Terminal Blocks - Headers, Plugs and Sockets

Image	Part Number	Description / PDF	Quantity	Rfq
	OQ04A5000000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 4POS VERT 7.5MM	0
	OQ07A1010000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 7POS 90DEG 7.5MM	0
	TY1501000000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 15POS 90DEG 5MM	0
	TX0403000000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 4POS 90DEG 5MM	0
	H409705A0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 9POS STR 5MM	0
	KD2410520000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 24POS STR 3.5MM	0
	VE0532510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 5POS 90DEG 3.81MM	0
	H51570500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 15POS STR 5MM	0
	VM0855810000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 8POS STR 5.08MM	0
	VW2410300000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 24POS STR 3.5MM	0
	NB11A0850000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 11POS STR 7.5MM	0
	EH0621500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 6POS 90DEG 3.5MM	0
	V90651540000G Anytek (Amphenol Anytek)	TERM BLOCK RCPT 6POS 5.08MM	0
	TJ1551040000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 15POS STR 5.08MM	0
	NB2070840000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 20POS STR 5MM	0
	OQ08A5800000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 8POS VERT 7.5MM	0
	OQ2070810000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 20POS 90DEG 5MM	0
	OQ0853800000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 8POS VERT 5.08MM	0
	VX3211310000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 32POS 90DEG 3.5MM	0
	TJ1931540000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 19POS STR 3.81MM	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