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

Image Part Number Description / PDF Quantity Rfq
54122-112162500LF

54122-112162500LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54121-110111700LF

54121-110111700LF

Storage & Server IO (Amphenol ICC)

CONN HDR 11POS 0.1 STACK T/H

0

54122-408141270LF

54122-408141270LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54776-604-20LF

54776-604-20LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54112-809062000LF

54112-809062000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H

0

63444-001TC

63444-001TC

Storage & Server IO (Amphenol ICC)

CONN HDR

0

59202-T38-23A123LF

59202-T38-23A123LF

Storage & Server IO (Amphenol ICC)

CONN HDR 46POS 0.079 STACK SMD

0

54112-803080900LF

54112-803080900LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

54121-807151500LF

54121-807151500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 15POS 0.1 STACK T/H

0

77709-125LF

77709-125LF

Storage & Server IO (Amphenol ICC)

CONN HDR 7POS 0.1 STACK T/H

0

77709-727LF

77709-727LF

Storage & Server IO (Amphenol ICC)

CONN HDR 9POS 0.1 STACK T/H GOLD

0

54121-111362000LF

54121-111362000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H

0

54122-406100850LF

54122-406100850LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

59112-S32-02-080LF

59112-S32-02-080LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

59202-H28-05A060LF

59202-H28-05A060LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.079 STACK SMD

0

98426-G13-25-237LF

98426-G13-25-237LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.079 STACK T/H

0

54122-103160800LF

54122-103160800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 0.1 STACK T/H

0

54112-109141800LF

54112-109141800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

54122-105200800LF

54122-105200800LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-109061200LF

54122-109061200LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 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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