Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1792139 Phoenix Contact	TERM BLOCK PLUG 14POS 90DEG 5MM	72
1082140000 Weidmuller	TERM BLOCK PLUG 9POS STR 7.62MM	50
EDSTL955/7 On-Shore Technology, Inc.	TERM BLOCK HDR 7POS VERT 5MM	125
EBQA-05-C Adam Tech	EURO BLOCK 5P	875
1753002001 Weidmuller	TERM BLOCK HDR 4POS VERT 3.5MM	21
0395032004 Woodhead - Molex	TERM BLOCK PLUG 4POS 3.5MM	2908
1843091 Phoenix Contact	TERM BLOCK HDR 8POS 90DEG 3.81MM	1431
1836748 Phoenix Contact	TERM BLOCK HDR 8POS BLK	100
1817987 Phoenix Contact	TERM BLOCK HDR 20POS 3.81MM	0
1912663 Phoenix Contact	TERM BLOCK PLUG 6POS 5.08MM	56
0395365004 Woodhead - Molex	TERM BLOCK HDR 4POS 90DEG 5.08MM	870
691304530002 Würth Elektronik Midcom	WR-TBL SERIES 3045_5.08 MM_SCREW	237
14310214102000 HARTING	TERM BLOCK PLUG 2POS STR 3.5MM	194
1759033 Phoenix Contact	TERM BLOCK HDR 4POS 90DEG 5.08MM	8754750
XW4N-15D1-S Omron Electronics Components	SOCKET,SINGLE-ROW,,TIN REFLOW,	0
1845069 Phoenix Contact	TERM BLOCK HDR 12POS 2.54MM	0
3061729 Phoenix Contact	TERM BLOCK PLUG 1POS STR	0
1-284047-2 TE Connectivity AMP Connectors	TERM BLOCK PLUG 12POS 5.08MM	0
691352410008 Würth Elektronik Midcom	TERM BLOCK PLUG 8POS 7.62MM	0
TBP01R2-508-12BE CUI Devices	TERMINAL BLOCK, PLUGGABLE, 5.08,	316

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