Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
37.652 Altech Corporation	PCB HEADER 2 P 5.08MM STLZ990/02	0
SVP18-3,50-K Altech Corporation	PLUG PCB 18P 350MM VERT 11A 300V	0
PDSV11-10,16 Altech Corporation	DOUBLE LVL HDR VERT 22P 1016MMPS	0
PH07-3,81-K Altech Corporation	PCB HEADER 7P 381MM HORIZONTAL 1	0
37.842 Altech Corporation	PCB HEADER DOUBLE LEVEL 42 P 5.0	0
SVR10-5,00-K Altech Corporation	PLUG PCB SCREW VERT 5MMPS 10P 12	0
PVS06-3,50 Altech Corporation	PCBPIN HEADER TERM 35MM 6P	0
36.310 Altech Corporation	PCB PLUG 10P 3.81MM HORZ AKZ1550	150
PDSH15-5,08 Altech Corporation	DOUBLE LVL HDR HORIZ 30P 508MMPS	0
37.561 Altech Corporation	PCB HEADER 11 P 5.00MM STL950/11	0
30.303 Altech Corporation	TERM PLUG 3 P 5MM GRY 9A 150V	5100
37.352 Altech Corporation	PCB HEADER 2 P 5.00MM STL950/025	0
PVP13-7,50 Altech Corporation	PCB HDR VERT 75MMPS CLOSED END13	0
37.608 Altech Corporation	PCB HEADER 8 P 5.00MM STL950/08G	0
SH15-5,08 Altech Corporation	PCBPLUG 508MMPS 15P12A300VGRN	380
PH02-10,16-K Altech Corporation	PCB HORIZHDRSCREW FLANGE 1016PS	0
PDV13-3,81-V-M Altech Corporation	PCB DUAL ROW HEADER 13P 381MM VE	0
PV15-3,81-K Altech Corporation	PCB HEADER 15P 381MM VERTICAL 11	0
SVF24-3,50-K Altech Corporation	PLUG PCB 24P 350MM VERT 11A 300V	0
PDV16-3,50-V-K Altech Corporation	PCB DUAL ROW HEADER 16P 350MM VE	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