Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1792810000 Weidmuller	TERM BLOCK PLUG 6POS STR 3.81MM	28200
1943590000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	318000
1615560000 Weidmuller	TERM BLOCK HDR 5POS 90DEG 3.5MM	685
1924540000 Weidmuller	TERM BLOCK PLUG 2POS STR 10.16MM	95
1982950000 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	72
1780470000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 5.08MM	72
2643440000 Weidmuller	TERM BLK HDR 4POS 90DEG 3.81MM	672672
1838210000 Weidmuller	TERM BLOCK HDR 2POS VERT 5.08MM	1060700
2643080000 Weidmuller	TERM BLK HDR 6POS 90DEG 3.81MM	312312
1289370000 Weidmuller	TERM BLOCK HDR 24POS 90DEG 3.5MM	0
1526810000 Weidmuller	TERM BLOCK PLUG 6POS STR 5.08MM	119
1971570000 Weidmuller	TERM BLOCK PLUG 3POS STR 3.81MM	0
1515560000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 5.08MM	693
1235980000 Weidmuller	TERM BLOCK PLUG 6POS STR 3.81MM	100
1747940000 Weidmuller	TERM BLOCK PLUG 24POS STR 3.5MM	0
1648960000 Weidmuller	TERM BLOCK HDR 19POS VERT 5.08MM	72
1862950000 Weidmuller	TERM BLOCK HDR 4POS VERT 3.81MM	90
1707480000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	185
2649110000 Weidmuller	TERM BLK HDR 3POS 90DEG 5.08MM	300300
1943850000 Weidmuller	TERM BLOCK PLUG 6POS STR 5.08MM	80480

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