Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
HW0410520000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 4POS STR 3.5MM	1734
VK0272500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 2POS 45DEG 5MM	0
OQ0653510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 6POS 90DEG 5.08MM	0
20020002-G081B01LF Anytek (Amphenol Anytek)	TERM BLOCK PLUG 8POS STR 5MM	0
VM0375500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 3POS STR 5MM	0
TJ0451570000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 4POS STR 5.08MM	1082
OQ0353500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 3POS VERT 5.08MM	0
OQ1054500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 10POS VERT 5.08MM	1924
20020003-H101B01LF Anytek (Amphenol Anytek)	TERM BLOCK PLUG 10POS STR 5.08MM	0
TS08515A0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 8POS 5.08MM	1794
VM0315500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 3POS STR 3.5MM	2908
TJ0231530000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 2POS STR 3.81MM	5930
20020009-G081B01LF Anytek (Amphenol Anytek)	TERM BLOCK PLUG 8POS 90DEG 5MM	0
TJ0231520000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 2POS STR 3.81MM	1330
20020013-H101B01LF Anytek (Amphenol Anytek)	TERM BLOCK PLUG 10POS STR 5.08MM	0
VK0872500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 8POS 45DEG 5MM	0
HW1070500000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 10POS STR 5MM	0
TS04515B0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 4POS 5.08MM	2204
OQ0315510000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 3POS 90DEG 3.5MM	0
OQ0771500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 7POS VERT 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