Rectangular Connectors - Board Spacers, Stackers (Board to Board)

Image Part Number Description / PDF Quantity Rfq
54122-112142400LF

54122-112142400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

98426-S03-17-118LF

98426-S03-17-118LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.079 STACK T/H

0

54111-408061450LF

54111-408061450LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H TIN

0

54122-807201300LF

54122-807201300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54122-107261130LF

54122-107261130LF

Storage & Server IO (Amphenol ICC)

BERGSTIK CONN STACKER

0

92813-038TRLF

92813-038TRLF

Storage & Server IO (Amphenol ICC)

CONN HDR 28POS 0.079 STACK SMD

0

54122-810201700LF

54122-810201700LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54112-103061100LF

54112-103061100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H

0

54121-410042250LF

54121-410042250LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H TIN

0

54121-403021000LF

54121-403021000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 2POS 0.1 STACK T/H TIN

0

54121-816141550LF

54121-816141550LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

54112-109261700LF

54112-109261700LF

Storage & Server IO (Amphenol ICC)

CONN HDR 26POS 0.1 STACK T/H

0

54122-809201600LF

54122-809201600LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54112-408061500LF

54112-408061500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H TIN

0

54111-109061700LF

54111-109061700LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H

0

59202-T28-07A065LF

59202-T28-07A065LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

10004337-120HLF

10004337-120HLF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54111-809201800LF

54111-809201800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

59202-T40-15-155LF

59202-T40-15-155LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54122-804720800LF

54122-804720800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

Rectangular Connectors - Board Spacers, Stackers (Board to Board)

1. Overview

Rectangular board spacers and stackers are interconnect solutions designed to establish mechanical and electrical connections between two or more printed circuit boards (PCBs). These connectors maintain precise spacing while enabling signal/power transmission. Their importance in modern electronics includes enabling compact designs, modular system architectures, and reliable high-speed data transfer in applications ranging from consumer devices to industrial equipment.

2. Main Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
Board SpacersFixed pitch, non-mating interconnects with insulating pillarsSmartphone mid-frames, IoT sensor modules
Stacking ConnectorsSelf-mating design with compressible contactsEmbedded computing boards, FPGA development kits
High-Speed StackersControlled impedance, low crosstalk design5G base stations, network switches
Compliant Pin StackersPress-fit terminations for Z-axis complianceAutomotive radar systems, medical imaging devices

3. Structure and Components

Typical construction includes:

  • Insulating housing (LCP/PBT with UL94 V-0 rating)
  • Phosphor bronze or beryllium copper contacts
  • Gold-plated contact areas (0.5-3 m thickness)
  • Polarization keying to prevent misalignment
  • Integrated locking mechanisms (latches/snap-fits)
  • Optional EMI shielding layers

4. Key Technical Specifications

ParameterTypical RangeImportance
Current Rating0.5A - 5A per contactDictates power delivery capability
Contact Resistance5-20m Impacts signal integrity
Dielectric Strength500V - 2500V ACEnsures electrical safety
Operating Temperature-55 C to +125 CDetermines environmental robustness
Insertion Force0.5N - 5N per contactAffects assembly process
Mating Cycles500 - 10,000 cyclesDefines service life expectancy

5. Application Fields

  • Telecommunications: Server backplanes, 5G NR radios
  • Industrial Automation: PLC modules, CNC controller stacks
  • Consumer Electronics: Foldable device hinge connectors
  • Medical Devices: MRI system detector arrays
  • Automotive: ADAS sensor stacking modules

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
TE ConnectivitySMART Board Stacker12 Gbps capability, self-aligning
MolexImpel High-Speed Connector25+ Gbps, floating compliance
AmphenolCBGA InterposerMicro BGA footprint compatibility
JAE ElectronicsDF59 Series0.4mm pitch, 0.3mm stack height

7. Selection Recommendations

Key considerations:

  • Electrical requirements vs. contact density needs
  • Stack height tolerance stack-up analysis
  • Thermal expansion coefficient matching
  • Field serviceability requirements
  • Automated optical inspection (AOI) compatibility

Case Study: In automotive camera module design, compliant pin stackers reduced assembly time by 40% while maintaining ISO 16750 vibration compliance.

8. Industry Trends

  • Migration to 0.3mm pitch connectors for mobile applications
  • Integration of coaxial contacts for RF board-to-board links
  • Adoption of additive manufacturing for complex shapes
  • Increased adoption of press-fit terminations in harsh environments
  • Development of hybrid optical-electrical stacking solutions
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