Electroacoustical components

Hearing aid components & accessories


• Coils feature a polyurethane coating for optimal environmental protection
• 5200 series SMT telecoil are readily available in tape-and-reel packaging for pick-and-place installation
• 5300 series active telecoils feature RFI suppression

Telecoils can be designed as passive, surface mount, active gain, and radio frequency solutions — including improved EMI performance on active units. Various electrical and mounting configurations are available.

Image Series Dimensions Features
5100 passive series 5100 passive series 1.2mm D – 3.21mm D x 4.94mm L – 8.03mm L
  • Various electrical parameters available
  • Various sizes available
  • Solid or Litz wire leads
  • Polyurethane coating on coil
  • Radial or axial lead configuration
5300 active series 5300 active series 5.33mm x 2.54mm x 3.32mm (.210in x .100in x .131in)
  • RFI (Radio Frequency Interference) suppression
  • Integrated preamplifier
  • ESD protection
  • Plastic sleeve to protect coil
  • Optional sleeveless version available
  • Insulated leads


• Knowles’ pushbutton product line features multiple driver and cap configurations to accommodate various tactile responses and activation forces
• “Overtravel” design on Knowles’ 2900 series pushbutton enables electrical contact prior to full pushbutton travel for superior mechanical actuation
• 2005 series slide switch features a fully enclosed housing which minimizes risk of corrosion and contamination
• Custom design capabilities are available through Knowles’ research and development team for advanced applications that may have special requirements

Knowles offers a diverse group of switch designs to support multiple design ideas depending on your application. Actuating mechanisms range from traditional momentary pushbutton to toggle or custom switch design.

Image Series Dimensions Features
2005 slide switch series 2005 slide switch series 5.72mm x 3.25mm x 4.22mm (.225in x .128in x .166in)
  • Vertical or horizontal leads
  • Standards meet or exceed those of MIL-Q-9858A
  • Make-before-break contacts
  • Switch can be color coded
  • Two driver heights available
2800 push button switch series 2800 push button switch series 2.54mm dia x 3.19mm
  • Flanged and unflanged options available
  • SPST normally open switch
  • Optional knob extension (cap)
  • Gold-plated contacts and leads
2900 ultra miniature push button series 2900 ultra miniature push button series 1.90mm dia x 3.00mm
  • 1.90mm diameter is smallest on market
  • Overtravel allows for mechanical activation applications with greater tolerance
  • Round flexible leads
  • Oversize knob caps available

Programming accessories

New SMT style sockets are compatible with existing socket cap designs, and are available in tape-and-reel packaging for pick-and-place installation
Private labeling available for all cable product lines
Custom cable development available for advanced or non-traditional programming interface applications
Knowles provides a vast array of accessory solutions to interface between any hearing device and remote programming devices. Programming cables can be designed to suit standard or unique interfaces, including SMT socket styles.

Image Series Dimensions Features
0009 connector sockets 0009 connector sockets 2.1mm x 2.2mm (3.15 Flange Dia)
  • Compatible with all standard cable assemblies
  • 3-, 4- or 5-pin terminals available
  • Multiple socket cap styles and colors available
  • Insulated leads
  • Terminal flexible or rigid
  • Socket covers available in different styles and colors
009P programming cables 009P programming cables 50cm L, 75cm L, 150cm L, 200cm L, or 250cm L
  • Industry standard micro-plug
  • Gold plated contacts provide high durability
  • High quality flexible cables
  • High quality strain relief, test to 10,000 bends
  • Optional color dot marking
  • Choice of plug colors
  • Choice of mini-DIN styles
9201 programming flex grip with socket cables 9201 programming flex grip with socket cables 25mm L or 200mm L
  • Compatible replacement parts for all current flex programming systems
  • Improved design increases flexibility and reduces contact breaks
  • Space saving solution: no socket in the hearing aid
  • The battery and the battery door need not be removed during programming of the hearing aid

Integrated faceplate module

• Supports full range of ITE and BTE designs
• System assembly and integration available
• 3 and 4 terminal programming versions available
• Boot design protects battery
• Common and industry standard battery door
• Custom pcb designs available

Our new integrated faceplate module simplifies manufacturing and servicing by integrating the pushbutton, battery door, programming block, and microphone. The assembly firmly attaches and easily detaches from the faceplate with one removal tool.