Rectangular Connectors - Arrays, Edge Type, Mezzanine (Board to Board)

Part Number	Description / PDF	Quantity
XH3B-4041-4A Omron Electronics Components	CONN SOCKET 40POS VERT GOLD	50
XH3A-8041-A Omron Electronics Components	CONN PLUG 80POS VERT GOLD	40
XH3B-0142-A Omron Electronics Components	CONN SOCKET 100POS R/A GOLD	109
XH3A-2041-4A Omron Electronics Components	CONN PLUG 20POS VERT GOLD	80
XH3A-2041-2A Omron Electronics Components	CONN PLUG 20POS VERT GOLD	22
XH3B-3041-4A Omron Electronics Components	CONNECTOR	0
XH4A-8031-1A Omron Electronics Components	CONN SELF-MATE 80POS VERT GOLD	0
XH2B-5042-A Omron Electronics Components	CONN SOCKET 50POS R/A GOLD	0
XH4A-4035-2A Omron Electronics Components	CONN SELF-MATE 40POS SMD GOLD	0
XH2B-6041-A Omron Electronics Components	CONN SOCKET 60POS VERT GOLD	0
XH3B-2041-3A Omron Electronics Components	CONN SOCKET 20POS VERT GOLD	0
XH3B-5041-4A Omron Electronics Components	CONN SOCKET 50POS VERT GOLD	80
XH2A-3042-A Omron Electronics Components	CONN PLUG 30POS R/A GOLD	0
XH2B-5042-S003 Omron Electronics Components	CONN SOCKET 50POS R/A GOLD	0
XH3B-4041-3A Omron Electronics Components	CONN SOCKET 40POS VERT GOLD	0
XH3B-0241-A Omron Electronics Components	CONN SOCKET 120POS VERT GOLD	0
XH2A-6041 Omron Electronics Components	CONN PLUG 60POS VERT GOLD	0
XH4A-0135-A Omron Electronics Components	CONN SELF-MATE 100POS SMD GOLD	0
XH3B-2041-A Omron Electronics Components	CONNECTOR	0
XH3A-6041-2A Omron Electronics Components	CONN PLUG 60POS VERT GOLD	0

Rectangular Connectors - Arrays, Edge Type, Mezzanine (Board to Board)

1. Overview

Rectangular connectors are modular electronic components designed to establish electrical connections between subsystems or boards. Arrays, edge type, and mezzanine (board-to-board) connectors enable high-density interconnects in compact spaces. These connectors are critical for modern electronics, supporting miniaturization, high-speed data transfer, and reliable power delivery in applications ranging from consumer devices to industrial systems.

2. Major Types and Functional Classification

Type	Functional Features	Application Examples
Array Connectors	High-pin-count designs with parallel signal/power paths; optimized for compactness and thermal management	Backplanes in servers, high-performance computing (HPC) systems
Edge Connectors	Mount directly onto PCB edges; support planar or right-angle configurations	Memory modules (DIMMs), peripheral expansion cards (GPUs)
Mezzanine Connectors	Vertical/horizontal stacking solutions; support board-to-board spacing from 0.8mm to 50mm	Telecom routers, embedded systems (e.g., COM Express modules)

3. Structure and Components

A typical rectangular connector consists of:

Contact Points: Phosphor bronze or beryllium copper alloys with gold/tin plating for low resistance
Insulation Housing: Thermoplastic materials (e.g., LCP, PBT) ensuring dielectric strength and flame resistance
Retention Mechanism: Polarized keys, latches, or friction locks to prevent accidental disconnection
Shielding: Optional EMI protection via metallic shells or conductive coatings

4. Key Technical Specifications

Parameter	Typical Range	Importance
Current Rating	0.5A 5A per contact	Determines power-handling capability
Voltage Rating	50V 600V AC/DC	Safety and insulation design
Contact Resistance	5 20 m	Impacts signal integrity and thermal performance
Insulation Resistance	>100 G	Prevents leakage currents
Operating Temperature	-55 C to +125 C	Ensures reliability in harsh environments
Mating Cycles	100 10,000 cycles	Defines mechanical durability

5. Application Fields

Telecommunications: 5G base stations, optical network units
Industrial Automation: PLCs, robotic controllers
Medical Devices: MRI scanners, patient monitors
Consumer Electronics: Gaming consoles, notebook computers

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TE Connectivity	MikroBlast	High-speed mezzanine connector with 12 Gbps capability
Amphenol	Edge	Edge-mount connectors with self-aligning design
Molex	Clarity	Array connector with 0.4mm pitch for mobile devices
Samtec	QSE Series	Self-mating mezzanine connectors for rugged environments

7. Selection Guidelines

When choosing connectors, consider:

Electrical Requirements: Match current/voltage ratings to system needs
Mechanical Constraints: Verify board spacing and alignment tolerances
Environmental Factors: Select materials for temperature, humidity, and vibration resistance
Cost-Performance Balance: Prioritize high-cycle durability for maintenance-prone systems

Example: For a 5G base station, choose a mezzanine connector with 360 shielding and IP67 rating to minimize signal loss and environmental degradation.

8. Industry Trends

Miniaturization: Pitch sizes below 0.4mm to accommodate compact IoT devices
High-Speed Data Transfer: Development of connectors supporting 56 Gbps+ differential signaling
Modular Designs: Hybrid power/signal connectors for flexible system architectures
Sustainability: Adoption of halogen-free materials and recyclable alloys
Smart Manufacturing: Integration of RFID tags in connectors for automated asset tracking