Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1012650000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	300
1838540000 Weidmuller	TERM BLOCK HDR 12POS VERT 5.08MM	88
1793830000 Weidmuller	TERM BLOCK HDR 6POS VERT 3.81MM	0
1596080000 Weidmuller	TERM BLOCK PLUG 4POS STR 5MM	886500
1970210000 Weidmuller	TERM BLOCK PLUG 14POS STR 3.81MM	100
2642110000 Weidmuller	TERM BLK PLUG 4POS 180DEG 3.81MM	196
1000950000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	165
2648440000 Weidmuller	TERM BLK HDR 6POS 90DEG 5.08MM	180180
1804710000 Weidmuller	TERM BLOCK HDR 3POS VERT 3.5MM	309
1059420000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	75
1278060000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.5MM	102
1000440001 Weidmuller	TERM BLOCK PLUG 5POS 5.08MM	47
1699270000 Weidmuller	TERM BLOCK HDR 6POS 90DEG 3.5MM	2003250
1282560000 Weidmuller	TERM BLOCK PLUG 10POS STR 5.08MM	104180
1277330000 Weidmuller	TERM BLOCK PLUG 14POS STR 3.5MM	56
1862530000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.81MM	0
1707860000 Weidmuller	TERM BLOCK PLUG 19POS STR 5.08MM	34
1002350000 Weidmuller	TERM BLOCK PLUG 9POS 5.08MM	60
1002120000 Weidmuller	TERM BLOCK PLUG 5POS 5.08MM	96
1948270000 Weidmuller	TERM BLOCK PLUG 5POS 5.08MM	28

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