Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1716530000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	0
1946580000 Weidmuller	TERM BLOCK PLUG 4POS 5.08MM	180
1277940000 Weidmuller	TERM BLOCK PLUG 20POS STR 3.5MM	191974
1798760000 Weidmuller	TERM BLOCK PLUG 12POS 3.81MM	450
1527810000 Weidmuller	TERM BLOCK PLUG 16POS STR 5.08MM	42
1000070001 Weidmuller	TERM BLOCK PLUG 6POS 5.08MM	116
2641540000 Weidmuller	TERM BLK HDR 4POS 90DEG 3.5MM	768768
1760972001 Weidmuller	TERM BLOCK HDR 3POS VERT 3.5MM	0
1615530000 Weidmuller	TERM BLOCK HDR 2POS 90DEG 3.5MM	20965900
1793110000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.81MM	1
1614190000 Weidmuller	TERM BLOCK HDR 16POS 90DEG 3.5MM	880550
1794600000 Weidmuller	TERM BLOCK HDR 20POS VERT 3.5MM	30
1043370000 Weidmuller	TERM BLOCK PLUG 4POS STR 7.62MM	90
1730760000 Weidmuller	TERM BLOCK PLUG 8POS STR 5MM	0
1729000000 Weidmuller	TERM BLOCK HDR 16POS VERT 3.5MM	60
1793680000 Weidmuller	TERM BLOCK HDR 12POS VERT 3.81MM	0
1780650000 Weidmuller	TERM BLOCK HDR 24POS 5.08MM	60
1001220000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	200120
1357800000 Weidmuller	TERM BLOCK HDR 12POS 90DEG 3.5MM	0
1612130000 Weidmuller	TERM BLOCK PLUG 8POS STR 7MM	110

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