Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1946290000 Weidmuller	TERM BLOCK PLUG 6POS 5.08MM	130120
2642470000 Weidmuller	TERM BLK PLUG 2POS 90DEG 3.81MM	200
1792790000 Weidmuller	TERM BLOCK PLUG 4POS STR 3.81MM	953
1290280000 Weidmuller	TERM BLOCK HDR 16POS VERT 3.5MM	0
1982180000 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	72
1729280000 Weidmuller	TERM BLOCK HDR 8POS VERT 3.5MM	0
2647980000 Weidmuller	TERM BLK PLUG 6POS 180DEG 5.08MM	9090
1627450000 Weidmuller	TERM BLOCK PLUG 10POS STR 5.08MM	0
1792860000 Weidmuller	TERM BLOCK PLUG 2POS STR 3.81MM	258350
1626680000 Weidmuller	TERM BLOCK HDR 10POS VERT 5MM	14
1014120000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	2576660
1862940000 Weidmuller	TERM BLOCK HDR 3POS VERT 3.81MM	0
1838170000 Weidmuller	TERM BLOCK HDR 21POS VERT 5.08MM	80
1789090000 Weidmuller	TERM BLOCK PLUG 10POS STR 3.5MM	0
1581350000 Weidmuller	TERM BLOCK HDR 5POS VERT 5MM	146
2648420000 Weidmuller	TERM BLK HDR 4POS 90DEG 5.08MM	250250
1012970000 Weidmuller	TERM BLOCK PLUG 16POS STR 5.08MM	0
1612050000 Weidmuller	TERM BLOCK PLUG 5POS 90DEG 7MM	2910
1945120000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	102
1792890000 Weidmuller	TERM BLOCK PLUG 5POS STR 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