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

Image Part Number Description / PDF Quantity Rfq
75970-1AK-12LF

75970-1AK-12LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

54112-109401250LF

54112-109401250LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H

0

59112-T32-12-076LF

59112-T32-12-076LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54112-103280800LF

54112-103280800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 28POS 0.1 STACK T/H

0

54122-108721300LF

54122-108721300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

59202-F30-10-099LF

59202-F30-10-099LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54121-409061800LF

54121-409061800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H TIN

0

20021832-04008T8LF

20021832-04008T8LF

Storage & Server IO (Amphenol ICC)

1.27 BTB STK VT SMT

0

98426-S16-05-297LF

98426-S16-05-297LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.079 STACK T/H

0

98426-G01-25-105LF

98426-G01-25-105LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.079 STACK T/H

0

54122-101080600RLF

54122-101080600RLF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54111-809062100LF

54111-809062100LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54112-110301950LF

54112-110301950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.1 STACK T/H

0

54121-112362500LF

54121-112362500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H

0

54121-409031550LF

54121-409031550LF

Storage & Server IO (Amphenol ICC)

CONN HDR 3POS 0.1 STACK T/H TIN

0

54122-111302200LF

54122-111302200LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.1 STACK T/H

0

54111-106060950LF

54111-106060950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H

0

59112-F32-20-076LF

59112-F32-20-076LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

54122-106100850LF

54122-106100850LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

54122-116402500LF

54122-116402500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 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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