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

Image Part Number Description / PDF Quantity Rfq
54122-807181150LF

54122-807181150LF

Storage & Server IO (Amphenol ICC)

CONN HDR 18POS 0.1 STACK T/H

0

54111-405051000LF

54111-405051000LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54242-108401600LF

54242-108401600LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK SMD

0

54112-811060850LF

54112-811060850LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H

0

54112-112142100LF

54112-112142100LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54121-108141700LF

54121-108141700LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

54112-110101400LF

54112-110101400LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-109081400LF

54122-109081400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

54122-809161400LF

54122-809161400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 0.1 STACK T/H

0

54122-105240800LF

54122-105240800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 24POS 0.1 STACK T/H

0

20021831-04516T4LF

20021831-04516T4LF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 0.05 STACK SMD

0

54122-411242500LF

54122-411242500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 24POS 0.1 STACK T/H TIN

0

98426-S01-10-105LF

98426-S01-10-105LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.079 STACK T/H

0

54112-810241800LF

54112-810241800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 24POS 0.1 STACK T/H

0

54121-111082150LF

54121-111082150LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

98426-S04-25-133LF

98426-S04-25-133LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.079 STACK T/H

0

98426-G13-04-237LF

98426-G13-04-237LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.079 STACK T/H

0

98426-G03-25-118LF

98426-G03-25-118LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.079 STACK T/H

0

20021832-05036C8LF

20021832-05036C8LF

Storage & Server IO (Amphenol ICC)

1.27 BTB STACK HD VT SMT

0

54122-105160900LF

54122-105160900LF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 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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