Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1830648 Phoenix Contact	TERM BLOCK HDR 7POS VERT 3.81MM	33
5452115 Phoenix Contact	TERM BLOCK HDR 6POS VERT 3.81MM	0
1830295 Phoenix Contact	TERM BLOCK HDR 12POS VERT 3.81MM	50
1821096 Phoenix Contact	TERM BLOCK PLUG 2POS STR 2.54MM	815
5444660 Phoenix Contact	TERM BLOCK HDR 4POS VERT 3.81MM	167
1763045 Phoenix Contact	TERM BLOCK HDR 6POS VERT 5MM	0
5433707 Phoenix Contact	TERM BLOCK HDR 6POS 90DEG 5.08MM	700
1804988 Phoenix Contact	TERM BLOCK PLUG 10POS STR 7.62MM	35
1803439 Phoenix Contact	TERM BLOCK HDR 3POS VERT 3.81MM	5837
1786899 Phoenix Contact	TERM BLOCK PLUG 8POS STR 5MM	74350
1902275 Phoenix Contact	TERM BLOCK PLUG 18POS STR 5.08MM	10
1786307 Phoenix Contact	TERM BLOCK PLUG 15POS STR 5.08MM	42
1996391 Phoenix Contact	TERM BLOCK HDR 9POS 10.16MM	0
1809501 Phoenix Contact	TERM BLOCK PLUG 2POS STR 5.08MM	50
1790124 Phoenix Contact	TERM BLOCK PLUG 8POS STR 3.5MM	0
1785971 Phoenix Contact	TERM BLOCK HDR 5POS VERT 5.08MM	261
1790234 Phoenix Contact	TERM BLOCK PLUG 30POS STR 3.5MM	97
1803426 Phoenix Contact	TERM BLOCK HDR 2POS VERT 3.81MM	1392537250
1952102 Phoenix Contact	TERM BLOCK PLUG 10POS STR 3.5MM	53
1737077 Phoenix Contact	TERM BLOCK HDR 8POS 90DEG 3.5MM	200

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