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

Image Part Number Description / PDF Quantity Rfq
54121-810081500LF

54121-810081500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

54111-406061300LF

54111-406061300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H TIN

0

59112-G28-25-055

59112-G28-25-055

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

98426-S06-17-148LF

98426-S06-17-148LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.079 STACK T/H

0

54112-809181000LF

54112-809181000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 18POS 0.1 STACK T/H

0

59202-F38-24P074LF

59202-F38-24P074LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54111-102050800LF

54111-102050800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 5POS 0.1 STACK T/H

0

54242-107161000LF

54242-107161000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 0.1 STACK SMD

0

54112-103100800LF

54112-103100800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

59202-G30-05-084LF

59202-G30-05-084LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.079 STACK SMD

0

54122-808261500LF

54122-808261500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 26POS 0.1 STACK T/H

0

54122-811401800LF

54122-811401800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H

0

54122-810401200LF

54122-810401200LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H

0

92813-040TRLF

92813-040TRLF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.079 STACK SMD

0

76745-159-50LF

76745-159-50LF

Storage & Server IO (Amphenol ICC)

HDR STR DR DB. 100 GP-2P-DEROG

0

54242-106500900LF

54242-106500900LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.1 STACK SMD

0

54111-109081405LF

54111-109081405LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

76745-157-22LF

76745-157-22LF

Storage & Server IO (Amphenol ICC)

CONN HDR 22POS 0.1 STACK T/H

0

76745-8DW-20LF

76745-8DW-20LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54112-109121400LF

54112-109121400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 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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