Terminal Blocks - Headers, Plugs and Sockets

Image	Part Number	Description / PDF	Quantity	Rfq
	VO2812500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 28POS VERT 3.5MM	0
	EH0321500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 3POS 90DEG 3.5MM	0
	VM0255500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 2POS STR 5.08MM	0
	TJ1131820000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 11POS STR 3.81MM	0
	HI2201520000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 22POS STR 5MM	0
	TJ1571040000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 15POS STR 5MM	0
	KD2450500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 24POS STR 5.08MM	0
	TJ1511530000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 15POS STR 3.5MM	0
	KD0970510000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 9POS STR 5MM	0
	V71151500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 11POS VERT 5.08MM	0
	KD1350510000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 13POS STR 5.08MM	0
	HN1450520000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 14POS STR 5.08MM	0
	OQ1854510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 18POS 5.08MM	0
	TS11A18B0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 11POS 7.5MM	0
	TJ2211820000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 22POS STR 3.5MM	0
	VM1215520000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 12POS STR 3.5MM	0
	TS07315C0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 7POS 3.81MM	0
	OQ1000510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 10POS 7.62MM	0
	TS08318A0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 8POS 3.81MM	0
	TJ1971570000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 19POS STR 5MM	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