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

Image Part Number Description / PDF Quantity Rfq
76745-312-12LF

76745-312-12LF

Storage & Server IO (Amphenol ICC)

BERGSTIK-DEROG

0

76745-106-26LF

76745-106-26LF

Storage & Server IO (Amphenol ICC)

CONN HDR 26POS 0.1 STACK T/H

0

54122-811102000LF

54122-811102000LF

Storage & Server IO (Amphenol ICC)

BERGSTIK CONN STACKER

0

54121-808161300LF

54121-808161300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 16POS 0.1 STACK T/H

0

59202-G28-12A051LF

59202-G28-12A051LF

Storage & Server IO (Amphenol ICC)

CONN HDR 24POS 0.079 STACK SMD

800

20021832-05004C4LF

20021832-05004C4LF

Storage & Server IO (Amphenol ICC)

MINITEK 127 HEADER

0

54111-406061450LF

54111-406061450LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H TIN

0

54112-107541100LF

54112-107541100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 54POS 0.1 STACK T/H

0

10121036-S04-145LF

10121036-S04-145LF

Storage & Server IO (Amphenol ICC)

MTK STK HDR 2X4

0

54122-403161000LF

54122-403161000LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-107081000LF

54122-107081000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

54122-111721650LF

54122-111721650LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

54112-109101800LF

54112-109101800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

54121-110361750LF

54121-110361750LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H

0

87690-115RLF

87690-115RLF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

54122-803161000LF

54122-803161000LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54121-108091600LF

54121-108091600LF

Storage & Server IO (Amphenol ICC)

CONN HDR 9POS 0.1 STACK T/H

0

54121-104360800LF

54121-104360800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H

0

54111-409261800LF

54111-409261800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 26POS 0.1 STACK T/H TIN

0

54122-110721900LF

54122-110721900LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 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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