Card Edge Connectors - Edgeboard Connectors

Part Number	Description / PDF	Quantity
346-044-521-202 EDAC Inc.	CONN EDGE DUAL FMALE 44POS 0.125	0
ME1016813401201 Storage & Server IO (Amphenol ICC)	CONN EDGE DUAL FMALE 168P 0.024	1770
CR22-68D-2.54DS(70) Hirose	CONN EDGE DUAL FMALE 68POS 0.100	0
EBC36MMJD Sullins Connector Solutions	CONN CARDEDGE MALE 72POS 0.100	0
10018783-10013TLF Storage & Server IO (Amphenol ICC)	CONN PCI EXP FEMALE 164POS 0.039	1414
10018783-10001TLF Storage & Server IO (Amphenol ICC)	CONN PCI EXP FEMALE 64POS 0.039	0
MEC8-110-02-SM-DV-A-K-TR Samtec, Inc.	CONN EDGE DUAL FMALE 20POS 0.031	0
3666-0001 3M	CONN EDGE DUAL FMALE 60POS 0.100	474
2327679-1 TE Connectivity AMP Connectors	RECEPTACLE ASSY 56 POS VERT GEN	1643
5530843-8 TE Connectivity AMP Connectors	CONN CARDEDGE FEMALE 72POS 0.100	215
ECC25DJBN Sullins Connector Solutions	CONN EDGE DUAL FMALE 50POS 0.100	0
EBM40MMVN Sullins Connector Solutions	CONN CARDEDGE MALE 80POS 0.156	0
SPD08-020-L-RB-TR 3M	CONN EDGE DUAL FMALE 20POS 0.031	0
395-056-540-802 EDAC Inc.	CONN EDGE DUAL FMALE 56POS 0.100	0
7-5530843-6 TE Connectivity AMP Connectors	CONN CARDEDGE FEMALE 12POS 0.100	1698
EBC10MMAN Sullins Connector Solutions	CONN CARDEDGE MALE 20POS 0.100	0
ECC50MMVD Sullins Connector Solutions	CONN CARDEDGE MALE 100POS 0.100	0
ECM16MMWD Sullins Connector Solutions	CONN CARDEDGE MALE 32POS 0.156	0
EBC05MMSN Sullins Connector Solutions	CONN CARDEDGE MALE 10POS 0.100	0
737-086-522-206 EDAC Inc.	CONN EDGE DUAL FMALE 86POS 0.156	0

Card Edge Connectors - Edgeboard Connectors

1. Overview

Card Edge Connectors, also known as Edgeboard Connectors, are electrical connectors designed to connect printed circuit boards (PCBs) directly to other boards or systems via their edges. These connectors eliminate the need for separate cables or wiring harnesses by utilizing the PCB's edge as both the mechanical support and electrical interface. They play a critical role in modern electronics by enabling compact designs, reliable signal transmission, and modular system architectures.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
PCIe Edge Connectors	High-speed serial communication with low latency	Graphics cards, SSDs, network adapters
DIMM Connectors	Parallel data transfer for memory modules	Desktop/server RAM modules
SATA Edge Connectors	Serial data transfer with hot-swapping capability	HDDs, SSDs, optical drives
USB Type-C Edge Connectors	Bidirectional 24-pin configuration with power delivery	Laptops, mobile devices, docking stations

3. Structure and Components

Typical card edge connectors consist of: - Contact Points: Phosphor bronze or beryllium copper with gold-plated surfaces (10-50 m thickness) for low resistance - Insulation Body: High-temperature resistant LCP or nylon materials (UL94 V-0 rated) - Retention Mechanism: Integrated latches or screws for vibration resistance - PCB Interface: Precision-machined slots with alignment guides ( 0.05mm tolerance) - Shielding Layer: EMI-suppressing metal shells for high-frequency applications

4. Key Technical Specifications

Parameter	Typical Value	Importance
Contact Resistance	5-20m	Ensures minimal signal loss
Current Rating	1-5A per contact	Determines power delivery capacity
Dielectric Withstanding Voltage	500-1000V AC	Guarantees electrical safety
Insertion Force	20-60N	Affects user experience and durability
Operating Temperature	-55 C to +125 C	Defines environmental adaptability
Mating Cycles	500-10,000 cycles	Measures mechanical longevity

5. Application Fields

Computer Systems: Motherboards, expansion cards, memory modules
Telecommunications: 5G base stations, network switches
Industrial Automation: PLCs, control panels
Medical Equipment: MRI scanners, diagnostic devices
Consumer Electronics: Smartphones, gaming consoles

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Amphenol ICC	SmartSpring PCIe Gen5	7GHz bandwidth, 0.3mm pitch
TE Connectivity	MEZZOP Edge Connector	Double-sided contact design
Molex	SL Series DIMM	2.0N contact force reduction
Samtec	Edge Rate HD	0.8mm pitch, 25Gbps per channel

7. Selection Guidelines

Key considerations include: - Signal integrity requirements (frequency vs. crosstalk) - Mechanical constraints (board thickness, spacing) - Environmental conditions (temperature, vibration) - Compliance standards (IPC, RoHS) - Cost-performance balance (gold thickness vs. mating cycles) - Example: For a 10Gbps Ethernet switch, select connectors with controlled impedance (100 10%) and low insertion loss (<0.5dB at 12.5GHz)

8. Industry Trends

Current development directions: - High-density designs (sub-0.5mm pitch) - Enhanced thermal management for 5G applications - Integration with optical interconnects - Surface-mount technology (SMT) adoption - Increased use of conductive polymers for contact materials - Development of self-aligning connectors for automated assembly