Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1748170000 Weidmuller	TERM BLOCK PLUG 6POS STR 3.5MM	482
1982910000 Weidmuller	TERM BLOCK PLUG 4POS 5.08MM	18060
1014420000 Weidmuller	TERM BLOCK PLUG 6POS STR 5.08MM	84
1615570000 Weidmuller	TERM BLOCK HDR 6POS 90DEG 3.5MM	445
1616050000 Weidmuller	TERM BLOCK HDR 6POS VERT 3.5MM	372850
1727670000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.5MM	113
1842330000 Weidmuller	TERM BLOCK HDR 3POS VERT 3.5MM	562200
1841660000 Weidmuller	TERM BLOCK HDR 5POS 90DEG 3.5MM	8546500
1013120000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	87
1799200000 Weidmuller	TERM BLOCK PLUG 5POS 3.81MM	7650
1095640000 Weidmuller	TERM BLOCK HDR 2POS 90DEG 7.62MM	300
1638820000 Weidmuller	TERM BLOCK PLUG 6POS 90DEG 3.5MM	1013
1001620000 Weidmuller	TERM BLOCK PLUG 11POS 5.08MM	60
1798710000 Weidmuller	TERM BLOCK PLUG 4POS 3.81MM	39
1838020000 Weidmuller	TERM BLOCK HDR 6POS VERT 5.08MM	300
1290270000 Weidmuller	TERM BLOCK HDR 14POS VERT 3.5MM	0
1924780000 Weidmuller	TERM BLOCK PLUG 9POS STR 10.16MM	20
1948320000 Weidmuller	TERM BLOCK PLUG 10POS 5.08MM	1
1519610000 Weidmuller	TERM BLOCK HDR 3POS VERT 5.08MM	7
1557760000 Weidmuller	TERM BLOCK PLUG 6POS 5.08MM	114120

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