Terminal Blocks - Headers, Plugs and Sockets

Image	Part Number	Description / PDF	Quantity	Rfq
	HI0201520000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 2POS STR 5MM	0
	VF0471500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 4POS VERT 5MM	0
	HW05B0800000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 5POS STR 2.5MM	0
	VM0455000000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 4POS STR 5.08MM	0
	OQ1132000000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 11POS VERT 3.81MM	0
	VM2455520000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 24POS STR 5.08MM	0
	NB1770820000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 17POS STR 5MM	0
	OQ1470800000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 14POS VERT 5MM	0
	V72111510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 21POS 90DEG 3.5MM	0
	VF3431500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 34POS VERT 3.81MM	0
	V711A2500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 11POS VERT 7.5MM	0
	VM0955030000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 9POS STR 5.08MM	0
	TS09515B0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 9POS 5.08MM	0
	OQ15A1500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 15POS VERT 7.5MM	0
	OQ11A0510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 11POS 90DEG 7.5MM	0
	KI2430510000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 24POS STR 3.81MM	0
	KD2410500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 24POS STR 3.5MM	0
	VF3472500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 34POS VERT 5MM	0
	KU05C1510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 5POS 90DEG 15MM	0
	VO1231510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 12POS 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