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

Image Part Number Description / PDF Quantity Rfq
54112-811302350LF

54112-811302350LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.1 STACK T/H

0

54122-810141400RLF

54122-810141400RLF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

54112-511041800LF

54112-511041800LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

75970-3BAA03LF

75970-3BAA03LF

Storage & Server IO (Amphenol ICC)

CONN HDR 3POS 0.1 STACK T/H TIN

0

59202-H26-04A054LF

59202-H26-04A054LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54121-403060950LF

54121-403060950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H TIN

0

59362-T2410U036LF

59362-T2410U036LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.079 STACK T/H

0

54122-106140800LF

54122-106140800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

54121-806141050LF

54121-806141050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

0

87690-719LF

87690-719LF

Storage & Server IO (Amphenol ICC)

CONN HDR 0.1 STACK T/H GOLD

0

59202-F34-10-070LF

59202-F34-10-070LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54122-408341400LF

54122-408341400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.1 STACK T/H TIN

0

20021833-07520T1LF

20021833-07520T1LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.05 STACK SMD

0

54242-807141250LF

54242-807141250LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK SMD

0

59202-T26-04-055LF

59202-T26-04-055LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

72307-168HLF

72307-168HLF

Storage & Server IO (Amphenol ICC)

CONN HDR 68POS 0.1 STACK T/H

0

54121-129043470LF

54121-129043470LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54121-408031600LF

54121-408031600LF

Storage & Server IO (Amphenol ICC)

CONN HDR 3POS 0.1 STACK T/H TIN

0

10066848-607LF

10066848-607LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

59132-G32-25-070LF

59132-G32-25-070LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.079 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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