Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
32.513 Altech Corporation	PCB PIN HEADER 13P 5MM BLK VERT	0
1881626 Phoenix Contact	TERM BLOCK HDR 9POS VERT 2.5MM	1
1912223 Phoenix Contact	TERM BLOCK PLUG 6POS STR 5.08MM	7
TS06515B0000G Anytek (Amphenol Anytek)	TERM BLOCK PLUG 6POS 5.08MM	2435
0395325007 Woodhead - Molex	TERM BLOCK HDR 7POS 90DEG 5.08MM	1181
1633680000 Weidmuller	TERM BLOCK HDR 24POS 90DEG 3.5MM	39560
1277480000 Weidmuller	TERM BLOCK PLUG 8POS STR 3.5MM	0
5433697 Phoenix Contact	TERM BLOCK HDR 5POS 90DEG 5.08MM	5
1-1986722-9 TE Connectivity AMP Connectors	TERM BLOCK PLUG 19POS STR 3.81MM	0
OSTOQ065451 On-Shore Technology, Inc.	TERM BLOCK HDR 6POS 90DEG 5.08MM	770
0395000009 Woodhead - Molex	TERM BLOCK PLUG 9POS STR 3.5MM	0
691311500018 Würth Elektronik Midcom	TERM BLOCK HDR 18POS VERT 5.08MM	89
1840133 Phoenix Contact	TERM BLOCK PLUG 8POS STR 7.62MM	50
1762703 Phoenix Contact	TERM BLOCK HDR 24POS 5.08MM	0
31049104 RIA Connect / METZ CONNECT	SCREW TYPE TERMINAL BLOCK, PLUG,	278
691701530012B Würth Elektronik Midcom	5.08 MM TERMINAL BLOCK HEADER, H	250
1943603 Phoenix Contact	TERM BLOCK HDR 9POS VERT 5.08MM	0
ELFH06250 Socapex (Amphenol Pcd)	TERM BLOCK HDR 6POS VERT 5.08MM	160
1970220000 Weidmuller	TERM BLOCK PLUG 15POS STR 3.81MM	90
1982740000 Weidmuller	TERM BLOCK PLUG 6POS 5.08MM	68

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