
                                        37 In Stock
                                          Min.:1
                                          Mult.:1
                                          		 8 Weeks - Rectangular Tray 2011 CI 0.373Lx0.283W 9.47mmx7.18mm Active 1 (Unlimited) Solder Pads Receiver, Balanced Armature 4.1mm 5.5kHz 120Ohm 200Hz~5.5kHz Top 131.50 Sensitivity 4.1mm 0.165 4.19mm - - RoHS Compliant
                                          CI-22746-000
                                          CI-22746-000

                                          427-54-CI-22746-000 Knowles
                                          RoHS :
                                          Package : -
                                          In Stock : 37
                                          1 : -

                                          Audio Products

                                          Speakers definition: A Speaker is a device which converts an electrical audio signal into a corresponding sound. Speakers are typically housed in a speaker enclo... Speakers Product Listing: EF-21763-000,EF-28378-000,EF-26161-116,EF-26635-000,BK-21839-000.Audio Products type:Accessories(132142),Alarms, Buzzers, and Sirens(6697),Speakers(4224),Microphones(2207),Vacuum Tubes(1481) .Speakers has 959 pieces of spot stock price information, you can click the "RFQ" button to confirm the inventory and price with the Twicea.