Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
PVP16-3,81 Altech Corporation	PCB HEADER 16P 381MM VERTICAL 11	0
SH15-5,08-K Altech Corporation	PCB-PLUG WSCREW FLANGE 508MMPS15	100
PVP04-3,50 Altech Corporation	PCB HEADER 4P 350MM VERTICAL 11A	200
37.203 Altech Corporation	PCB HDR 3P 5.08MM VERT	1100
PH14-7,50 Altech Corporation	PCB HDR HORIZ 75MMPS OPEN END14P	0
PHP14-3,81 Altech Corporation	PCB HEADER 14P 381MM HORIZONTAL	200
PV19-5,08 Altech Corporation	VERTHEADER 508MMPS 19POPENEND12A	0
36.220 Altech Corporation	PCB PLUG 20P 5.00MM VERT AK1100/	0
PV11-3,50 Altech Corporation	PCB HEADER 11P 350MM VERTICAL 11	0
SH05-10,00 Altech Corporation	PCBPLUG 10MMPS 5P 12A 300V GRN	0
PV21-3,81-K Altech Corporation	PCB HEADER 21P 381MM VERTICAL 11	0
30.373 Altech Corporation	HEADER PCB 23POS 5MM VERT	0
MVI-12 Altech Corporation	PCB TERM12PPLUG-INCARD EDGE 635M	0
37.511 Altech Corporation	PCB HEADER 11 P 5.08MM STLZ950/1	0
37.878 Altech Corporation	PCB HEADER DOUBLE LEVEL 28 P 5.0	0
PVP22-5,00 Altech Corporation	VERTHEADER5MMPSCLOSED END 22P12A	0
PHP05-3,81 Altech Corporation	PCB HEADER 5P 381MM HORIZONTAL 1	100
PVP07-5,00 Altech Corporation	VERTHEADER5MMPSCLOSED END 7P12A3	400
PH09-3,50-K Altech Corporation	PCB HEADER 9P 350MM HORIZONTAL 1	0
SVF05-5,08 Altech Corporation	PLUG PCB 508MMPS VERT 5P 12A300V	550

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