Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1798980000 Weidmuller	TERM BLOCK PLUG 10POS 3.81MM	0
2741690000 Weidmuller	PCB CONNECTOR, PLUG, 5.00MM PITC	0
1793810000 Weidmuller	TERM BLOCK HDR 4POS VERT 3.81MM	952550
2641140000 Weidmuller	TERM BLK HDR 2POS 90DEG 3.5MM	672672
1277640000 Weidmuller	TERM BLOCK PLUG 36POS STR 3.5MM	30
2643460000 Weidmuller	TERM BLK HDR 6POS 90DEG 3.81MM	758
1841650000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 3.5MM	280
1278300000 Weidmuller	TERM BLOCK PLUG 18POS STR 3.5MM	0
1580920000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 5MM	0
1770740000 Weidmuller	TERM BLOCK PLUG 2POS 3.5MM	0
1944340000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	94
1001200000 Weidmuller	TERM BLOCK PLUG 7POS STR 5.08MM	109
1150100000 Weidmuller	TERM BLOCK HDR 3POS 90DEG 5.08MM	283
1499560000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	167180
1982310000 Weidmuller	TERM BLOCK PLUG 2POS 5.08MM	270
1774982001 Weidmuller	TERM BLOCK HDR 24POS 5.08MM	0
1014140000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	1277860
2646190000 Weidmuller	TERM BLK HDR 6POS 180DEG 5.00MM	200200
1043850000 Weidmuller	TERM BLOCK PLUG 4POS STR 7.62MM	92
1728060000 Weidmuller	TERM BLOCK HDR 20POS 90DEG 3.5MM	1348

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