Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1780610000 Weidmuller	TERM BLOCK HDR 20POS 5.08MM	60
1948370000 Weidmuller	TERM BLOCK PLUG 15POS 5.08MM	0
1794580000 Weidmuller	TERM BLOCK HDR 16POS VERT 3.5MM	14
2649140000 Weidmuller	TERM BLK HDR 4POS 90DEG 5.08MM	300
1636970000 Weidmuller	TERM BLOCK PLUG 10POS 90DEG 5MM	0
2647040000 Weidmuller	TERM BLK PLUG 4POS 90DEG 5.08MM	98108
1838030000 Weidmuller	TERM BLOCK HDR 7POS VERT 5.08MM	180
1278270000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.5MM	4566
1748190000 Weidmuller	TERM BLOCK PLUG 10POS STR 3.5MM	275
1805000000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.5MM	2881200
1770940000 Weidmuller	TERM BLOCK PLUG 2POS STR 3.5MM	0
1012710000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	111
1792800000 Weidmuller	TERM BLOCK PLUG 5POS STR 3.81MM	100
1515010000 Weidmuller	TERM BLOCK HDR 3POS 90DEG 5.08MM	0
2642480000 Weidmuller	TERM BLK PLUG 3POS 90DEG 3.81MM	155180
1837860000 Weidmuller	TERM BLOCK HDR 2POS VERT 5.08MM	33125000
1277510000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.5MM	0
1946640000 Weidmuller	TERM BLOCK PLUG 10POS 5.08MM	72216
1044010000 Weidmuller	TERM BLOCK PLUG 4POS STR 7.62MM	100
1775822001 Weidmuller	TERM BLOCK HDR 24POS VERT 5.08MM	0

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