Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1013450000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	113
1615600000 Weidmuller	TERM BLOCK HDR 10POS 90DEG 3.5MM	30
1156720000 Weidmuller	TERM BLOCK PLUG 3POS STR 7.62MM	74
1281860000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	0
1970440000 Weidmuller	TERM BLOCK PLUG 7POS STR 3.81MM	100
1798680000 Weidmuller	TERM BLOCK PLUG 2POS 3.81MM	0
1793270000 Weidmuller	TERM BLOCK HDR 5POS 90DEG 3.81MM	5
1346860000 Weidmuller	TERM BLOCK HDR 2POS 90DEG 5.08MM	6842200
1000050001 Weidmuller	TERM BLOCK PLUG 4POS 5.08MM	0
1944110000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	115120
2647710000 Weidmuller	TERM BLK PLUG 2POS 90DEG 5.08MM	108108
1059610000 Weidmuller	TERM BLOCK PLUG 7POS STR 7.62MM	74
2741500000 Weidmuller	PCB CONNECTOR, HEADER, 5.00MM PI	0
1013170000 Weidmuller	TERM BLOCK PLUG 10POS STR 5.08MM	5730
1838560000 Weidmuller	TERM BLOCK HDR 14POS VERT 5.08MM	44
1775942001 Weidmuller	TERM BLOCK HDR 4POS VERT 5.08MM	52
1277900000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.5MM	99
1716360000 Weidmuller	TERM BLOCK PLUG 6POS STR 5.08MM	6
1838080000 Weidmuller	TERM BLOCK HDR 12POS VERT 5.08MM	125
1727680000 Weidmuller	TERM BLOCK PLUG 14POS STR 3.5MM	339

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