Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1958650000 Weidmuller	TERM BLOCK PLUG 2POS 90DEG 5MM	21
1290080000 Weidmuller	TERM BLOCK HDR 14POS VERT 3.5MM	0
1770800000 Weidmuller	TERM BLOCK PLUG 8POS 3.5MM	0
1946280000 Weidmuller	TERM BLOCK PLUG 5POS 5.08MM	119
1948060000 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	2226
1173520000 Weidmuller	TERM BLOCK PLUG 4POS STR 7.62MM	10940
1940740000 Weidmuller	TERM BLOCK PLUG 3POS STR 3.81MM	247
1596130000 Weidmuller	TERM BLOCK HDR 4POS VERT 5MM	48300
1690200000 Weidmuller	TERM BLOCK PLUG 3POS STR 3.5MM	104
1633680000 Weidmuller	TERM BLOCK HDR 24POS 90DEG 3.5MM	39560
1277480000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.5MM	0
1970220000 Weidmuller	TERM BLOCK PLUG 15POS STR 3.81MM	90
1982740000 Weidmuller	TERM BLOCK PLUG 6POS 5.08MM	68
1716400000 Weidmuller	TERM BLOCK PLUG 10POS STR 5.08MM	16150
1727700000 Weidmuller	TERM BLOCK PLUG 18POS STR 3.5MM	4454
1730720000 Weidmuller	TERM BLOCK PLUG 4POS STR 5MM	100
1626040000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 5MM	30050
1016410000 Weidmuller	TERM BLOCK PLUG 8POS STR 5MM	72
1082140000 Weidmuller	TERM BLOCK PLUG 9POS STR 7.62MM	50
1753002001 Weidmuller	TERM BLOCK HDR 4POS VERT 3.5MM	21

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