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

Image Part Number Description / PDF Quantity Rfq
54122-107341050LF

54122-107341050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.1 STACK T/H

0

54122-109202000LF

54122-109202000LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

59202-F34-04A096LF

59202-F34-04A096LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

59112-T28-10-050LF

59112-T28-10-050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.079 STACK T/H

0

54112-110101500LF

54112-110101500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

59202-F24-05A055LF

59202-F24-05A055LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.079 STACK SMD

0

59112-G30-06-066

59112-G30-06-066

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.079 STACK T/H

0

54112-112502500LF

54112-112502500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.1 STACK T/H

0

54121-403030950LF

54121-403030950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 3POS 0.1 STACK T/H TIN

0

54111-807061600LF

54111-807061600LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H

0

59132-G32-25-070

59132-G32-25-070

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.079 STACK T/H

0

76745-124-10LF

76745-124-10LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

98426-S10-04-188LF

98426-S10-04-188LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.079 STACK T/H

0

54122-110701800LF

54122-110701800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 70POS 0.1 STACK T/H

0

54122-103200800LF

54122-103200800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54122-810321350LF

54122-810321350LF

Storage & Server IO (Amphenol ICC)

CONN HDR 32POS 0.1 STACK T/H

0

54112-109501850LF

54112-109501850LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.1 STACK T/H

0

54122-106381000LF

54122-106381000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 38POS 0.1 STACK T/H

0

54122-106100800LF

54122-106100800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

59202-T36-13U115LF

59202-T36-13U115LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

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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