Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
SVP22-3,50 Altech Corporation	PLUG PCB 22P 350MM VERT 11A 300V	0
SH08-10,16 Altech Corporation	PCBPLUG 1016MMPS 8P 12A 300V GRN	0
PDV05-3,50-H-K Altech Corporation	PCB DUAL ROW HDR 5P 350MM HORIZO	0
SVP09-3,81 Altech Corporation	PLUG PCB 9P 381MM VERT 11A 300V	0
PDSH24-5,08 Altech Corporation	DOUBLE LVL HDR HORIZ 48P 508MMPS	20
SVF07-3,50-K Altech Corporation	PLUG PCB 7P 350MM VERT 11A 300V	0
SVF03-3,50-K Altech Corporation	PLUG PCB 3P 350MM VERT 11A 300V	0
37.121 Altech Corporation	PCB HDR 21P 5.08MM HORZ	0
SVR03-5,00-K Altech Corporation	PLUG PCB SCREW VERT 5MMPS 3P 12A	0
SVP06-3,50-K Altech Corporation	PLUG PCB 6P 350MM VERT 11A 300V	0
37.804 Altech Corporation	PCB HEADER DOUBLE LEVEL 4 P 5.08	60
37.894 Altech Corporation	PCB HEADER DOUBLE LEVEL 44 P 5.0	0
SH03-3,50-K Altech Corporation	PCBPLUG 3P 350MM HORIZONTAL 11A	0
SVR08-5,00-K Altech Corporation	PLUG PCB SCREW VERT 5MMPS 8P 12A	0
37.616 Altech Corporation	PCB HEADER 16 P 5.00MM STL950/16	0
PVP24-5,00 Altech Corporation	VERTHEADER5MMPSCLOSED END 24P12A	0
PDV14-3,50-V-K Altech Corporation	PCB DUAL ROW HEADER 14P 350MM VE	0
38.204 Altech Corporation	PCB HEADER 4 P 7.62MM STLZ960/04	0
PH22-5,08 Altech Corporation	PCB HORIZ HEADER508MMPS 22POPENE	0
PHP23-5,08 Altech Corporation	PCB HEADER508MMPSCLOSED END 23PH	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