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

Image Part Number Description / PDF Quantity Rfq
54111-107021550LF

54111-107021550LF

Storage & Server IO (Amphenol ICC)

CONN HDR 2POS 0.1 STACK T/H

0

20021831-04012T1LF

20021831-04012T1LF

Storage & Server IO (Amphenol ICC)

1.27 BTB STACK HD VT SMT

0

54242-806141000LF

54242-806141000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK SMD

0

98426-G13-22-237LF

98426-G13-22-237LF

Storage & Server IO (Amphenol ICC)

CONN HDR 44POS 0.079 STACK T/H

0

55500-109LF

55500-109LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

54122-112402000LF

54122-112402000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H

0

54242-806401200LF

54242-806401200LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK SMD

0

59202-S34-06-150LF

59202-S34-06-150LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

59202-T36-05-040LF

59202-T36-05-040LF

Storage & Server IO (Amphenol ICC)

MINITEK 11 2MM UNSHROUDE

0

54122-109041650LF

54122-109041650LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H

0

54121-407071050LF

54121-407071050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 7POS 0.1 STACK T/H TIN

0

54122-809121650LF

54122-809121650LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

59132-F34-03-075

59132-F34-03-075

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

54112-805101100LF

54112-805101100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

75970-526-08LF

75970-526-08LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H GOLD

0

54122-807040800LF

54122-807040800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H

0

54122-408401450LF

54122-408401450LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H TIN

0

54112-103120800LF

54112-103120800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

76745-157-26LF

76745-157-26LF

Storage & Server IO (Amphenol ICC)

CONN HDR 26POS 0.1 STACK T/H

0

54112-110122150LF

54112-110122150LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 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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