Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
1513260000 Weidmuller	TERM BLOCK HDR 8POS 90DEG 5.08MM	154
TBP02R2-381-14BE CUI Devices	TERMINAL BLOCK, PLUGGABLE, 3.81,	0
1875425 Phoenix Contact	TERM BLOCK HDR 2POS VERT 3.81MM	665
1840476 Phoenix Contact	TERM BLOCK PLUG 13POS STR 3.5MM	50
OSTTH080160 On-Shore Technology, Inc.	TERM BLOCK PLUG 8POS 90DEG 5MM	0
1-1986722-3 TE Connectivity AMP Connectors	TERM BLOCK PLUG 13POS STR 3.81MM	0
1998849 Phoenix Contact	TERM BLOCK HDR 8POS VERT 10.16MM	0
691352710007 Würth Elektronik Midcom	TERM BLOCK PLUG 7POS 5MM	71
691312410005 Würth Elektronik Midcom	TERM BLOCK HDR 5POS 90DEG 7.62MM	0
1860853 Phoenix Contact	CONN TERM BLOCK PLG 10POS 5.08MM	55
1877627 Phoenix Contact	TERM BLOCK HDR 4POS 90DEG 5.08MM	0
691353500009 Würth Elektronik Midcom	5.08 MM TERMINAL BLOCK PLUG, VER	59
EBRA-05-B Adam Tech	EURO BLOCK 5P	493
EDSTL950/24 On-Shore Technology, Inc.	TERM BLOCK HDR 24POS 90DEG 5MM	0
EDSTLZ956/4 On-Shore Technology, Inc.	TERM BLOCK HDR 4POS VERT 5.08MM	94
5452217 Phoenix Contact	TERM BLOCK PLUG 6POS STR 5MM	0
1-2342084-7 TE Connectivity AMP Connectors	TERM BLOCK HDR 17POS VERT 5.08MM	200
1766408 Phoenix Contact	TERM BLOCK HDR 8POS 90DEG 7.5MM	290
OSTTS07315A On-Shore Technology, Inc.	TERM BLOCK PLUG 7POS 3.81MM	0
2853763 Phoenix Contact	TERM BLOCK HDR 3POS 90DEG 5MM	109

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