Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1525710000 Weidmuller	TERM BLOCK HDR 18POS VERT 5.08MM	140
1838640000 Weidmuller	TERM BLOCK HDR 22POS VERT 5.08MM	80
1793670000 Weidmuller	TERM BLOCK HDR 10POS VERT 3.81MM	0
1980500000 Weidmuller	TERM BLOCK PLUG 4POS STR 7.62MM	100
1723140000 Weidmuller	TERM BLOCK PLUG 5POS STR 5MM	390
1277840000 Weidmuller	TERM BLOCK PLUG 34POS STR 3.5MM	14
1943660000 Weidmuller	TERM BLOCK PLUG 10POS STR 5.08MM	0
1943890000 Weidmuller	TERM BLOCK PLUG 10POS STR 5.08MM	2201512
1794240000 Weidmuller	TERM BLOCK HDR 12POS 90DEG 3.5MM	420
1557910000 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	57
1954350000 Weidmuller	TERM BLOCK PLUG 16POS STR 5MM	0
1683230000 Weidmuller	TERM BLOCK HDR 3POS 90DEG 3.5MM	2372000
1290260000 Weidmuller	TERM BLOCK HDR 12POS VERT 3.5MM	0
2641520000 Weidmuller	TERM BLK HDR 2POS 90DEG 3.5MM	700700
1639250000 Weidmuller	TERM BLOCK PLUG 3POS 90DEG 3.5MM	0
1013690000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	381120
1000490001 Weidmuller	TERM BLOCK PLUG 10POS 5.08MM	60
1243160000 Weidmuller	TERM BLOCK HDR 8POS VERT 5.08MM	0
1000170001 Weidmuller	TERM BLOCK PLUG 16POS 5.08MM	432
1838260000 Weidmuller	TERM BLOCK HDR 7POS VERT 5.08MM	250

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