Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1043810000 Weidmuller	TERM BLOCK PLUG 4POS STR 7.62MM	100
1629230000 Weidmuller	TERM BLOCK HDR 12POS VERT 7.5MM	0
2647720000 Weidmuller	TERM BLK PLUG 3POS 90DEG 5.08MM	9090
1581460000 Weidmuller	TERM BLOCK HDR 16POS VERT 5MM	115
1581530000 Weidmuller	TERM BLOCK HDR 23POS VERT 5MM	85
1638900000 Weidmuller	TERM BLOCK PLUG 14POS 3.5MM	0
1069640000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 5MM	1001
1043450000 Weidmuller	TERM BLOCK PLUG 4POS STR 7.62MM	100
1001570000 Weidmuller	TERM BLOCK PLUG 6POS 5.08MM	120
1943200000 Weidmuller	TERM BLOCK HDR 4POS VERT 3.81MM	221
1277310000 Weidmuller	B2CF 3.50/10/180 SN OR BX	98
1837950000 Weidmuller	TERM BLOCK HDR 22POS VERT 5.08MM	80
1640220000 Weidmuller	TERM BLOCK PLUG 8POS 3.5MM	7148
1148490000 Weidmuller	TERM BLOCK HDR 2POS VERT 5.08MM	0
1610550000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	981050
2649580000 Weidmuller	TERM BLK HDR 3POS 180DEG 5.08MM	250250
1798720000 Weidmuller	TERM BLOCK PLUG 5POS 3.81MM	20
1000970000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	85
1065150000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	100
1013720000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	194432

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