Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
14110213002000 HARTING	TERM BLOCK HDR 2POS 90DEG 2.54MM	2020
14310513101000 HARTING	TERM BLOCK PLUG 5POS STR 2.54MM	144
14111013002000 HARTING	TERM BLOCK HDR 10POS 2.54MM	268
14120517002000 HARTING	TERM BLOCK HDR 5POS 90DEG 5.08MM	0
14120614002000 HARTING	TERM BLOCK HDR 6POS 90DEG 3.5MM	346
14110813002000 HARTING	TERM BLOCK HDR 8POS 90DEG 2.54MM	754
14310517402000 HARTING	HAR-FLEXICON, 5PIN FEMALE, HORIZ	0
14310713101000 HARTING	TERM BLOCK PLUG 7POS STR 2.54MM	197
14110913002000 HARTING	TERM BLOCK HDR 9POS 90DEG 2.54MM	485
14311013101000 HARTING	TERM BLOCK PLUG 10POS STR 2.54MM	0
14310313101160 HARTING	TERM BLOCK PLUG 3POS STR 2.54MM	92
14120516001000 HARTING	TERM BLOCK HDR 5POS VERT 5MM	0
14110713002000 HARTING	TERM BLOCK HDR 7POS 90DEG 2.54MM	528
14311016402000 HARTING	TERM BLOCK PLUG 10POS 90DEG 5MM	0
14110413001000 HARTING	TERM BLOCK HDR 4POS VERT 2.54MM	0
14310913101000 HARTING	TERM BLOCK PLUG 9POS STR 2.54MM	8
14310213101160 HARTING	TERM BLOCK PLUG 2POS STR 2.54MM	8
14111213002000 HARTING	TERM BLOCK HDR 12POS 2.54MM	495
14121517005000 HARTING	HAR-FLEXICON, 15PIN MALE, VERTIC	0
14120515006000 HARTING	HAR-FLEXICON, 5PIN MALE, HORIZON	0

Terminal Blocks - Headers, Plugs and Sockets

1. Overview

Terminal blocks, headers, plugs, and sockets are essential components in electrical and electronic systems for establishing reliable connections between circuits. These devices enable signal transmission, power distribution, and system modularity. Their standardized designs ensure interoperability, scalability, and ease of maintenance in complex systems.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Terminal Blocks	Screw/clamp-based connections for high current/ voltage	Industrial control panels, power distribution units
PCB Headers	Pin/grid arrays for board-to-board connections	Embedded systems, Arduino shields
RJ Connectors	Modular jacks for data/telecom signals	Ethernet networks (RJ45), telephone systems (RJ11)
D-Sub Connectors	Multi-pin trapezoidal shells for analog/digital signals	Legacy serial interfaces, industrial sensors
USB Connectors	Hot-pluggable interfaces for power/data	Consumer electronics, peripheral devices

3. Structure and Components

Typical structures include:

Insulating housing (PA66, PBT, or LCP plastics)
Contact elements (phosphor bronze, beryllium copper)
Plating materials (gold, tin, nickel for corrosion resistance)
Actuation mechanisms (screws, spring clamps, or friction fits)
EMI shielding layers (for high-frequency applications)

4. Key Technical Specifications

Parameter	Importance
Current Rating (A)	Determines power handling capacity
Voltage Rating (V)	Defines dielectric strength requirements
Contact Resistance (m )	Impacts signal integrity and power loss
Insertion Loss (dB)	Critical for high-speed data transmission
Mating Cycles	Indicates mechanical durability
Operating Temperature (- C to + C)	Defines environmental tolerance

5. Application Fields

Primary industries include:

Industrial automation (PLCs, HMIs)
Telecommunications (5G base stations, routers)
Consumer electronics (smartphones, wearables)
Medical equipment (imaging devices, patient monitors)
Automotive (EV charging systems, ADAS)

6. Leading Manufacturers and Products

Manufacturer	Representative Product
Phoenix Contact	COMBICON series terminal blocks
TE Connectivity	MICRO MATCH connectors
Molex	SL Series headers
Amphenol	D-Subminiature connectors
Samtec	QTE high-speed socket systems

7. Selection Guidelines

Key considerations:

Electrical requirements (current/voltage levels)
Mechanical constraints (space, vibration)
Environmental factors (temperature, humidity)
Signal integrity needs (frequency, noise rejection)
Cost vs. reliability trade-offs
Compliance with standards (IPC, IEC, UL)

8. Industry Trends

Emerging developments include:

Miniaturization for wearable devices
High-speed connectors for 5G/6G ( 25 Gbps)
Hybrid connectors integrating power/data
Eco-friendly materials (halogen-free, RoHS compliant)
Smart connectors with built-in sensors
Automotive-grade connectors for EVs