Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1954470000 Weidmuller	TERM BLOCK PLUG 4POS STR 5MM	1771530
1838160000 Weidmuller	TERM BLOCK HDR 20POS VERT 5.08MM	80
1614200000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.5MM	28
1615700000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.5MM	485
1798750000 Weidmuller	TERM BLOCK PLUG 10POS 3.81MM	0
1726970000 Weidmuller	TERM BLOCK HDR 4POS VERT 5.08MM	0
1646250000 Weidmuller	TERM BLOCK HDR 2POS VERT 5.08MM	3581620
1147450000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 5.08MM	133
1527110000 Weidmuller	TERM BLOCK PLUG 9POS STR 5.08MM	49100
1630750000 Weidmuller	TERM BLOCK HDR 6POS VERT 5.08MM	121
1043890000 Weidmuller	TERM BLOCK PLUG 4POS STR 7.62MM	100
2642090000 Weidmuller	TERM BLK PLUG 2POS 180DEG 3.81MM	450500
1798730000 Weidmuller	TERM BLOCK PLUG 6POS 3.81MM	0
2641910000 Weidmuller	TERM BLK PLUG 3POS 90DEG 3.81MM	300300
1837990000 Weidmuller	TERM BLOCK HDR 3POS VERT 5.08MM	461
1014430000 Weidmuller	TERM BLOCK PLUG 7POS STR 5.08MM	70
1649170000 Weidmuller	TERM BLOCK HDR 16POS VERT 5.08MM	0
1626410000 Weidmuller	TERM BLOCK HDR 4POS VERT 5MM	595
1815200000 Weidmuller	TERM BLOCK PLUG 2POS STR	0
1820770000 Weidmuller	TERM BLOCK HDR 5POS VERT 5.08MM	105

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