Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1792553 Phoenix Contact	TERM BLOCK PLUG 5POS 270DEG 5MM	0
1779129 Phoenix Contact	TERM BLOCK HDR 5POS VERT 3.5MM	135
1768910 Phoenix Contact	TERM BLOCK PLUG 12POS STR 3.5MM	17
1962639 Phoenix Contact	TERM BLOCK PLUG 5POS STR 5.08MM	6850
1804661 Phoenix Contact	TERM BLOCK PLUG 8POS STR 5.08MM	41
1852383 Phoenix Contact	TERM BLOCK PLUG 4POS STR 3.81MM	20
1952843 Phoenix Contact	TERM BLOCK HDR 16POS VERT 3.5MM	82
1786200 Phoenix Contact	TERM BLOCK PLUG 5POS STR 5.08MM	422
1881354 Phoenix Contact	TERM BLOCK PLUG 5POS STR 2.5MM	971
1808996 Phoenix Contact	TERM BLOCK PLUG 13POS STR 5.08MM	0
5452075 Phoenix Contact	TERM BLOCK HDR 8POS 90DEG 5.08MM	1700
1910416 Phoenix Contact	TERM BLOCK PLUG 8POS STR 5MM	49
1762774 Phoenix Contact	TERM BLOCK HDR 20POS 90DEG 5MM	24
1911978 Phoenix Contact	TERM BLOCK PLUG 3POS STR 5.08MM	2222000
1766372 Phoenix Contact	TERM BLOCK HDR 5POS 90DEG 7.5MM	237
1910678 Phoenix Contact	TERM BLOCK PLUG 2POS STR 5MM	25
1754623 Phoenix Contact	TERM BLOCK PLUG 8POS STR 5.08MM	7
1740291 Phoenix Contact	TERM BLOCK HDR 6POS VERT 5.08MM	226500
1843897 Phoenix Contact	TERM BLOCK HDR 12POS 90DEG 3.5MM	14
1758681 Phoenix Contact	TERM BLOCK HDR 10POS 5.08MM	107

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