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

Image Part Number Description / PDF Quantity Rfq
98426-G12-17-210LF

98426-G12-17-210LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.079 STACK T/H

0

76745-809-12LF

76745-809-12LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

20021832-06526C4LF

20021832-06526C4LF

Storage & Server IO (Amphenol ICC)

1.27 BTB STK VT SMT

0

76745-1DA-32LF

76745-1DA-32LF

Storage & Server IO (Amphenol ICC)

CONN HDR 32POS 0.1 STACK T/H

0

54242-109101400LF

54242-109101400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK SMD

0

54112-104100800LF

54112-104100800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

76745-1CP-20LF

76745-1CP-20LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

20021832-06004T4LF

20021832-06004T4LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.05 STACK SMD

0

20021833-08008C1LF

20021833-08008C1LF

Storage & Server IO (Amphenol ICC)

1.27 BTB STACK HD VT SMT

0

54121-403061000LF

54121-403061000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H TIN

0

54121-103300800LF

54121-103300800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.1 STACK T/H

0

59132-T34-17-086LF

59132-T34-17-086LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

54121-806021000LF

54121-806021000LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-106040950RLF

54122-106040950RLF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H

0

54121-424053180LF

54121-424053180LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

20021831-04520T4LF

20021831-04520T4LF

Storage & Server IO (Amphenol ICC)

1.27 BTB STACK HD VT SMT

0

54121-409361550LF

54121-409361550LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H TIN

0

54111-106040850LF

54111-106040850LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H

0

54112-826343750LF

54112-826343750LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.1 STACK T/H

0

75970-504-25LF

75970-504-25LF

Storage & Server IO (Amphenol ICC)

CONN HDR 25POS 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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