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

Image Part Number Description / PDF Quantity Rfq
442-40-228-00-591000

442-40-228-00-591000

Mill-Max

CONN HDR 28POS 0.1 STACK T/H TIN

0

342-90-101-00-594000

342-90-101-00-594000

Mill-Max

CONN HDR 1POS 0.1 STACK T/H

0

342-10-153-00-592000

342-10-153-00-592000

Mill-Max

CONN HDR 53POS 0.1 STACK T/H

0

342-10-121-00-592000

342-10-121-00-592000

Mill-Max

CONN HDR 21POS 0.1 STACK T/H

0

342-90-140-00-592000

342-90-140-00-592000

Mill-Max

CONN HDR 40POS 0.1 STACK T/H

0

342-90-146-00-592000

342-90-146-00-592000

Mill-Max

CONN HDR 46POS 0.1 STACK T/H

0

342-90-115-00-591000

342-90-115-00-591000

Mill-Max

CONN HDR 15POS 0.1 STACK T/H

0

342-40-158-00-594000

342-40-158-00-594000

Mill-Max

CONN HDR 58POS 0.1 STACK T/H TIN

0

442-90-242-00-592000

442-90-242-00-592000

Mill-Max

CONN HDR 42POS 0.1 STACK T/H

0

342-90-106-00-592000

342-90-106-00-592000

Mill-Max

CONN HDR 6POS 0.1 STACK T/H

0

442-10-250-00-593000

442-10-250-00-593000

Mill-Max

CONN HDR 50POS 0.1 STACK T/H

0

342-40-136-00-594000

342-40-136-00-594000

Mill-Max

CONN HDR 36POS 0.1 STACK T/H TIN

0

442-10-258-00-592000

442-10-258-00-592000

Mill-Max

CONN HDR 58POS 0.1 STACK T/H

0

442-90-262-00-592000

442-90-262-00-592000

Mill-Max

CONN HDR 62POS 0.1 STACK T/H

0

442-40-230-00-592000

442-40-230-00-592000

Mill-Max

CONN HDR 30POS 0.1 STACK T/H TIN

0

442-90-258-00-592000

442-90-258-00-592000

Mill-Max

CONN HDR 58POS 0.1 STACK T/H

0

442-40-264-00-591000

442-40-264-00-591000

Mill-Max

CONN HDR 64POS 0.1 STACK T/H TIN

0

442-90-250-00-593000

442-90-250-00-593000

Mill-Max

CONN HDR 50POS 0.1 STACK T/H

0

342-90-127-00-591000

342-90-127-00-591000

Mill-Max

CONN HDR 27POS 0.1 STACK T/H

0

342-40-112-00-592000

342-40-112-00-592000

Mill-Max

CONN HDR 12POS 0.1 STACK T/H TIN

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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