Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1173510000 Weidmuller	TERM BLOCK PLUG 3POS STR 7.62MM	79
1728360000 Weidmuller	TERM BLOCK HDR 16POS 90DEG 3.5MM	0
1871690000 Weidmuller	TERM BLOCK PLUG 10POS STR 3.5MM	4280
1524210000 Weidmuller	TERM BLOCK HDR 3POS VERT 5.08MM	500
1815510000 Weidmuller	TERM BLOCK PLUG 5POS STR	46100
1770680000 Weidmuller	TERM BLOCK PLUG 3POS 3.5MM	0
1982720000 Weidmuller	TERM BLOCK PLUG 4POS 5.08MM	10090
1357890000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.5MM	0
1727650000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.5MM	464
2013890000 Weidmuller	LUP 10.16/06/90V 5.0SN BK BX	20
1000870000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	180
1793790000 Weidmuller	TERM BLOCK HDR 2POS VERT 3.81MM	330
1529360000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	107100
1792930000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.81MM	0
1760982001 Weidmuller	TERM BLOCK HDR 4POS VERT 3.5MM	0
1948300000 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	1884
1612160000 Weidmuller	TERM BLOCK PLUG 9POS STR 7MM	110
1605160000 Weidmuller	TERM BLOCK HDR 11POS 90DEG 3.5MM	0
1581480000 Weidmuller	TERM BLOCK HDR 18POS VERT 5MM	120
1013680000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	837

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