Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395219002

0395219002

Woodhead - Molex

TERM BLOCK HDR 2POS VERT 5MM

0

0395178920

0395178920

Woodhead - Molex

TERM BLOCK PLUG 20POS 3.81MM

0

0395137014

0395137014

Woodhead - Molex

TERM BLOCK PLUG 14POS 3.81MM

0

0395333420

0395333420

Woodhead - Molex

TERM BLOCK PLUG 20POS 5.08MM

0

0395100017

0395100017

Woodhead - Molex

TERM BLOCK PLUG 17POS STR 3.81MM

0

0395282018

0395282018

Woodhead - Molex

TERM BLOCK HDR 18POS VERT 5MM

0

0395345215

0395345215

Woodhead - Molex

TERM BLOCK PLUG 15POS STR 5.08MM

0

0395237514

0395237514

Woodhead - Molex

TERM BLOCK PLUG 14POS 270DEG 5MM

0

0395325504

0395325504

Woodhead - Molex

TERM BLOCK HDR 4POS 90DEG 5.08MM

0

0395016017

0395016017

Woodhead - Molex

TERM BLOCK HDR 17POS VERT 3.5MM

0

0395037013

0395037013

Woodhead - Molex

TERM BLOCK PLUG 13POS 3.5MM

0

0395145506

0395145506

Woodhead - Molex

TERM BLOCK PLUG 6POS STR 3.81MM

0

0395137020

0395137020

Woodhead - Molex

TERM BLOCK PLUG 20POS 3.81MM

0

0395132920

0395132920

Woodhead - Molex

TERM BLOCK PLUG 20POS 3.81MM

0

0395166014

0395166014

Woodhead - Molex

TERM BLOCK HDR 14POS 3.81MM

0

0395305102

0395305102

Woodhead - Molex

TERM BLOCK PLUG 2POS STR 5.08MM

0

0395137510

0395137510

Woodhead - Molex

TERM BLOCK PLUG 10POS 3.81MM

0

0395314517

0395314517

Woodhead - Molex

TERM BLOCK HDR 17POS VERT 5.08MM

0

0395332924

0395332924

Woodhead - Molex

TERM BLOCK PLUG 24POS 5.08MM

0

0395132515

0395132515

Woodhead - Molex

TERM BLOCK PLUG 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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