Rectangular Connectors - Headers, Receptacles, Female Sockets

Part Number	Description / PDF	Quantity
M52-5112545 Harwin	CONN RCPT 50POS 0.05 GOLD PCB	0
M80-7045105 Harwin	CONN RCPT 51POS 0.079 GOLD PCB	3
M52-5000645 Harwin	CONN RCPT 6POS 0.05 GOLD PCB	1838
M80-4001042 Harwin	CONN RCPT 10POS 0.079 GOLD PCB	8
M50-3001245 Harwin	CONN RCPT 24POS 0.05 GOLD PCB	1017
M20-7880246 Harwin	CONN RCPT 4POS 0.1 TIN PCB R/A	448
M80-4120642 Harwin	CONN RCPT 6POS 0.079 GOLD SMD	0
G125-FV10605L0P Harwin	CONN RCPT 6POS 0.049 GOLD PCB	5026
M50-3130545R Harwin	CONN RCPT 5POS 0.05 GOLD SMD	0
M20-7810345 Harwin	CONN RCPT 6POS 0.1 GOLD SMD	1627
M20-7891442 Harwin	CONN RCPT 14POS 0.1 GOLD PCB R/A	0
G125-FV21005L0R Harwin	CONN RCPT 10POS 0.049 GOLD PCB	0
M50-3131045 Harwin	CONN RCPT 10POS 0.05 GOLD SMD	169
M80-6811645 Harwin	CONN RCPT 16POS 0.079 GOLD SMD	0
M80-4103442 Harwin	CONN RCPT 34POS 0.079 GOLD PCB	102
M20-7810345R Harwin	CONN RCPT 6POS 0.1 GOLD SMD	1600
M80-4202042 Harwin	CONN RCPT 20POS 0.079 GOLD PCB	4
M20-7820446 Harwin	CONN RCPT 4POS 0.1 TIN PCB	1853
M22-6340442 Harwin	CONN RCPT 8POS 0.079 GOLD SMD	1312
M22-7130942 Harwin	CONN RCPT 9POS 0.079 GOLD PCB	462

Rectangular Connectors - Headers, Receptacles, Female Sockets

1. Overview

Rectangular connectors are modular electrical components designed to establish reliable connections between PCBs (Printed Circuit Boards) or electronic systems. This category includes headers (male pins), receptacles (female contacts), and sockets, which enable signal/power transmission while maintaining mechanical stability. Their standardized designs and versatility make them critical in modern electronics, from consumer devices to industrial machinery.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Single-Row Headers	Linear arrangement of male pins	Arduino shields, sensor modules
Double-Row Headers	Dual-row pin configuration for higher density	Computer motherboards, industrial controllers
Right-Angle Receptacles	90 orientation for space-constrained designs	Compact medical devices, automotive sensors
Stacking Female Sockets	Vertical interconnection for multi-board systems	3D printer control stacks, test equipment

3. Structure and Components

Typical construction includes:

Contact Terminals: Phosphor bronze or beryllium copper with gold/tin plating for conductivity
Insulation Housing: Thermoplastic materials (e.g., LCP, Nylon 6/6) for dielectric strength
Retention Mechanism: Polarization keys and locking tabs to prevent misalignment
Mounting Options: Through-hole or surface-mount (SMT) configurations

4. Key Technical Specifications

Parameter	Value/Range	Importance
Current Rating	0.5A - 10A per contact	Determines power transmission capacity
Contact Resistance	5-20m	Affects signal integrity and thermal performance
Dielectric Strength	500V - 2500V AC	Ensures electrical safety and insulation reliability
Operating Temperature	-55 C to +125 C	Defines environmental tolerance
Mating Cycles	100 - 10,000 cycles	Indicates mechanical durability

5. Application Fields

Consumer Electronics: Smartphones, laptops, gaming consoles
Industrial Automation: PLCs, motor drives, sensor hubs
Telecommunications: 5G base stations, network routers
Medical Devices: Diagnostic equipment, patient monitors
Automotive: ECU connectors, ADAS sensors

6. Leading Manufacturers and Products

Manufacturer	Representative Product
TE Connectivity	MicroSpeed Rectangular Connectors
Molex	PicoBlade 0.8mm Headers
Amphenol	MICRO CONECTA Surface Mount Sockets
Samtec	QTRADE High-Speed Receptacles

7. Selection Guidelines

Key considerations:

Electrical requirements (current/voltage levels)
PCB space constraints and stacking needs
Environmental factors (temperature, vibration, moisture)
Cost-effectiveness vs. long-term reliability
Compliance with standards (IPC, RoHS, REACH)

Example: For automotive applications, prioritize connectors with high vibration resistance (e.g., TE Connectivity's AMPMODU series) and AEC-Q200 certification.

8. Industry Trends

Emerging directions include:

Miniaturization: Sub-1.0mm pitch connectors for wearable devices
High-speed capabilities: 10+ Gbps data rates for 5G infrastructure
Enhanced reliability: Hermetic sealing for aerospace applications
Modular designs: Tool-less hot-swap systems for data centers