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

Image Part Number Description / PDF Quantity Rfq
90599-049

90599-049

Storage & Server IO (Amphenol ICC)

MINITEK II RAIL-ROAD HDR

0

54112-807101000LF

54112-807101000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

59112-G28-22-055

59112-G28-22-055

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

54122-809161600LF

54122-809161600LF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 0.1 STACK T/H

0

54122-414081400LF

54122-414081400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H TIN

0

54122-108341400LF

54122-108341400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.1 STACK T/H

0

54112-109081700LF

54112-109081700LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

59362-T32-06-072LF

59362-T32-06-072LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54242-104500950LF

54242-104500950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.1 STACK SMD

0

54242-516202600LF

54242-516202600LF

Storage & Server IO (Amphenol ICC)

BERGSTIK HDR DB DR SMT

0

54122-407041500LF

54122-407041500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H TIN

0

54112-106161000LF

54112-106161000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 0.1 STACK T/H

0

54112-405201250LF

54112-405201250LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H TIN

0

54111-807201300LF

54111-807201300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54112-118481950LF

54112-118481950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 48POS 0.1 STACK T/H

0

76745-323-72LF

76745-323-72LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H TIN

0

98426-S10-17-188LF

98426-S10-17-188LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.079 STACK T/H

0

54121-107361150LF

54121-107361150LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H

0

76745-110-72LF

76745-110-72LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

54122-406061050LF

54122-406061050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 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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