Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395151006

0395151006

Woodhead - Molex

TERM BLOCK HDR 6POS VERT 3.81MM

0

0397050012

0397050012

Woodhead - Molex

TERM BLOCK PLUG 12POS STR 7.62MM

0

0395337903

0395337903

Woodhead - Molex

TERM BLOCK PLUG 3POS 5.08MM

0

0395338824

0395338824

Woodhead - Molex

TERM BLOCK PLUG 24POS 5.08MM

0

0395133911

0395133911

Woodhead - Molex

TERM BLOCK PLUG 11POS 3.81MM

0

0395373318

0395373318

Woodhead - Molex

TERM BLOCK PLUG 18POS 5.08MM

0

0395377424

0395377424

Woodhead - Molex

TERM BLOCK PLUG 24POS 5.08MM

0

0395365018

0395365018

Woodhead - Molex

TERM BLOCK HDR 18POS 5.08MM

0

0395126014

0395126014

Woodhead - Molex

TERM BLOCK HDR 14POS 3.81MM

0

0395137306

0395137306

Woodhead - Molex

TERM BLOCK PLUG 6POS 3.81MM

0

0393740904

0393740904

Woodhead - Molex

TERM BLOCK PLUG 4POS 90DEG 7.5MM

0

0395324518

0395324518

Woodhead - Molex

TERM BLOCK HDR 18POS 5.08MM

0

0395000502

0395000502

Woodhead - Molex

TERM BLOCK PLUG 2POS STR 3.5MM

0

0395205207

0395205207

Woodhead - Molex

TERM BLOCK PLUG 7POS STR 5MM

0

0395214022

0395214022

Woodhead - Molex

TERM BLOCK HDR 22POS VERT 5MM

0

0395377504

0395377504

Woodhead - Molex

TERM BLOCK PLUG 4POS 5.08MM

0

0395178913

0395178913

Woodhead - Molex

TERM BLOCK PLUG 13POS 3.81MM

0

0395105714

0395105714

Woodhead - Molex

TERM BLOCK PLUG 14POS STR 3.81MM

0

0395305610

0395305610

Woodhead - Molex

TERM BLOCK PLUG 10POS STR 5.08MM

0

0395333007

0395333007

Woodhead - Molex

TERM BLOCK PLUG 7POS 5.08MM

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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