Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395172020

0395172020

Woodhead - Molex

TERM BLOCK PLUG 20POS 3.81MM

0

0395133419

0395133419

Woodhead - Molex

TERM BLOCK PLUG 19POS 3.81MM

0

0395269007

0395269007

Woodhead - Molex

TERM BLOCK HDR 7POS 90DEG 5MM

0

0395237920

0395237920

Woodhead - Molex

TERM BLOCK PLUG 20POS 270DEG 5MM

0

0395240022

0395240022

Woodhead - Molex

TERM BLOCK PLUG 22POS STR 5MM

0

0397170006

0397170006

Woodhead - Molex

TERM BLOCK PLUG 6POS STR 5.08MM

0

0397310003

0397310003

Woodhead - Molex

TERM BLOCK HDR 3POS VERT 7.62MM

0

0395282008

0395282008

Woodhead - Molex

TERM BLOCK HDR 8POS VERT 5MM

0

0395233304

0395233304

Woodhead - Molex

TERM BLOCK PLUG 4POS 90DEG 5MM

0

0395332414

0395332414

Woodhead - Molex

TERM BLOCK PLUG 14POS 5.08MM

0

0395040617

0395040617

Woodhead - Molex

TERM BLOCK PLUG 17POS STR 3.5MM

0

0395333419

0395333419

Woodhead - Molex

TERM BLOCK PLUG 19POS 5.08MM

0

0395173416

0395173416

Woodhead - Molex

TERM BLOCK PLUG 16POS 3.81MM

0

0395316506

0395316506

Woodhead - Molex

TERM BLOCK HDR 6POS VERT 5.08MM

0

0395133817

0395133817

Woodhead - Molex

TERM BLOCK PLUG 17POS 3.81MM

0

0395373003

0395373003

Woodhead - Molex

TERM BLOCK PLUG 3POS 5.08MM

0

0395000617

0395000617

Woodhead - Molex

TERM BLOCK PLUG 17POS STR 3.5MM

0

0395132307

0395132307

Woodhead - Molex

TERM BLOCK PLUG 7POS 3.81MM

0

0395173517

0395173517

Woodhead - Molex

TERM BLOCK PLUG 17POS 3.81MM

0

0395238305

0395238305

Woodhead - Molex

TERM BLOCK PLUG 5POS 90DEG 5MM

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

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