Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1943580000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	509911400
1969920000 Weidmuller	TERM BLOCK PLUG 3POS STR 3.81MM	200
2649090000 Weidmuller	TERM BLK HDR 2POS 90DEG 5.08MM	499500
1060550000 Weidmuller	TERM BLOCK PLUG 2POS STR 7.62MM	222780
1155600000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 5.08MM	324
1231680000 Weidmuller	TERM BLOCK PLUG 5POS STR 3.81MM	95
1527210000 Weidmuller	TERM BLOCK PLUG 10POS STR 5.08MM	62
1508160000 Weidmuller	TERM BLOCK HDR 3POS 90DEG 5.08MM	23100
1612110000 Weidmuller	TERM BLOCK PLUG 7POS 90DEG 7MM	30
1838180000 Weidmuller	TERM BLOCK HDR 22POS VERT 5.08MM	60
1277540000 Weidmuller	TERM BLOCK PLUG 18POS STR 3.5MM	0
1501710000 Weidmuller	TERM BLOCK PLUG 24POS STR 5.08MM	0
1979280000 Weidmuller	TERM BLOCK PLUG 3POS 90DEG 5MM	0
1793630000 Weidmuller	TERM BLOCK HDR 4POS VERT 3.81MM	665
1001560000 Weidmuller	TERM BLOCK PLUG 5POS 5.08MM	139
1430130000 Weidmuller	PCB PLUG-IN CONNECTOR, FEMALE PL	30
1837920000 Weidmuller	TERM BLOCK HDR 17POS VERT 5.08MM	5536
1043790000 Weidmuller	TERM BLOCK PLUG 2POS STR 7.62MM	120
1511160000 Weidmuller	TERM BLOCK HDR 10POS 5.08MM	203100
1776352001 Weidmuller	TERM BLOCK HDR 24POS VERT 5.08MM	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