Rectangular Connectors - Headers, Receptacles, Female Sockets

Part Number	Description / PDF	Quantity
M40-3100645R Harwin	CONN RCPT 12POS 0.039 GOLD SMD	743
G125-FS13405F2P Harwin	CONN RCPT 34POS 0.049 GOLD SMD	45
G125-FV10605F2P Harwin	CONN RCPT 6POS 0.049 GOLD PCB	40
G125-FV13405F1P Harwin	CONN RCPT 34POS 0.049 GOLD PCB	0
G125-FS13405F1P Harwin	CONN RCPT 34POS 0.049 GOLD SMD	11
M50-3142045 Harwin	CONN RCPT 20POS 0.05 GOLD SMD	298
M80-8970701 Harwin	CONN RCPT 7POS 0.079 GOLD PCB	188
M50-3130545 Harwin	CONN RCPT 5POS 0.05 GOLD SMD	1544
M50-3152042R Harwin	CONN RCPT 40POS 0.05 GOLD SMD	914
M50-3140645R Harwin	CONN RCPT 6POS 0.05 GOLD SMD	5364
M52-5151045 Harwin	CONN RCPT 20POS 0.05 GOLD SMD	143
M55-6014042R Harwin	CONN RCPT 40POS 0.05 GOLD SMD	370
M50-3130245R Harwin	CONN RCPT 2POS 0.05 GOLD SMD	236
M50-3102045 Harwin	CONN RCPT 40POS 0.05 GOLD SMD	327
M20-7830546 Harwin	CONN RCPT 10POS 0.1 TIN PCB	683
M22-6550242R Harwin	CONN RCPT 4P 0.079 GOLD SMD R/A	2292
M20-7880946 Harwin	CONN RCPT 18POS 0.1 TIN PCB R/A	0
M50-3002045 Harwin	CONN RCPT 40POS 0.05 GOLD PCB	555
M22-6540342R Harwin	CONN RCPT 3P 0.079 GOLD SMD R/A	0
M80-4101042 Harwin	CONN RCPT 10POS 0.079 GOLD PCB	517

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