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

Image Part Number Description / PDF Quantity Rfq
54121-807041050LF

54121-807041050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H

474

861400101YD10712LF

861400101YD10712LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

54122-109721650LF

54122-109721650LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

54112-406141050LF

54112-406141050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H TIN

100

861400061YD1787LF

861400061YD1787LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.1 STACK T/H GOLD

0

76745-121R14LF

76745-121R14LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.1 STACK T/H

100

861400042YD10776LF

861400042YD10776LF

Storage & Server IO (Amphenol ICC)

CONN HDR 4POS 0.1 STACK T/H

0

54112-106081100LF

54112-106081100LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

54112-803500800LF

54112-803500800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.1 STACK T/H

0

54121-109041550LF

54121-109041550LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54122-804200800LF

54122-804200800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

54122-810241600LF

54122-810241600LF

Storage & Server IO (Amphenol ICC)

CONN HDR 24POS 0.1 STACK T/H

0

54112-516122300LF

54112-516122300LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

59112-T36-20-113LF

59112-T36-20-113LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.079 STACK T/H

0

59132-T36-15-095LF

59132-T36-15-095LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

59202-T24-04-066LF

59202-T24-04-066LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54122-113342500LF

54122-113342500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.1 STACK T/H

0

54122-107120950LF

54122-107120950LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

59202-T30-15-081LF

59202-T30-15-081LF

Storage & Server IO (Amphenol ICC)

CONN HDR 30POS 0.079 STACK SMD

0

59202-F24-10-047LF

59202-F24-10-047LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

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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