Terminal Blocks - Headers, Plugs and Sockets

Image	Part Number	Description / PDF	Quantity	Rfq
	H50630500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 6POS STR 3.81MM	0
	KE4472530000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 44POS 90DEG 5MM	0
	KD2110520000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 21POS STR 3.5MM	0
	TT0201800000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 2POS 90DEG 5MM	0
	KV0750510000G Anytek (Amphenol Anytek)	TERM BLOCK HOUSING 7POS 5.08MM	0
	EL0811530000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 8POS 90DEG 3.5MM	0
	VM2235800000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 22POS STR 3.81MM	0
	HW1970820000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 19POS STR 5MM	0
	KD1950510000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 19POS STR 5.08MM	0
	H52170500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 21POS STR 5MM	0
	VK0431400000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 4POS 45DEG 3.81MM	0
	KD0330500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 3POS STR 3.81MM	0
	TS17710D0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 17POS 270DEG 5MM	0
	KV1350550000G Anytek (Amphenol Anytek)	TERM BLOCK HOUSING 13POS 5.08MM	0
	KE2851520000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 28POS VERT 5.08MM	0
	KI2430500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 24POS STR 3.81MM	0
	TS18310C0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 18POS 3.81MM	0
	V72411510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 24POS 90DEG 3.5MM	0
	OQ1354010000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 13POS 5.08MM	0
	OQ1312510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 13POS 90DEG 3.5MM	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