Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1581080000 Weidmuller	TERM BLOCK HDR 24POS 90DEG 5MM	9120
1728020000 Weidmuller	TERM BLOCK HDR 12POS 90DEG 3.5MM	777858
1278240000 Weidmuller	TERM BLOCK PLUG 6POS STR 3.5MM	335
1000090001 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	84
1289500000 Weidmuller	TERM BLOCK HDR 14POS 90DEG 3.5MM	45
1792840000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.81MM	472000
1728980000 Weidmuller	TERM BLOCK HDR 12POS VERT 3.5MM	164
1013540000 Weidmuller	TERM BLOCK PLUG 12POS STR 5.08MM	0
1616230000 Weidmuller	TERM BLOCK HDR 12POS VERT 3.5MM	130700
1838480000 Weidmuller	TERM BLOCK HDR 6POS VERT 5.08MM	96
1289440000 Weidmuller	TERM BLOCK HDR 36POS 90DEG 3.5MM	0
2649560000 Weidmuller	TERM BLK HDR 2POS 180DEG 5.08MM	660
1605100000 Weidmuller	TERM BLOCK HDR 5POS 90DEG 3.5MM	356200
1552810000 Weidmuller	TERM BLOCK PLUG 3POS 5.08MM	542
1862480000 Weidmuller	TERM BLOCK HDR 3POS 90DEG 3.81MM	180400
1571250000 Weidmuller	TERM BLOCK HDR 15POS 90DEG 5MM	1087850
1290120000 Weidmuller	TERM BLOCK HDR 20POS VERT 3.5MM	48
1610190000 Weidmuller	TERM BLOCK PLUG 7POS STR 3.5MM	921296
1649420000 Weidmuller	TERM BLOCK PLUG 7POS STR 5.08MM	4551050
1089660000 Weidmuller	TERM BLOCK HDR 7POS 90DEG 7.62MM	0

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