Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
PH09-10,16-K Altech Corporation	PCB HORIZHDRSCREW FLANGE 1016PS	0
SH09-5,00 Altech Corporation	PCBPLUG 5MMPS 9P12A300VGRN	500
SVP15-3,81-K Altech Corporation	PLUG PCB 15P 381MM VERT 11A 300V	0
SVP12-3,81 Altech Corporation	PLUG PCB 12P 381MM VERT 11A 300V	0
SVF04-10,16 Altech Corporation	PLUG PCB 1016MMPS VERT 4P 12A300	0
PHP20-3,81 Altech Corporation	PCB HEADER 20P 381MM HORIZONTAL	0
PH03-3,50-K Altech Corporation	PCB HEADER 3P 350MM HORIZONTAL 1	0
SH06-3,50-K Altech Corporation	PCBPLUG 6P 350MM HORIZONTAL 11A	0
PH02-10,16 Altech Corporation	PCB HDR HORIZ 1016MMPS OPEN END2	0
SVF03-3,81 Altech Corporation	PLUG PCB 3P 381MM VERT 11A 300V	0
SVF11-3,50-K Altech Corporation	PLUG PCB 11P 350MM VERT 11A 300V	0
PDV14-3,81-V-M Altech Corporation	PCB DUAL ROW HEADER 14P 381MM VE	0
PH16-5,00 Altech Corporation	PCB HORIZ HEADER 5MMPS 16POPEN E	0
PV15-7,50 Altech Corporation	PCB HDR VERT 75MMPS OPEN END15PS	0
38.004 Altech Corporation	PCB PLUG 4 P 7.62MM HORIZONTAL A	200
SH15-5,00 Altech Corporation	PCBPLUG 5MMPS 15P12A300VGRN	260
PH12-7,50 Altech Corporation	PCB HDR HORIZ 75MMPS OPEN END12P	0
PDV02-3,50-H-M Altech Corporation	PCB DUAL ROW HDR 2P 350MM HORIZO	0
PH04-5,08-K Altech Corporation	PCB HORIZHEADERSCREW FLANGE 508P	50
37.524 Altech Corporation	PCB HEADER 24 P 5.08MM STLZ950/2	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