Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1945130000 Weidmuller	TERM BLOCK PLUG 9POS STR 5.08MM	90
1502460000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	13542
1000470001 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	72
1690440000 Weidmuller	TERM BLOCK PLUG 4POS STR 3.5MM	51200
1639740000 Weidmuller	TERM BLOCK PLUG 6POS 3.5MM	0
1095660000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 7.62MM	195
1779920000 Weidmuller	TERM BLOCK PLUG 10/30POS 3.5MM	0
1943830000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	300
1604530000 Weidmuller	TERM BLOCK HDR 8POS VERT 3.5MM	0
1815430000 Weidmuller	TERM BLOCK PLUG 1POS STR	325
1629570000 Weidmuller	TERM BLOCK HDR 2POS VERT 7.5MM	148700
1615690000 Weidmuller	TERM BLOCK PLUG 4POS STR 3.5MM	80794356
1776402001 Weidmuller	TERM BLOCK HDR 6POS VERT 5.08MM	0
1615800000 Weidmuller	TERM BLOCK PLUG 4POS STR 3.5MM	9341260
1690640000 Weidmuller	TERM BLOCK PLUG 24POS STR 3.5MM	25
1761642001 Weidmuller	TERM BLOCK HDR 12POS 90DEG 3.5MM	1539550
2641920000 Weidmuller	TERM BLK PLUG 4POS 90DEG 3.81MM	240256
1639280000 Weidmuller	TERM BLOCK PLUG 6POS 90DEG 3.5MM	0
1642270000 Weidmuller	TERM BLOCK HDR 16POS 90DEG 3.5MM	0
1943870000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	1182385

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