Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1277830000 Weidmuller	TERM BLOCK PLUG 32POS STR 3.5MM	24
1511460000 Weidmuller	TERM BLOCK HDR 13POS 5.08MM	86
1277280000 Weidmuller	TERM BLOCK PLUG 6POS STR 3.5MM	100
1513260000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 5.08MM	154
1235800000 Weidmuller	TERM BLOCK PLUG 6POS STR 3.81MM	100
1971590000 Weidmuller	TERM BLOCK PLUG 4POS STR 3.81MM	100
1515910000 Weidmuller	TERM BLOCK HDR 12POS 5.08MM	0
1065160000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	10064
1748280000 Weidmuller	TERM BLOCK PLUG 28POS STR 3.5MM	120
1728000000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.5MM	1227120
1949060000 Weidmuller	TERM BLOCK PLUG 6POS 5.08MM	6060
1793500000 Weidmuller	TERM BLOCK HDR 16POS 3.81MM	0
1605130000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 3.5MM	397300
1321760000 Weidmuller	TERM BLOCK HDR 6POS 90DEG 5.08MM	14050
1642290000 Weidmuller	TERM BLOCK HDR 24POS 90DEG 3.5MM	111130
1838390000 Weidmuller	TERM BLOCK HDR 20POS VERT 5.08MM	80
1515310000 Weidmuller	TERM BLOCK HDR 6POS 90DEG 5.08MM	0
1946260000 Weidmuller	TERM BLOCK PLUG 3POS 5.08MM	120
1065130000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	200
1581360000 Weidmuller	TERM BLOCK HDR 6POS VERT 5MM	284

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