XSLS Series

XSLS Series

0.25 mm Pitch, Stack Mating, Ultra-Compact

Our XSLS Series is the industry’s most miniature connector with a 0.25 mm pitch and stack mating, which saves more space on the board.

Mating List

Product List

Product List & Technical Data (CAD files)

Key Features

Industry’s Smallest Pitch (0.25 mm) Space Saving

Industry’s Smallest Pitch (0.25 mm) Space Saving

  • Compact connector with mated height of 1.44 mm and mating width of 3.05 mm
  • Effective mating length is 0.31 mm
Excellent Transmission Characteristics Enable Flexible Connection Layouts

Excellent Transmission Characteristics Enable Flexible Connection Layouts

  • Applicable cable: AWG#44/46
  • Highly flexible cable allows flexible connection layout between boards.
  • The cable harness can be passed through thin tube of φ2.7 mm at the hinge area, etc., which expands the user’s board design.
  • The bottom surface of the connector is covered with resin, which allows wiring patterns directly under the connector.

Secure & Reliable Connection with High Transmission Characteristics

  • The signal lines are soldered using pulse heating to ensure stable and reliable connections.
  • The board-side connector is surrounded by a metal shell to improve noise reduction, product strength, and to strengthen grounding.
  • Ground terminals are provided at multiple points to improve transmission and EMS characteristics.
  • A nickel barrier is placed on the board-side contact to prevent the solder from lifting.


Insulator Material[XSLS00] LCP (with glass fiber) UL94V-0 material, black color
[XSLS20] LCP (with inorganic filler) UL94V-0 material, black color
Contact MaterialCopper alloy
Contact FinishNickel-plated base, gold-plated finish
Fixture MaterialCopper alloy
Fixture FinishNickel-plated base, gold-plated finish
Shell MaterialStainless steel
Shell FinishNickel-plated base, gold-plated finish
Rated Current0.3 A per contact
Contact Resistance100 mΩ or less
Withstand Voltage100 V AC, 1 minute
Insulation Resistance100 V DC, 50 mΩ min.
Operating Temperature Range-40 to +85 °C
Insertion/Extraction Durability30 times
Applicable CableAWG#44/46 (max. outer diameter: 0.24 mm)
Micro coaxial cables

Product List & Technical Data

Scroll horizontally to view all table content.

Part numberCurrent ratingPitchNo. of contactsTypeConnection typeRecommended cableNo. of packagingPackaging styleRoHSOther featuresProduct drawingSpecification3D-CAD
XSLS00-30-A0.3 A0.25 mm30Receptacle (PCB side)Stacking500Embossed tapeCompliantViewViewDownloadDownload
XSLS00-30-B0.3 A0.25 mm30Receptacle (PCB side)Stacking3,000Embossed tapeCompliantViewViewDownloadDownload
XSLS00-30-C0.3 A0.25 mm30Receptacle (PCB side)Stacking5,000Embossed tapeCompliantViewViewDownloadDownload
XSLS00-40-A0.3 A0.25 mm40Receptacle (PCB side)Stacking500Embossed tapeCompliantViewViewDownloadDownload
XSLS00-40-B0.3 A0.25 mm40Receptacle (PCB side)Stacking3,000Embossed tapeCompliantViewViewDownloadDownload
XSLS00-40-C0.3 A0.25 mm40Receptacle (PCB side)Stacking5,000Embossed tapeCompliantViewViewDownloadDownload
XSLS00-52-B0.3 A0.25 mm52Receptacle (PCB side)Stacking3,000Embossed tapeCompliantViewViewDownloadDownload
XSLS01-30-A0.3 A0.25 mm30Receptacle (PCB side)Stacking500Embossed tapeCompliantViewViewDownloadDownload
XSLS01-30-B0.3 A0.25 mm30Receptacle (PCB side)Stacking3,000Embossed tapeCompliantViewViewDownloadDownload
XSLS01-30-C0.3 A0.25 mm30Receptacle (PCB side)Stacking5,000Embossed tapeCompliantViewViewDownloadDownload
XSLS01-40-A0.3 A0.25 mm40Receptacle (PCB side)Stacking500Embossed tapeCompliantViewViewDownloadDownload
XSLS01-40-B0.3 A0.25 mm40Receptacle (PCB side)Stacking3,000Embossed tapeCompliantViewViewDownloadDownload
XSLS01-40-C0.3 A0.25 mm40Receptacle (PCB side)Stacking5,000Embossed tapeCompliantViewViewDownloadDownload
XSLS20-300.3 A0.25 mm30Plug (Cable side)StackingAWG
10,000Embossed tapeCompliantCable connection: SolderingViewViewDownloadDownload
XSLS20-400.3 A0.25 mm40Plug (Cable side)StackingAWG
10,000Embossed tapeCompliantCable connection: SolderingViewViewDownloadDownload
XSLS20-40-A0.3 A0.25 mm40Plug (Cable side)StackingAWG
1,000Embossed tapeCompliantCable connection: SolderingViewViewDownloadDownload
XSLS20-40-B0.3 A0.25 mm40Plug (Cable side)StackingAWG
2,000Embossed tapeCompliantCable connection: SolderingViewViewDownloadDownload
XSLS20-52-B0.3 A0.25 mm52Plug (Cable side)StackingAWG
2,000Embossed tapeCompliantCable connection: SolderingViewViewDownloadDownload

Standards, Compliance, and Test Results

Standard Name

Download Transmission Characteristics Data

To download Transmission Characteristics Data, complete the form below and press the “Send & Download” button.

Case Studies


With another brand’s connector and FPC, noise interference was occurring, and due to its structure, a suitable wiring connection was impossible.


The XSLS series metal shell and multiple ground terminals reduced the noise. The flexibility of the micro coaxial cables realized ideal wiring.


Flexible Customization & Consultation

Flexible Customization & Consultation

Renowned for industry-leading expertise in floating connectors, we can assist you through the entire process of creating custom solutions. We have many years of experience in connector peripheral development, design, and manufacturing.

Top-Quality Products Made in Japan

Top-Quality Products Made in Japan

A fully automated production line for floating connectors is now in operation with a Class 100,000 cleanroom at our plant located in Japan’s Yamanashi Prefecture.

ISO & IATF Certified

ISO & IATF Certified

We are ISO9001/14001 and IATF16949 certified and registered.

Custom Solutions

Custom Solutions

With technology cultivated over 60 years, we pursue miniature, reliable and high functionality

Transmission Simulation

Transmission Simulation Data

Our development department can replicate similar customer conditions and provide you with accurate simulation data.

Custom Harness Support

Custom Harness Support

KEL develops custom-made harnesses to meet your specifications.