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

Image Part Number Description / PDF Quantity Rfq
54122-806481050LF

54122-806481050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 48POS 0.1 STACK T/H

0

54121-407021500LF

54121-407021500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 2POS 0.1 STACK T/H TIN

0

54112-112062500LF

54112-112062500LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-110301350LF

54122-110301350LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.1 STACK T/H

0

54122-110081550LF

54122-110081550LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

54122-116502000LF

54122-116502000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.1 STACK T/H

0

59202-F28-11-075LF

59202-F28-11-075LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54121-810101500LF

54121-810101500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

20021834-09030T1LF

20021834-09030T1LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.05 STACK SMD

0

54122-409261750LF

54122-409261750LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

20021832-07006T1LF

20021832-07006T1LF

Storage & Server IO (Amphenol ICC)

1.27 BTB STK VT SMT

0

54121-109361500LF

54121-109361500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H

0

98426-G06-10-148LF

98426-G06-10-148LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.079 STACK T/H

0

59202-K32-22-064LF

59202-K32-22-064LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54122-112322400LF

54122-112322400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 32POS 0.1 STACK T/H

0

54112-109481850LF

54112-109481850LF

Storage & Server IO (Amphenol ICC)

CONN HDR 48POS 0.1 STACK T/H

0

54121-407031300LF

54121-407031300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 3POS 0.1 STACK T/H TIN

0

54122-110121900LF

54122-110121900LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

54122-113082400LF

54122-113082400LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-411262550LF

54122-411262550LF

Storage & Server IO (Amphenol ICC)

CONN HDR 26POS 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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