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

Image Part Number Description / PDF Quantity Rfq
59202-H26-06A054LF

59202-H26-06A054LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54122-109121150LF

54122-109121150LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

20021834-07030T4LF

20021834-07030T4LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.05 STACK SMD

0

59132-H34-10-089LF

59132-H34-10-089LF

Storage & Server IO (Amphenol ICC)

MTK STK TH HDR

0

77709-128LF

77709-128LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H

0

98426-G03-17-118LF

98426-G03-17-118LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.079 STACK T/H

0

54122-408301300LF

54122-408301300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.1 STACK T/H TIN

0

92813-033LF

92813-033LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54242-105500950LF

54242-105500950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.1 STACK SMD

0

54122-409181450LF

54122-409181450LF

Storage & Server IO (Amphenol ICC)

CONN HDR 18POS 0.1 STACK T/H TIN

0

59112-R30-05-051LF

59112-R30-05-051LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.079 STACK T/H

0

54112-106341050LF

54112-106341050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.1 STACK T/H

0

54112-110441900LF

54112-110441900LF

Storage & Server IO (Amphenol ICC)

CONN HDR 44POS 0.1 STACK T/H

0

10066848-104LF

10066848-104LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

59112-T34-06-109LF

59112-T34-06-109LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.079 STACK T/H

0

59202-T28-05-060LF

59202-T28-05-060LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.079 STACK SMD

0

54112-107401100LF

54112-107401100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H

0

76745-376-16LF

76745-376-16LF

Storage & Server IO (Amphenol ICC)

BERGSTIK-DEROG

0

59112-G38-17-120

59112-G38-17-120

Storage & Server IO (Amphenol ICC)

CONN STACKER 34POS 2MM T/H

0

54122-811202300LF

54122-811202300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 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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