Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1524760000 Weidmuller	TERM BLOCK HDR 8POS VERT 5.08MM	41810050
1943840000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	1882304
1728030000 Weidmuller	TERM BLOCK HDR 14POS 90DEG 3.5MM	18
1946340000 Weidmuller	TERM BLOCK PLUG 11POS 5.08MM	60
1638780000 Weidmuller	TERM BLOCK PLUG 2POS 90DEG 3.5MM	1531774
1970040000 Weidmuller	TERM BLOCK PLUG 9POS STR 3.81MM	60300
1013090000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	20772
1709370000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	9
1748490000 Weidmuller	TERM BLOCK PLUG 6POS STR 3.5MM	0
1513660000 Weidmuller	TERM BLOCK HDR 12POS 5.08MM	147
1943600000 Weidmuller	TERM BLOCK PLUG 4POS STR 5.08MM	4074100
1155630000 Weidmuller	TERM BLOCK HDR 7POS 90DEG 5.08MM	2731150
1012750000 Weidmuller	TERM BLOCK PLUG 12POS STR 5.08MM	48
1625990000 Weidmuller	TERM BLOCK HDR 2POS 90DEG 5MM	993
1772980000 Weidmuller	TERM BLOCK PLUG 24POS 3.5MM	196
1290140000 Weidmuller	TERM BLOCK HDR 24POS VERT 3.5MM	0
2647250000 Weidmuller	TERM BLK PLUG 2POS 180DEG 5.08MM	325360
1000260001 Weidmuller	TERM BLOCK PLUG 6POS 5.08MM	84168
2642660000 Weidmuller	TERM BLK PLUG 2POS 180DEG 3.81MM	300300
1638920000 Weidmuller	TERM BLOCK PLUG 16POS 3.5MM	1

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