Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1970200000 Weidmuller	TERM BLOCK PLUG 13POS STR 3.81MM	90400
1838220000 Weidmuller	TERM BLOCK HDR 3POS VERT 5.08MM	1623
1348660000 Weidmuller	TERM BLOCK HDR 20POS 5.08MM	10020
1707490000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	144
1146570000 Weidmuller	TERM BLOCK HDR 12POS VERT 5.08MM	1203300
1972000000 Weidmuller	TERM BLOCK PLUG 14POS STR 3.81MM	99
2648400000 Weidmuller	TERM BLK HDR 2POS 90DEG 5.08MM	720
2643430000 Weidmuller	TERM BLK HDR 3POS 90DEG 3.81MM	500500
1943610000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	1544176
1278090000 Weidmuller	TERM BLOCK PLUG 14POS STR 3.5MM	47
1970130000 Weidmuller	TERM BLOCK PLUG 10POS STR 3.81MM	0
1793850000 Weidmuller	TERM BLOCK HDR 10POS VERT 3.81MM	3
1982200000 Weidmuller	TERM BLOCK PLUG 10POS 5.08MM	60
1930710000 Weidmuller	TERM BLOCK HDR 2POS VERT 7.62MM	209
1512860000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 5.08MM	474600
1524860000 Weidmuller	TERM BLOCK HDR 9POS VERT 5.08MM	194
2741710000 Weidmuller	PCB CONNECTOR, PLUG, 5.00MM PITC	0
1838090000 Weidmuller	TERM BLOCK HDR 13POS VERT 5.08MM	100
1793260000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 3.81MM	59
1155640000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 5.08MM	8265450

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