Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
38.113 Altech Corporation	PCB HEADER 13 P 7.62MM STLZ960/1	0
PH04-3,50-K Altech Corporation	PCB HEADER 4P 350MM HORIZONTAL 1	0
37.453 Altech Corporation	PCB HEADER 3 P 5.08MM STLZ950/03	0
SVR05-5,00 Altech Corporation	PLUG PCB 500MMPS VERT 5P 12A300V	0
PDV02-3,81-H-M Altech Corporation	PCB DUAL ROW HDR 2P 381MM HORIZO	0
37.756 Altech Corporation	PCB HEADER 6 P 5.08MM STLZ990/06	0
SH13-5,08-K Altech Corporation	PCB-PLUG WSCREW FLANGE 508MMPS13	0
PDV23-3,81-H-K Altech Corporation	PCB DUAL ROW HEADER 23P 381MM HO	0
PDV23-3,50-H-K Altech Corporation	PCB DUAL ROW HEADER 23P 350MM HO	0
37.014 Altech Corporation	PCB PLUG 14P 5.08MM HORZ 15A GRN	340
PVP04-5,08 Altech Corporation	VERTHEADER508PSCLOSED END 4P12A3	0
PVP09-10,00 Altech Corporation	PCB HDR VERT 10MMPS 9PCLOSED END	0
SHS08-5,00 Altech Corporation	PCB TERMPLUGGABLE5MMPS 8P10A250V	0
30.475 Altech Corporation	HEADER PCB 5POS 5MM HORZ	0
PVP20-5,00 Altech Corporation	VERTHEADER5MMPSCLOSED END 20P12A	40
36.214 Altech Corporation	PCB PLUG 14P 5.00MM VERT AK1100/	0
PHP24-3,50 Altech Corporation	PCB HEADER 24P 350MM HORIZONTAL	0
SVR15-5,00-K Altech Corporation	PLUG PCB SCREW VERT 5MMPS 15P 12	0
PDV14-3,50-V-M Altech Corporation	PCB DUAL ROW HEADER 14P 350MM VE	0
37.519 Altech Corporation	PCB HEADER 19 P 5.08MM STLZ950/1	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