Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1069620000 Weidmuller	TERM BLOCK HDR 2POS 90DEG 5MM	0
1981930000 Weidmuller	TERM BLOCK PLUG 2POS 5.08MM	96
1729270000 Weidmuller	TERM BLOCK HDR 6POS VERT 3.5MM	0
1958610000 Weidmuller	TERM BLOCK PLUG 6POS 90DEG 5MM	271200
1060570000 Weidmuller	TERM BLOCK PLUG 3POS STR 7.62MM	100
1277860000 Weidmuller	TERM BLOCK PLUG 4POS STR 3.5MM	302
1729680000 Weidmuller	TERM BLOCK HDR 24POS VERT 3.5MM	191324
1780460000 Weidmuller	TERM BLOCK HDR 7POS 90DEG 5.08MM	198
1761682001 Weidmuller	TERM BLOCK HDR 16POS 90DEG 3.5MM	148100
1615750000 Weidmuller	TERM BLOCK PLUG 14POS STR 3.5MM	7371980
1510460000 Weidmuller	TERM BLOCK HDR 3POS 90DEG 5.08MM	532600
1838460000 Weidmuller	TERM BLOCK HDR 4POS VERT 5.08MM	449
1761562001 Weidmuller	TERM BLOCK HDR 4POS 90DEG 3.5MM	338
1727570000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.5MM	0
1730710000 Weidmuller	TERM BLOCK PLUG 3POS STR 5MM	258
1398920000 Weidmuller	PCB PLUG-IN CONNECTOR, FEMALE PL	25
2642130000 Weidmuller	TERM BLK PLUG 6POS 180DEG 3.81MM	210210
1838590000 Weidmuller	TERM BLOCK HDR 17POS VERT 5.08MM	54
1014410000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	95
1948080000 Weidmuller	TERM BLOCK PLUG 10POS 5.08MM	714864

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