Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1147510000 Weidmuller	TERM BLOCK HDR 8POS VERT 5.08MM	20750
1799240000 Weidmuller	TERM BLOCK PLUG 12POS 3.81MM	1200
1969100000 Weidmuller	TERM BLOCK PLUG 3POS STR 3.81MM	200
1616160000 Weidmuller	TERM BLOCK HDR 4POS VERT 3.5MM	6701400
1043880000 Weidmuller	TERM BLOCK PLUG 3POS STR 7.62MM	200
1002330000 Weidmuller	TERM BLOCK PLUG 7POS 5.08MM	72
1727580000 Weidmuller	TERM BLOCK PLUG 10POS STR 3.5MM	25
1278120000 Weidmuller	TERM BLOCK PLUG 20POS STR 3.5MM	47
1002160000 Weidmuller	TERM BLOCK PLUG 9POS 5.08MM	60
1597390000 Weidmuller	TERM BLOCK PLUG 5POS STR 3.5MM	674080
1043440000 Weidmuller	TERM BLOCK PLUG 3POS STR 7.62MM	108
1792910000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.81MM	10
1838470000 Weidmuller	TERM BLOCK HDR 5POS VERT 5.08MM	295
1500160000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	0
1780540000 Weidmuller	TERM BLOCK HDR 13POS 5.08MM	100
1770750000 Weidmuller	TERM BLOCK PLUG 3POS 3.5MM	0
1793300000 Weidmuller	TERM BLOCK HDR 10POS 3.81MM	59
1837900000 Weidmuller	TERM BLOCK HDR 11POS VERT 5.08MM	100
1752992001 Weidmuller	TERM BLOCK HDR 3POS VERT 3.5MM	0
1780200000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 5.08MM	188

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