Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
SVR06-5,00-K Altech Corporation	PLUG PCB SCREW VERT 5MMPS 6P 12A	0
PDSV23-5,08 Altech Corporation	DOUBLE LVL HDR VERT 46P 508MMPS1	100
PVP22-5,08 Altech Corporation	VERTHEADER508PSCLOSED END 22P12A	0
30.320 Altech Corporation	TERM PLUG 20 P 5MM GRY 9A 150V	0
SVF22-3,50 Altech Corporation	PLUG PCB 22P 350MM VERT 11A 300V	0
SHS22-5,00 Altech Corporation	PCB TERMPLUGGABLE5MMPS 22P10A250	0
37.216 Altech Corporation	PCB HDR 16P 5.08MM STLZ950/16G5.	285
SH04-10,00 Altech Corporation	PCBPLUG 10MMPS 4P 12A 300V GRN	0
PDV06-3,50-H-P Altech Corporation	PCB DUAL ROW HDR 6P 350MM HORIZO	0
PV03-10,16 Altech Corporation	PCB HDR VERT 1016MMPS OPEN END 3	0
SVP20-3,50-K Altech Corporation	PLUG PCB 20P 350MM VERT 11A 300V	0
PV03-5,00-LS Altech Corporation	PCB HEADER 3P LEFT SIDE 500MM 12	0
30.478 Altech Corporation	HEADER PCB 8POS 5MM HORZ	0
SH07-3,81 Altech Corporation	PCBPLUG 7P 381MM HORIZONTAL 11A	200
PV08-3,50-K Altech Corporation	PCB HEADER 8P 350MM VERTICAL 11A	0
37.767 Altech Corporation	PCB HEADER 17 P 5.08MM STLZ990/1	0
37.574 Altech Corporation	PCB HEADER 24 P 5.00MM STL950/24	0
37.611 Altech Corporation	PCB HEADER 11 P 5.00MM STL950/11	40
37.764 Altech Corporation	PCB HEADER 14 P 5.08MM STLZ990/1	0
37.619 Altech Corporation	PCB HEADER 19 P 5.00MM STL950/19	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