Terminal Blocks - Headers, Plugs and Sockets

Image	Part Number	Description / PDF	Quantity	Rfq
	VM1855810000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 18POS STR 5.08MM	0
	VK1231500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 12POS 3.81MM	0
	VM1055830000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 10POS STR 5.08MM	0
	VK0931500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 9POS 45DEG 3.81MM	0
	VL32B1500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 32POS VERT 2.5MM	0
	TS10110D0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 10POS 3.5MM	0
	TS03A10C0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 3POS 90DEG 7.5MM	0
	ET0202500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 2POS STR 7.62MM	0
	TS11318C0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 11POS 3.81MM	0
	OQ0355810000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 2POS 90DEG 5.08MM	0
	HW0270000000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 2POS STR 5MM	0
	OQ2215510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 22POS 90DEG 3.5MM	0
	OQ1735810000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 17POS 3.81MM	0
	VL4011500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 40POS VERT 3.5MM	0
	TJ0451870000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 4POS STR 5.08MM	0
	KE141151A000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 14POS 90DEG 3.5MM	0
	TJ1101000000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 11POS STR 7.62MM	0
	KE063351A000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 6POS 90DEG 3.81MM	0
	TJ1951570000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 19POS STR 5.08MM	0
	TS16518C0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 16POS 5.08MM	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