Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1950050000 Weidmuller	TERM BLOCK PLUG 3POS 5.08MM	2304
1946250000 Weidmuller	TERM BLOCK PLUG 2POS 5.08MM	495
1690500000 Weidmuller	TERM BLOCK PLUG 10POS STR 3.5MM	13550
1726510000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 5.08MM	0
1522060000 Weidmuller	TERM BLOCK HDR 4POS VERT 5.08MM	101500
1616100000 Weidmuller	TERM BLOCK HDR 12POS VERT 3.5MM	565100
1065110000 Weidmuller	TERM BLOCK PLUG 7POS STR 5.08MM	120
1940800000 Weidmuller	TERM BLOCK PLUG 9POS STR 3.81MM	98
1065180000 Weidmuller	TERM BLOCK PLUG 7POS STR 5.08MM	119
1281760000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	0
1615920000 Weidmuller	TERM BLOCK PLUG 16POS STR 3.5MM	24
1980490000 Weidmuller	TERM BLOCK PLUG 3POS STR 7.62MM	163
1775702001 Weidmuller	TERM BLOCK HDR 12POS VERT 5.08MM	0
1838150000 Weidmuller	TERM BLOCK HDR 19POS VERT 5.08MM	100
1625780000 Weidmuller	TERM BLOCK PLUG 4POS STR 5MM	1805600
1838350000 Weidmuller	TERM BLOCK HDR 16POS VERT 5.08MM	100
2643040000 Weidmuller	TERM BLK HDR 2POS 90DEG 3.81MM	672672
1557410000 Weidmuller	TERM BLOCK PLUG 3POS 5.08MM	0
1955490000 Weidmuller	TERM BLOCK PLUG 10POS STR 5MM	288
1043430000 Weidmuller	TERM BLOCK PLUG 2POS STR 7.62MM	55

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