Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
PDV21-3,50-H-K Altech Corporation	PCB DUAL ROW HEADER 21P 350MM HO	0
SVF09-10,16 Altech Corporation	PLUG PCB 1016MMPS VERT 9P 12A300	0
PH04-10,16 Altech Corporation	PCB HDR HORIZ 1016MMPS OPEN END4	0
PDV19-3,81-H-K Altech Corporation	PCB DUAL ROW HEADER 19P 381MM HO	0
PDV10-3,50-H-P Altech Corporation	PCB DUAL ROW HDR 10P 350MM HORIZ	0
PDSV06-10,16 Altech Corporation	DOUBLE LVL HDR VERT 12P 1016MMPS	0
37.503 Altech Corporation	PCB HEADER 3 P 5.08MM STLZ950/03	0
PH04-3,81 Altech Corporation	PCB HEADER 4P 381MM HORIZONTAL 1	0
PDSV21-5,08 Altech Corporation	DOUBLE LVL HDR VERT 42P 508MMPS1	0
PDV18-3,81-H-P Altech Corporation	PCB DUAL ROW HEADER 18P 381MM HO	0
37.212 Altech Corporation	PCB HDR 12P 5.08MM STLZ950/12G5.	460
PVP04-3,81 Altech Corporation	PCB HEADER 4P 381MM VERTICAL 11A	650
30.494 Altech Corporation	HEADER PCB 24 POS 5MM HORZ	380
PV21-5,08 Altech Corporation	VERTHEADER 508MMPS 21POPENEND12A	0
SVP04-3,81 Altech Corporation	PLUG PCB 4P 381MM VERT 11A 300V	0
PH09-3,81-K Altech Corporation	PCB HEADER 9P 381MM HORIZONTAL 1	0
36.409 Altech Corporation	PCB HDR 9P 3.81MM HORZ	0
PDV02-3,81-V-M Altech Corporation	PCB DUAL ROW HDR 2P 381MM VERTIC	0
37.704 Altech Corporation	PCB PLUG 4 P 5.00MM HORIZONTAL A	350
PH09-3,50 Altech Corporation	PCB HEADER 9P 350MM HORIZONTAL 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