Rectangular Connectors - Headers, Receptacles, Female Sockets

Part Number	Description / PDF	Quantity
M20-7831346 Harwin	CONN RCPT 26POS 0.1 TIN PCB	1333
M80-4125042 Harwin	CONN RCPT 50POS 0.079 GOLD SMD	16
M20-7831046 Harwin	CONN RCPT 20POS 0.1 TIN PCB	2830
M80-8502045 Harwin	CONN RCPT 20POS 0.079 GOLD PCB	0
G125-FS11205F1P Harwin	CONN RCPT 12POS 0.049 GOLD SMD	1
M80-8970205 Harwin	CONN RCPT 2POS 0.079 GOLD PCB	62
M20-7850546 Harwin	CONN RCPT 10POS 0.1 TIN PCB	400
M20-7810845 Harwin	CONN RCPT 16POS 0.1 GOLD SMD	1544
M40-3100845R Harwin	CONN RCPT 16POS 0.039 GOLD SMD	249
M22-6360542 Harwin	CONN RCPT 10POS 0.079 GOLD SMD	30
M22-7131242 Harwin	CONN RCPT 12POS 0.079 GOLD PCB	1549
G125-FV11005L0R Harwin	CONN RCPT 10POS 0.049 GOLD PCB	0
M22-6550642R Harwin	CONN RCPT 12P 0.079 GOLD SMD R/A	480
M50-3131045R Harwin	CONN RCPT 10POS 0.05 GOLD SMD	3953
M20-7812045R Harwin	CONN RCPT 40POS 0.1 GOLD SMD	600
M80-8400242 Harwin	CONN RCPT 2POS 0.079 GOLD PCB	27
M80-8500845 Harwin	CONN RCPT 8POS 0.079 GOLD PCB	228
M50-4302545 Harwin	CONN RCPT 50POS 0.05 GOLD SMD	280
M22-7132042 Harwin	CONN RCPT 20POS 0.079 GOLD PCB	0
M20-7830646 Harwin	CONN RCPT 12POS 0.1 TIN PCB	365

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