Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1944890000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	90
2642510000 Weidmuller	TERM BLK PLUG 6POS 90DEG 3.81MM	108108
2741440000 Weidmuller	PCB CONNECTOR, HEADER, 5.00MM PI	160
1982940000 Weidmuller	TERM BLOCK PLUG 7POS 5.08MM	55
1610540000 Weidmuller	TERM BLOCK PLUG 7POS STR 5.08MM	198800
1626640000 Weidmuller	TERM BLOCK HDR 5POS VERT 5MM	305
1059600000 Weidmuller	TERM BLOCK PLUG 4POS STR 7.62MM	82500
1946590000 Weidmuller	TERM BLOCK PLUG 5POS 5.08MM	144216
1146870000 Weidmuller	TERM BLOCK HDR 8POS VERT 5.08MM	50
1729640000 Weidmuller	TERM BLOCK HDR 16POS VERT 3.5MM	412
1016430000 Weidmuller	TERM BLOCK PLUG 10POS STR 5MM	59
1612190000 Weidmuller	TERM BLOCK PLUG 10POS STR 7MM	1630
1794210000 Weidmuller	TERM BLOCK HDR 6POS 90DEG 3.5MM	175
2013920000 Weidmuller	LUP 10.16/09/90V 5.0SN BK BX	20
1013740000 Weidmuller	TERM BLOCK PLUG 7POS STR 5.08MM	82432
1629210000 Weidmuller	TERM BLOCK HDR 10POS VERT 7.5MM	2350
1500910000 Weidmuller	TERM BLOCK PLUG 16POS STR 5.08MM	0
1016390000 Weidmuller	TERM BLOCK PLUG 7POS STR 5MM	72
2014170000 Weidmuller	LUP 10.16/08/90 5.0SN BK BX	20
1943680000 Weidmuller	TERM BLOCK PLUG 12POS STR 5.08MM	0

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