Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
PH17-3,81 Altech Corporation	PCB HEADER 17P 381MM HORIZONTAL	0
37.215 Altech Corporation	PCB HDR 15P 5.08MM STLZ950/15G5.	80
37.521 Altech Corporation	PCB HEADER 21 P 5.08MM STLZ950/2	0
PV08-7,50 Altech Corporation	PCB HDR VERT 75MMPS OPEN END 8PS	0
PHP04-3,50 Altech Corporation	PCB HEADER 4P 350MM HORIZONTAL 1	100
37.557 Altech Corporation	PCB HEADER 7 P 5.00MM STL950/07G	30
PDV02-5,08 Altech Corporation	PCB DUAL ROW VERT HDR 508MM 4P C	0
PDSH07-10,16 Altech Corporation	DOUBLE LV1 HDR HORIZ 14P1016MMPS	0
SVF07-3,81 Altech Corporation	PLUG PCB 7P 381MM VERT 11A 300V	0
PHP20-5,00 Altech Corporation	PCB HEADER5MMPSCLOSED END 20P HO	0
SVP07-5,08 Altech Corporation	PLUG PCB 508MMPS VERT (50) 7P 12	99
37.520 Altech Corporation	PCB HEADER 20 P 5.08MM STLZ950/2	0
PVP18-3,81 Altech Corporation	PCB HEADER 18P 381MM VERTICAL 11	0
PH11-10,16 Altech Corporation	PCB HDR HORIZ1016MMPS OPEN END11	0
SVF02-3,81-K Altech Corporation	PLUG PCB 2P 381MM VERT 11A 300V	0
37.211 Altech Corporation	PCB HDR 11P 5.08MM VERT	0
SH23-3,81 Altech Corporation	PCBPLUG 23P 381MM HORIZONTAL 11A	0
36.414 Altech Corporation	PCB HDR 14P 3.81MM STLZ1550/14G3	0
PV11-5,00 Altech Corporation	PCB HDR VERT 5MMPS 11POPEN END12	0
PHP10-7,50 Altech Corporation	PCB HDR HORIZ 75MMPS CLOSED END	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