Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
PH15-5,08 Altech Corporation	PCB HORIZ HEADER508MMPS 15POPENE	0
PV02-3,81-K Altech Corporation	PCB HEADER 2P 381MM VERTICAL 11A	0
PDV08-3,50-H-M Altech Corporation	PCB DUAL ROW HDR 8P 350MM HORIZO	0
PHP02-3,81 Altech Corporation	PCB HEADER 2P 381MM HORIZONTAL 1	100
SHS24-5,00 Altech Corporation	PCB TERMPLUGGABLE5MMPS 24P10A250	0
PV08-5,08 Altech Corporation	PCB HDR VERT 508MMPS 8POPEN END1	0
SHS21-5,00 Altech Corporation	PCB TERMPLUGGABLE5MMPS 21P10A250	0
PVP09-5,00-L Altech Corporation	VERT HEADER 5MM 144MMPINS 9P 12A	0
PH05-3,50-K Altech Corporation	PCB HEADER 5P 350MM HORIZONTAL 1	0
37.874 Altech Corporation	PCB HEADER DOUBLE LEVEL 24 P 5.0	140
SVF07-3,50 Altech Corporation	PLUG PCB 7P 350MM VERT 11A 300V	0
PH11-3,50-K Altech Corporation	PCB HEADER 11P 350MM HORIZONTAL	0
PV09-7,50 Altech Corporation	PCB HDR VERT 75MMPS OPEN END 9PS	0
SH20-3,81K Altech Corporation	PCBPLUG W SCREW FLANGE 381MMPS 2	0
SVF22-3,50-K Altech Corporation	PLUG PCB 22P 350MM VERT 11A 300V	0
37.888 Altech Corporation	PCB HEADER DOUBLE LEVEL 38 P 5.0	0
SH03-5,08-K Altech Corporation	PCB-PLUG WSCREW FLANGE 508MMPS 3	0
PHP23-5,00 Altech Corporation	PCB HEADER5MMPSCLOSED END 23P HO	0
PVP10-5,00 Altech Corporation	VERTHEADER5MMPSCLOSED END 10P12A	3500
PH18-5,08 Altech Corporation	PCB HORIZ HEADER508MMPS 18POPENE	80

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