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

Image Part Number Description / PDF Quantity Rfq
87690-516RLF

87690-516RLF

Storage & Server IO (Amphenol ICC)

BERGSTIK-DEROG

0

98426-S04-17-133LF

98426-S04-17-133LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.079 STACK T/H

0

54121-109121650LF

54121-109121650LF

Storage & Server IO (Amphenol ICC)

CONN HDR 12POS 0.1 STACK T/H

0

54122-808081400LF

54122-808081400LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

54121-108021200LF

54121-108021200LF

Storage & Server IO (Amphenol ICC)

CONN HDR 2POS 0.1 STACK T/H

0

76745-1DF-26LF

76745-1DF-26LF

Storage & Server IO (Amphenol ICC)

CONN HDR 26POS 0.1 STACK T/H

0

59132-S34-17-076LF

59132-S34-17-076LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

59132-G40-12-140LF

59132-G40-12-140LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

54112-106081350LF

54112-106081350LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

98426-S01-17-105LF

98426-S01-17-105LF

Storage & Server IO (Amphenol ICC)

CONN HDR 34POS 0.079 STACK T/H

0

92813-047TRLF

92813-047TRLF

Storage & Server IO (Amphenol ICC)

MINITEK 2.0 HDR

0

54112-112400900LF

54112-112400900LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H

0

54121-810021500LF

54121-810021500LF

Storage & Server IO (Amphenol ICC)

CONN HDR

0

54111-110022050LF

54111-110022050LF

Storage & Server IO (Amphenol ICC)

CONN HDR 2POS 0.1 STACK T/H

0

59202-F34-05-114LF

59202-F34-05-114LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

59202-G40-07-174LF

59202-G40-07-174LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 0.079 STACK SMD

0

54121-808181000LF

54121-808181000LF

Storage & Server IO (Amphenol ICC)

CONN HDR 18POS 0.1 STACK T/H

0

59112-T28-06-055LF

59112-T28-06-055LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

20021831-05050T1LF

20021831-05050T1LF

Storage & Server IO (Amphenol ICC)

CONN HDR 50POS 0.05 STACK SMD

0

54122-108141300LF

54122-108141300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 14POS 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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