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

Image Part Number Description / PDF Quantity Rfq
54121-806021065LF

54121-806021065LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-107281250LF

54122-107281250LF

Storage & Server IO (Amphenol ICC)

CONN HDR 28POS 0.1 STACK T/H

0

59112-F38-02-146R

59112-F38-02-146R

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

20021832-05020C8LF

20021832-05020C8LF

Storage & Server IO (Amphenol ICC)

1.27 BTB STACK HD VT SMT

0

54112-108241500LF

54112-108241500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 24POS 0.1 STACK T/H

0

54122-112720800LF

54122-112720800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

59202-G40-02-151LF

59202-G40-02-151LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.079 STACK SMD

0

98426-G01-10-105LF

98426-G01-10-105LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.079 STACK T/H

0

98426-G09-08-180LF

98426-G09-08-180LF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 0.079 STACK T/H

0

76745-1CT-06LF

76745-1CT-06LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H

0

54121-402110800LF

54121-402110800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 11POS 0.1 STACK T/H TIN

0

54122-110202150LF

54122-110202150LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54112-812242400LF

54112-812242400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 24POS 0.1 STACK T/H

0

59112-T36-03-115LF

59112-T36-03-115LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.079 STACK T/H

0

59112-G28-16-050LF

59112-G28-16-050LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

69057-014TC

69057-014TC

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54242-103360960LF

54242-103360960LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-805061100LF

54122-805061100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H

0

54122-101720800LF

54122-101720800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

54112-805220850LF

54112-805220850LF

Storage & Server IO (Amphenol ICC)

CONN HDR 22POS 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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