Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1970550000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.81MM	94
1148670000 Weidmuller	TERM BLOCK HDR 3POS VERT 5.08MM	195
1615550000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 3.5MM	15521400
1761002001 Weidmuller	TERM BLOCK HDR 6POS VERT 3.5MM	0
1793090000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.81MM	62
1646110000 Weidmuller	TERM BLOCK HDR 10POS 5.08MM	200
1277320000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.5MM	38
1581510000 Weidmuller	TERM BLOCK HDR 21POS VERT 5MM	100
1949080000 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	32126
1841800000 Weidmuller	TERM BLOCK HDR 19POS 90DEG 3.5MM	1241040
1761552001 Weidmuller	TERM BLOCK HDR 3POS 90DEG 3.5MM	40100
1615660000 Weidmuller	TERM BLOCK HDR 16POS 90DEG 3.5MM	0
1838630000 Weidmuller	TERM BLOCK HDR 21POS VERT 5.08MM	60
1760962001 Weidmuller	TERM BLOCK HDR 2POS VERT 3.5MM	0
1971850000 Weidmuller	TERM BLOCK PLUG 9POS STR 3.81MM	50
1753022001 Weidmuller	TERM BLOCK HDR 6POS VERT 3.5MM	50
1290330000 Weidmuller	TERM BLOCK HDR 24POS VERT 3.5MM	0
1958620000 Weidmuller	TERM BLOCK PLUG 5POS 90DEG 5MM	140144
1980510000 Weidmuller	TERM BLOCK PLUG 5POS STR 7.62MM	90
1614160000 Weidmuller	TERM BLOCK HDR 2POS 90DEG 3.5MM	1174

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