Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395000207

0395000207

Woodhead - Molex

TERM BLOCK PLUG 7POS STR 3.5MM

0

0395200712

0395200712

Woodhead - Molex

TERM BLOCK PLUG 12POS STR 5MM

0

0395132316

0395132316

Woodhead - Molex

TERM BLOCK PLUG 16POS 3.81MM

0

0395237814

0395237814

Woodhead - Molex

TERM BLOCK PLUG 14POS 270DEG 5MM

0

0395381022

0395381022

Woodhead - Molex

TERM BLOCK HDR 22POS 5.08MM

0

0395216016

0395216016

Woodhead - Molex

TERM BLOCK HDR 16POS VERT 5MM

0

0395369509

0395369509

Woodhead - Molex

TERM BLOCK HDR 9POS 90DEG 5.08MM

0

0395133018

0395133018

Woodhead - Molex

TERM BLOCK PLUG 18POS 3.81MM

0

0395345724

0395345724

Woodhead - Molex

TERM BLOCK PLUG 24POS STR 5.08MM

0

0395377302

0395377302

Woodhead - Molex

TERM BLOCK PLUG 2POS 5.08MM

0

0395005619

0395005619

Woodhead - Molex

TERM BLOCK PLUG 19POS STR 3.5MM

0

0395133311

0395133311

Woodhead - Molex

TERM BLOCK PLUG 11POS 3.81MM

0

0395178302

0395178302

Woodhead - Molex

TERM BLOCK PLUG 2POS 3.81MM

0

0395178411

0395178411

Woodhead - Molex

TERM BLOCK PLUG 11POS 3.81MM

0

0395178413

0395178413

Woodhead - Molex

TERM BLOCK PLUG 13POS 3.81MM

0

0395337303

0395337303

Woodhead - Molex

TERM BLOCK PLUG 3POS 5.08MM

0

0395360015

0395360015

Woodhead - Molex

TERM BLOCK HDR 15POS 5.08MM

0

0397600010

0397600010

Woodhead - Molex

TERM BLOCK PLUG 10POS STR 5.08MM

0

0395305515

0395305515

Woodhead - Molex

TERM BLOCK PLUG 15POS STR 5.08MM

0

0395166015

0395166015

Woodhead - Molex

TERM BLOCK HDR 15POS 3.81MM

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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