Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1776462001 Weidmuller	TERM BLOCK HDR 12POS VERT 5.08MM	0
1500110000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	294914
1001030000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	0
1000120001 Weidmuller	TERM BLOCK PLUG 11POS 5.08MM	60150
1016350000 Weidmuller	TERM BLOCK PLUG 3POS STR 5MM	144
1728340000 Weidmuller	TERM BLOCK HDR 12POS 90DEG 3.5MM	0
1289510000 Weidmuller	TERM BLOCK HDR 16POS 90DEG 3.5MM	123192
1625720000 Weidmuller	TERM BLOCK PLUG 20POS STR 5MM	40
1278310000 Weidmuller	TERM BLOCK PLUG 20POS STR 3.5MM	84
1776394001 Weidmuller	TERM BLOCK HDR 5POS VERT 5.08MM	500
1351460000 Weidmuller	TERM BLOCK HDR 2POS 90DEG 5.08MM	2272000
1013580000 Weidmuller	TERM BLOCK PLUG 16POS STR 5.08MM	0
1615730000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.5MM	39884
1630800000 Weidmuller	TERM BLOCK HDR 11POS VERT 5.08MM	100
2643250000 Weidmuller	TERM BLK HDR 4POS 180DEG 3.81MM	480480
1838380000 Weidmuller	TERM BLOCK HDR 19POS VERT 5.08MM	100
1353300000 Weidmuller	PCB PLUG-IN CONNECTOR, FEMALE PL	24
2000430000 Weidmuller	PCB PLUG-IN CONNECTOR, FEMALE PL	18
1622940000 Weidmuller	TERM BLOCK HDR 2POS 90DEG 5.08MM	748
1944830000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	289180

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