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

Image Part Number Description / PDF Quantity Rfq
54121-105051100LF

54121-105051100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 5POS 0.1 STACK T/H

0

54111-108031250LF

54111-108031250LF

Storage & Server IO (Amphenol ICC)

CONN HDR 3POS 0.1 STACK T/H

0

20021814-10040T1LF

20021814-10040T1LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.05 STACK T/H

0

98426-T13-10-222LF

98426-T13-10-222LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.079 STACK T/H

0

59132-T36-06-100LF

59132-T36-06-100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.079 STACK T/H

0

54122-811402300LF

54122-811402300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H

0

76745-1CU-50LF

76745-1CU-50LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.1 STACK T/H

0

54122-811642300LF

54122-811642300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 64POS 0.1 STACK T/H

0

54122-106061150LF

54122-106061150LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H

0

54242-107101350LF

54242-107101350LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK SMD

0

54242-107500950LF

54242-107500950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.1 STACK SMD

0

59202-F32-15P066LF

59202-F32-15P066LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

59362-T2610U036LF

59362-T2610U036LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.079 STACK T/H

0

59202-G34-05-105LF

59202-G34-05-105LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.079 STACK SMD

0

54122-107301100LF

54122-107301100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.1 STACK T/H

0

10065491-001TRLF

10065491-001TRLF

Storage & Server IO (Amphenol ICC)

CONN HDR SMT

0

98426-G13-17-237LF

98426-G13-17-237LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.079 STACK T/H

0

54122-108120650LF

54122-108120650LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-110082100LF

54122-110082100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

54122-106041100LF

54122-106041100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 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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