Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1970170000 Weidmuller	TERM BLOCK PLUG 11POS STR 3.81MM	100
1512660000 Weidmuller	TERM BLOCK HDR 2POS 90DEG 5.08MM	561800
1615870000 Weidmuller	TERM BLOCK PLUG 11POS STR 3.5MM	48
1820600000 Weidmuller	TERM BLOCK HDR 3POS VERT 5.08MM	294216
1612200000 Weidmuller	TERM BLOCK PLUG 10POS 90DEG 7MM	1
1526410000 Weidmuller	TERM BLOCK PLUG 2POS STR 5.08MM	525
1432860000 Weidmuller	CH20M22 S PSCSC LGY	139
1349460000 Weidmuller	TERM BLOCK HDR 5POS VERT 5.08MM	1341000
1289290000 Weidmuller	TERM BLOCK HDR 10POS 90DEG 3.5MM	0
1761582001 Weidmuller	TERM BLOCK HDR 6POS 90DEG 3.5MM	89
1242860000 Weidmuller	TERM BLOCK HDR 5POS VERT 5.08MM	63200
1065080000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	100
1604580000 Weidmuller	TERM BLOCK HDR 13POS VERT 3.5MM	54
1526710000 Weidmuller	TERM BLOCK PLUG 5POS STR 5.08MM	94100
1095670000 Weidmuller	TERM BLOCK HDR 5POS 90DEG 7.62MM	96
1620440000 Weidmuller	TERM BLOCK PLUG 24POS STR 3.5MM	36
1081610000 Weidmuller	TERM BLOCK PLUG 6POS STR 7.62MM	50
1838290000 Weidmuller	TERM BLOCK HDR 10POS VERT 5.08MM	0
1552760000 Weidmuller	TERM BLOCK PLUG 2POS 5.08MM	250
1347060000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 5.08MM	341100

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