Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1626620000 Weidmuller	TERM BLOCK HDR 2POS VERT 5MM	55
2741510000 Weidmuller	PCB CONNECTOR, HEADER, 5.00MM PI	56
1943900000 Weidmuller	TERM BLOCK PLUG 11POS STR 5.08MM	68420
1601200000 Weidmuller	TERM BLOCK PLUG 13POS STR 5.08MM	98
1043960000 Weidmuller	TERM BLOCK PLUG 3POS STR 7.62MM	200
1716390000 Weidmuller	TERM BLOCK PLUG 9POS STR 5.08MM	0
1820790000 Weidmuller	TERM BLOCK HDR 13POS VERT 5.08MM	100
1277270000 Weidmuller	TERM BLOCK PLUG 4POS STR 3.5MM	37572640
1090600000 Weidmuller	TERM BLOCK HDR 9POS 90DEG 7.62MM	0
1728720000 Weidmuller	TERM BLOCK HDR 24POS 90DEG 3.5MM	108
1096040000 Weidmuller	TERM BLOCK HDR 3POS 90DEG 7.62MM	0
1630790000 Weidmuller	TERM BLOCK HDR 10POS VERT 5.08MM	44
1639260000 Weidmuller	TERM BLOCK PLUG 4POS 90DEG 3.5MM	0
1776442001 Weidmuller	TERM BLOCK HDR 10POS VERT 5.08MM	0
1206530000 Weidmuller	FP TERMINAL LG MPB	7
1596170000 Weidmuller	TERM BLOCK HDR 10POS 90DEG 5MM	19
1553710000 Weidmuller	TERM BLOCK PLUG 12POS 5.08MM	4590
1149400000 Weidmuller	TERM BLOCK HDR 2POS VERT 5.08MM	666
1775664001 Weidmuller	TERM BLOCK HDR 8POS VERT 5.08MM	500
1356460000 Weidmuller	TERM BLOCK PLUG 6POS STR 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