Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1355760000 Weidmuller	TERM BLOCK HDR 22POS VERT 5.08MM	20
1278130000 Weidmuller	TERM BLOCK PLUG 22POS STR 3.5MM	70
1290090000 Weidmuller	TERM BLOCK HDR 16POS VERT 3.5MM	0
1277690000 Weidmuller	TERM BLOCK PLUG 10POS STR 3.5MM	144
1626420000 Weidmuller	TERM BLOCK HDR 5POS VERT 5MM	451700
1775592001 Weidmuller	TERM BLOCK HDR 4POS VERT 5.08MM	0
1606780000 Weidmuller	TERM BLOCK PLUG 16POS STR 3.5MM	28
1356660000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	0
1940840000 Weidmuller	TERM BLOCK PLUG 13POS STR 3.81MM	72
1147340000 Weidmuller	TERM BLOCK HDR 4POS 90DEG 5.08MM	600300
1794860000 Weidmuller	TERM BLOCK HDR 6POS 90DEG 3.5MM	53
1615540000 Weidmuller	TERM BLOCK HDR 3POS 90DEG 3.5MM	270
1227420000 Weidmuller	TERM BLOCK PLUG 6POS STR 7.62MM	60
2741460000 Weidmuller	PCB CONNECTOR, HEADER, 5.00MM PI	105
1948250000 Weidmuller	TERM BLOCK PLUG 3POS 5.08MM	166240
1626220000 Weidmuller	TERM BLOCK HDR 3POS 90DEG 5MM	274
1146340000 Weidmuller	TERM BLOCK HDR 3POS VERT 5.08MM	1422700
1524710000 Weidmuller	TERM BLOCK HDR 8POS VERT 5.08MM	435400
1838130000 Weidmuller	TERM BLOCK HDR 17POS VERT 5.08MM	100
1630780000 Weidmuller	TERM BLOCK HDR 9POS VERT 5.08MM	112

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