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

Image Part Number Description / PDF Quantity Rfq
54121-803100800LF

54121-803100800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

54112-811121200LF

54112-811121200LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

54122-105720950LF

54122-105720950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

54122-409061550LF

54122-409061550LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H TIN

0

59112-S28-25-058R

59112-S28-25-058R

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

54122-111080850RLF

54122-111080850RLF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54112-807051300LF

54112-807051300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 0.1 STACK T/H

0

54121-810362150LF

54121-810362150LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H

0

54122-810081600LF

54122-810081600LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

54122-107140800LF

54122-107140800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

75970-590R04LF

75970-590R04LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H GOLD

0

54111-807051000LF

54111-807051000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 5POS 0.1 STACK T/H

0

54121-405140950LF

54121-405140950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H TIN

0

54122-116302000LF

54122-116302000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.1 STACK T/H

0

76745-1DA-28LF

76745-1DA-28LF

Storage & Server IO (Amphenol ICC)

CONN HDR 28POS 0.1 STACK T/H

0

54121-811121750LF

54121-811121750LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

54111-806361300LF

54111-806361300LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-409241750LF

54122-409241750LF

Storage & Server IO (Amphenol ICC)

CONN HDR 24POS 0.1 STACK T/H TIN

0

98426-S16-06-297LF

98426-S16-06-297LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.079 STACK T/H

0

54112-109461700LF

54112-109461700LF

Storage & Server IO (Amphenol ICC)

CONN HDR

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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