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

Image Part Number Description / PDF Quantity Rfq
54122-112141850LF

54122-112141850LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

75970-130-10LF

75970-130-10LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

54112-105720950LF

54112-105720950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

92813-002LF

92813-002LF

Storage & Server IO (Amphenol ICC)

CONN STACKER

0

20021831-04006T4LF

20021831-04006T4LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.05 STACK SMD

0

54121-106360800LF

54121-106360800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H

0

77709-332LF

77709-332LF

Storage & Server IO (Amphenol ICC)

BERGSTIK

0

54121-816102500LF

54121-816102500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

54242-106481050LF

54242-106481050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 48POS 0.1 STACK SMD

0

54122-106040800LF

54122-106040800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H

0

54112-409241000LF

54112-409241000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 24POS 0.1 STACK T/H TIN

0

20021834-10540T4LF

20021834-10540T4LF

Storage & Server IO (Amphenol ICC)

BTB HD STACK SMT 1.27

0

54122-113402350RLF

54122-113402350RLF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H

0

59202-G28-25-081LF

59202-G28-25-081LF

Storage & Server IO (Amphenol ICC)

CONN STACKER 50POS 2MM SMD

0

54112-810201750LF

54112-810201750LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

98426-S12-10-210LF

98426-S12-10-210LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.079 STACK T/H

0

54121-405020800LF

54121-405020800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 2POS 0.1 STACK T/H TIN

0

59202-T32-02A085LF

59202-T32-02A085LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.079 STACK SMD

0

54122-128161250LF

54122-128161250LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

10065491-003TRLF

10065491-003TRLF

Storage & Server IO (Amphenol ICC)

CONN HDR SMT

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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