Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
PDV07-3,50-H-M Altech Corporation	PCB DUAL ROW HDR 7P 350MM HORIZO	0
PVP06-7,50 Altech Corporation	PCB HDR VERT 75MMPS CLOSED END6P	0
PH19-3,81-K Altech Corporation	PCB HEADER 19P 381MM HORIZONTAL	0
37.505 Altech Corporation	PCB HEADER 5 P 5.08MM STLZ950/05	0
PH07-5,00 Altech Corporation	PCB HORIZ HEADER5MMPS 7POPEN END	0
PV06-10,16 Altech Corporation	PCB HDR VERT 1016MMPS OPEN END 5	0
SH09-3,50-K Altech Corporation	PCBPLUG 9P 350MM HORIZONTAL 11A	0
PDV05-3,50-V-K Altech Corporation	PCB DUAL ROW HDR 5P 350MM VERTIC	0
PH21-5,08 Altech Corporation	PCB HORIZ HEADER508MMPS 21POPENE	0
PV13-7,50 Altech Corporation	PCB HDR VERT 75MMPS OPEN END13PS	0
PVP23-5,08 Altech Corporation	VERTHEADER508PSCLOSED END 23P12A	80
PV13-3,81 Altech Corporation	PCB HEADER 13P 381MM VERTICAL 11	0
PDV07-3,50-H-P Altech Corporation	PCB DUAL ROW HDR 7P 350MM HORIZO	0
PHP12-10,16 Altech Corporation	PCB HDR HORIZ 1016MMPS CLOSED EN	0
37.854 Altech Corporation	PCB HEADER DOUBLE LEVEL 4 P 5.08	240
SHS18-5,00 Altech Corporation	PCB TERMPLUGGABLE5MMPS 18P10A250	0
PV04-3,81-K Altech Corporation	PCB HEADER 4P 381MM VERTICAL 11A	0
PVP16-3,50 Altech Corporation	PCB HEADER 16P 350MM VERTICAL 11	0
37.866 Altech Corporation	PCB HEADER DOUBLE LEVEL 16 P 5.0	0
PHP09-10,00 Altech Corporation	PCB HDR HORIZ 10MMPS 9PCLOSED EN	0

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