Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395026508

0395026508

Woodhead - Molex

TERM BLOCK HDR 8POS 90DEG 3.5MM

0

0395238517

0395238517

Woodhead - Molex

TERM BLOCK PLUG 17POS 90DEG 5MM

0

0395005510

0395005510

Woodhead - Molex

TERM BLOCK PLUG 10POS STR 3.5MM

0

0395333510

0395333510

Woodhead - Molex

TERM BLOCK PLUG 10POS 5.08MM

0

0399400416

0399400416

Woodhead - Molex

TERM BLOCK PLUG 16POS 5.08MM

0

0395345619

0395345619

Woodhead - Molex

TERM BLOCK PLUG 19POS STR 5.08MM

0

0395121514

0395121514

Woodhead - Molex

TERM BLOCK HDR 14POS 3.81MM

0

0395372005

0395372005

Woodhead - Molex

TERM BLOCK PLUG 5POS 5.08MM

0

0395338407

0395338407

Woodhead - Molex

TERM BLOCK PLUG 7POS 5.08MM

0

0395116502

0395116502

Woodhead - Molex

TERM BLOCK HDR 2POS VERT 3.81MM

0

0395200213

0395200213

Woodhead - Molex

TERM BLOCK PLUG 13POS STR 5MM

0

0395340016

0395340016

Woodhead - Molex

TERM BLOCK PLUG 16POS STR 5.08MM

0

0395282012

0395282012

Woodhead - Molex

TERM BLOCK HDR 12POS VERT 5MM

0

0397120004

0397120004

Woodhead - Molex

TERM BLOCK PLUG 4POS 7.62MM

0

0395200103

0395200103

Woodhead - Molex

TERM BLOCK PLUG 3POS STR 5MM

0

0395320018

0395320018

Woodhead - Molex

TERM BLOCK HDR 18POS 5.08MM

0

0395005502

0395005502

Woodhead - Molex

TERM BLOCK PLUG 2POS STR 3.5MM

0

0395116513

0395116513

Woodhead - Molex

TERM BLOCK HDR 13POS VERT 3.81MM

0

0395232302

0395232302

Woodhead - Molex

TERM BLOCK PLUG 2POS 270DEG 5MM

0

0395321016

0395321016

Woodhead - Molex

TERM BLOCK HDR 16POS 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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