Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
2-1986722-2 TE Connectivity AMP Connectors	TERM BLOCK PLUG 22POS STR 3.81MM	0
30.369 Altech Corporation	HEADER PCB 19POS 5MM VERT	0
20020012-H061B01LF Anytek (Amphenol Anytek)	TERM BLOCK PLUG 6POS STR 5.08MM	0
691373500011B Würth Elektronik Midcom	TERM BLOCK PLUG 11POS STR 5.08MM	0
TBP01R1W-508-02BE CUI Devices	TERMINAL BLOCK, PLUGGABLE, W SCR	2553
1000870000 Weidmuller	TERM BLOCK PLUG 3POS STR 5.08MM	180
TBP01P1-508-03BE CUI Devices	TERMINAL BLOCK, PLUGGABLE, 5.08	2154
1773578 Phoenix Contact	TERM BLOCK PLUG 4POS STR 3.5MM	0
1793790000 Weidmuller	TERM BLOCK HDR 2POS VERT 3.81MM	330
1529360000 Weidmuller	TERM BLOCK PLUG 8POS STR 5.08MM	107100
1792930000 Weidmuller	TERM BLOCK PLUG 12POS STR 3.81MM	0
1760982001 Weidmuller	TERM BLOCK HDR 4POS VERT 3.5MM	0
25-E1400-06 NTE Electronics, Inc.	TERMINAL BLOCK EUROSTYLE	137
1737712 Phoenix Contact	TERM BLOCK PLUG 3POS 90DEG 7.5MM	0
1786905 Phoenix Contact	TERM BLOCK HDR 18POS 90DEG 3.5MM	31
OSTTS10315A On-Shore Technology, Inc.	TERM BLOCK PLUG 10POS 3.81MM	1414
1809348 Phoenix Contact	TERM BLOCK HDR 10POS VERT 5.08MM	0
1948300000 Weidmuller	TERM BLOCK PLUG 8POS 5.08MM	1884
0395033007 Woodhead - Molex	TERM BLOCK PLUG 7POS 90DEG 3.5MM	574
1788589 Phoenix Contact	TERM BLOCK HDR 6POS 90DEG 3.5MM	100

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