Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
PDV09-3,50-V-K Altech Corporation	PCB DUAL ROW HDR 9P 350MM VERTIC	0
SVP19-3,50-K Altech Corporation	PLUG PCB 19P 350MM VERT 11A 300V	0
PDV23-3,50-V-K Altech Corporation	PCB DUAL ROW HEADER 23P 350MM VE	0
SVP23-3,81-K Altech Corporation	PLUG PCB 23P 381MM VERT 11A 300V	0
37.223 Altech Corporation	PCB HDR 23P 5.08MM STLZ950/23G5.	0
SH07-7,50 Altech Corporation	PCBPLUG 75MMPS 7PS 12A 300V GRN	50
SVP11-3,50-K Altech Corporation	PLUG PCB 11P 350MM VERT 11A 300V	0
PHP07-10,00 Altech Corporation	PCB HDR HORIZ 10MMPS 7PCLOSED EN	0
36.315 Altech Corporation	PCB PLUG 15P 3.81MM HORZ AKZ1550	300
37.766 Altech Corporation	PCB HEADER 16 P 5.08MM STLZ990/1	0
PIP04-5,08 Altech Corporation	PCB HDR 45 DEG 508PITCH CLOSED E	0
SVP16-3,81-K Altech Corporation	PLUG PCB 16P 381MM VERT 11A 300V	0
PVP21-3,50 Altech Corporation	PCB HEADER 21P 350MM VERTICAL 11	0
SVP17-3,81-K Altech Corporation	PLUG PCB 17P 381MM VERT 11A 300V	0
PDV15-3,81-H-M Altech Corporation	PCB DUAL ROW HEADER 15P 381MM HO	0
PDV24-3,81-V-M Altech Corporation	PCB DUAL ROW HEADER 24P 381MM VE	0
PHP03-10,00 Altech Corporation	PCB HDR HORIZ 10MMPS 3PCLOSED EN	0
PDV17-3,81-H-P Altech Corporation	PCB DUAL ROW HEADER 17P 381MM HO	0
SVP09-10,16 Altech Corporation	PLUG PCB 1016MMPS VERT 9P 12A300	0
PV18-3,50 Altech Corporation	PCB HEADER 18P 350MM VERTICAL 11	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