Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1762142001 Weidmuller	TERM BLOCK HDR 16POS 90DEG 3.5MM	0
2647750000 Weidmuller	TERM BLK PLUG 6POS 90DEG 5.08MM	7272
1282360000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	71252
1727710000 Weidmuller	TERM BLOCK PLUG 20POS STR 3.5MM	11748
1156600000 Weidmuller	TERM BLOCK PLUG 2POS STR 10.16MM	0
1979350000 Weidmuller	TERM BLOCK PLUG 10POS 90DEG 5MM	58252
1646280000 Weidmuller	TERM BLOCK HDR 5POS VERT 5.08MM	86144
1013510000 Weidmuller	TERM BLOCK PLUG 9POS STR 5.08MM	36
1728320000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.5MM	0
1761602001 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.5MM	8150
1231710000 Weidmuller	TERM BLOCK PLUG 7POS STR 3.81MM	95
1557460000 Weidmuller	TERM BLOCK PLUG 3POS 5.08MM	155
1798590000 Weidmuller	TERM BLOCK PLUG 6POS 3.81MM	0
1971780000 Weidmuller	TERM BLOCK PLUG 7POS STR 3.81MM	10050
1519510000 Weidmuller	TERM BLOCK HDR 2POS VERT 5.08MM	5885300
1499810000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	0
1060500000 Weidmuller	TERM BLOCK PLUG 2POS STR 7.62MM	139
1616020000 Weidmuller	TERM BLOCK HDR 3POS VERT 3.5MM	3543400
1277460000 Weidmuller	TERM BLOCK PLUG 4POS STR 3.5MM	127
1838040000 Weidmuller	TERM BLOCK HDR 8POS VERT 5.08MM	162

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