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

Image Part Number Description / PDF Quantity Rfq
59202-G30-12-084LF

59202-G30-12-084LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54122-802100800LF

54122-802100800LF

Storage & Server IO (Amphenol ICC)

CONN HDR 10POS 0.1 STACK T/H

0

90599-079LF

90599-079LF

Storage & Server IO (Amphenol ICC)

MTK STK TH HDR

0

75970-356-36LF

75970-356-36LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.1 STACK T/H TIN

0

59202-T32-16A074LF

59202-T32-16A074LF

Storage & Server IO (Amphenol ICC)

MTK R/R SMT HDR

0

54122-108080900LF

54122-108080900LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.1 STACK T/H

0

98426-S02-03-110LF

98426-S02-03-110LF

Storage & Server IO (Amphenol ICC)

CONN HDR 6POS 0.079 STACK T/H

0

59112-F36-09-066LF

59112-F36-09-066LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

54122-111221700LF

54122-111221700LF

Storage & Server IO (Amphenol ICC)

CONN HDR 22POS 0.1 STACK T/H

0

54122-107201150LF

54122-107201150LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 0.1 STACK T/H

0

59132-F28-17-045LF

59132-F28-17-045LF

Storage & Server IO (Amphenol ICC)

MTK R/R STR HDR

0

75970-188-09LF

75970-188-09LF

Storage & Server IO (Amphenol ICC)

HDR STR SR DB.100 GP-DEROG 12-AS

0

54122-104200500LF

54122-104200500LF

Storage & Server IO (Amphenol ICC)

BERGSTIK CONN STACKER

0

20021831-04036T1LF

20021831-04036T1LF

Storage & Server IO (Amphenol ICC)

CONN HDR 36POS 0.05 STACK SMD

0

20021813-09008T4LF

20021813-09008T4LF

Storage & Server IO (Amphenol ICC)

CONN HDR 8POS 0.05 STACK T/H

0

54121-407031500LF

54121-407031500LF

Storage & Server IO (Amphenol ICC)

CONN HDR 3POS 0.1 STACK T/H TIN

0

54112-108401300LF

54112-108401300LF

Storage & Server IO (Amphenol ICC)

CONN HDR 40POS 0.1 STACK T/H

0

76745-128-72LF

76745-128-72LF

Storage & Server IO (Amphenol ICC)

CONN HDR 72POS 0.1 STACK T/H

0

72307-168HT

72307-168HT

Storage & Server IO (Amphenol ICC)

CONN HDR 68POS 0.1 STACK T/H

0

98426-S10-10-188LF

98426-S10-10-188LF

Storage & Server IO (Amphenol ICC)

CONN HDR 20POS 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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