Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1630720000 Weidmuller	TERM BLOCK HDR 3POS VERT 5.08MM	1479240
1639380000 Weidmuller	TERM BLOCK PLUG 16POS 3.5MM	0
1776404001 Weidmuller	TERM BLOCK HDR 6POS VERT 5.08MM	500
1930050000 Weidmuller	TERM BLOCK PLUG 2POS STR 7.62MM	446100
1043460000 Weidmuller	TERM BLOCK PLUG 5POS STR 7.62MM	100
1798740000 Weidmuller	TERM BLOCK PLUG 8POS 3.81MM	4
1982780000 Weidmuller	TERM BLOCK PLUG 10POS 5.08MM	72
1614240000 Weidmuller	TERM BLOCK HDR 2POS VERT 3.5MM	0
1728640000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.5MM	84
2647020000 Weidmuller	TERM BLK PLUG 2POS 90DEG 5.08MM	216216
1970570000 Weidmuller	TERM BLOCK PLUG 9POS STR 3.81MM	116
1775932001 Weidmuller	TERM BLOCK HDR 3POS VERT 5.08MM	42
1615490000 Weidmuller	TERM BLOCK HDR 12POS 90DEG 3.5MM	198
2641150000 Weidmuller	TERM BLK HDR 3POS 90DEG 3.5MM	576576
1982960000 Weidmuller	TERM BLOCK PLUG 9POS 5.08MM	60
1948010000 Weidmuller	TERM BLOCK PLUG 3POS 5.08MM	711560
1940830000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.81MM	43950
1615840000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.5MM	546336
1639070000 Weidmuller	TERM BLOCK PLUG 8POS 90DEG 3.5MM	0
1943860000 Weidmuller	TERM BLOCK PLUG 7POS STR 5.08MM	9048

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