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

Image Part Number Description / PDF Quantity Rfq
54112-109421950LF

54112-109421950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 42POS 0.1 STACK T/H

0

54111-111102400LF

54111-111102400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

98426-G13-14-222LF

98426-G13-14-222LF

Storage & Server IO (Amphenol ICC)

CONN HDR 28POS 0.079 STACK T/H

0

54122-107720800LF

54122-107720800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

54121-809201800LF

54121-809201800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54112-110201750LF

54112-110201750LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54122-118161850RLF

54122-118161850RLF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 0.1 STACK T/H

0

54121-109360800LF

54121-109360800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H

0

54122-106200800LF

54122-106200800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

77709-124LF

77709-124LF

Storage & Server IO (Amphenol ICC)

CONN HDR 9POS 0.1 STACK T/H

0

54121-407081300LF

54121-407081300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H TIN

0

54122-802200650LF

54122-802200650LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54112-108101500LF

54112-108101500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

54122-110221000LF

54122-110221000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 22POS 0.1 STACK T/H

0

54122-811082540LF

54122-811082540LF

Storage & Server IO (Amphenol ICC)

BERGSTIK CONN STACKER

0

59202-T40-15-047LF

59202-T40-15-047LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

59202-T36-25A113LF

59202-T36-25A113LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54112-109481700LF

54112-109481700LF

Storage & Server IO (Amphenol ICC)

CONN HDR 48POS 0.1 STACK T/H

0

76745-162-06LF

76745-162-06LF

Storage & Server IO (Amphenol ICC)

BERGSTIK STR DR-DEROG

0

54111-405051250LF

54111-405051250LF

Storage & Server IO (Amphenol ICC)

CONN HDR 5POS 0.1 STACK T/H TIN

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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