Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
EDSTLZ975/3 On-Shore Technology, Inc.	TERM BLOCK HDR 6POS VERT 5.08MM	133
EBHA-03-D Adam Tech	EURO BLOCK 3P	0
1805301 Phoenix Contact	TERM BLOCK PLUG 2POS STR 5.08MM	0
EDZ1700/8 On-Shore Technology, Inc.	TERM BLOCK PLUG 8POS 3.81MM	99
1955866 Phoenix Contact	TERM BLOCK HDR 3POS VERT 5.08MM	30
ED130/12DS On-Shore Technology, Inc.	TERM BLOCK PLUG 12POS 90DEG 5MM	0
XW4H-03A1 Omron Electronics Components	TERM BLOCK PLUG 3POS STR 2.54MM	0
EDZ960/12 On-Shore Technology, Inc.	TERM BLOCK PLUG 12POS STR 7.62MM	0
1900468 Phoenix Contact	TERM BLOCK PLUG 2POS STR 3.5MM	100700
1913772 Phoenix Contact	TERM BLOCK HDR 8POS 10.16MM	44
691311500117 Würth Elektronik Midcom	TERM BLOCK HDR 17POS VERT 5.08MM	88
OQ0954500000G Anytek (Amphenol Anytek)	TERM BLOCK HDR 9POS VERT 5.08MM	0
1002150000 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	72
1913659 Phoenix Contact	TERM BLOCK HDR 3POS 10.16MM	2650
1935624 Phoenix Contact	TERM BLOCK HDR 24POS VERT 5MM	142
282959-4 TE Connectivity AMP Connectors	TERM BLOCK PLUG 4POS STR 7.5MM	0
1201820000 Weidmuller	TERM BLOCK HDR 10POS 5.08MM	7
1776715 Phoenix Contact	TERM BLOCK HDR 4POS 90DEG 5MM	250
691344410005 Würth Elektronik Midcom	7.62 MM TERMINAL BLOCK PLUG, HOR	146
2319461-3 TE Connectivity AMP Connectors	WIREMATE 2-PIECE 5MM CONN ASSY,	2223

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