Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1793310000 Weidmuller	TERM BLOCK HDR 12POS 3.81MM	0
1001170000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	58
1748580000 Weidmuller	TERM BLOCK PLUG 24POS STR 3.5MM	0
1528060000 Weidmuller	TERM BLOCK PLUG 18POS STR 5.08MM	2320
1349360000 Weidmuller	TERM BLOCK HDR 4POS VERT 5.08MM	66
1943930000 Weidmuller	TERM BLOCK PLUG 14POS STR 5.08MM	486
1526560000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	19
1012690000 Weidmuller	TERM BLOCK PLUG 7POS STR 5.08MM	72
1398890000 Weidmuller	PCB PLUG-IN CONNECTOR, FEMALE PL	30
1648930000 Weidmuller	TERM BLOCK HDR 16POS VERT 5.08MM	275
1149500000 Weidmuller	TERM BLOCK HDR 5POS VERT 5.08MM	850
1610500000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	251711500
2013900000 Weidmuller	LUP 10.16/07/90V 5.0SN BK BX	20
1638860000 Weidmuller	TERM BLOCK PLUG 10POS 3.5MM	29
1639340000 Weidmuller	TERM BLOCK PLUG 12POS 3.5MM	184396
1043920000 Weidmuller	TERM BLOCK PLUG 3POS STR 7.62MM	59
1289470000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.5MM	81168
1014390000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	135
1820620000 Weidmuller	TERM BLOCK HDR 8POS VERT 5.08MM	10426496
1779910000 Weidmuller	TERM BLOCK PLUG 10/30POS 3.5MM	20

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