Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395378006

0395378006

Woodhead - Molex

TERM BLOCK PLUG 6POS 5.08MM

360

0397560002

0397560002

Woodhead - Molex

TERM BLOCK HDR 2POS VERT 5MM

0

0395373409

0395373409

Woodhead - Molex

TERM BLOCK PLUG 9POS 5.08MM

0

0395138910

0395138910

Woodhead - Molex

TERM BLOCK PLUG 10POS 3.81MM

0

0395205621

0395205621

Woodhead - Molex

TERM BLOCK PLUG 21POS STR 5MM

0

0395240016

0395240016

Woodhead - Molex

TERM BLOCK PLUG 16POS STR 5MM

0

0397210012

0397210012

Woodhead - Molex

TERM BLOCK HDR 24POS VERT 3.81MM

0

0395372419

0395372419

Woodhead - Molex

TERM BLOCK PLUG 19POS 5.08MM

0

0395132817

0395132817

Woodhead - Molex

TERM BLOCK PLUG 17POS 3.81MM

0

0395378919

0395378919

Woodhead - Molex

TERM BLOCK PLUG 19POS 5.08MM

0

0395132308

0395132308

Woodhead - Molex

TERM BLOCK PLUG 8POS 3.81MM

0

0395237408

0395237408

Woodhead - Molex

TERM BLOCK PLUG 8POS 270DEG 5MM

0

0395378016

0395378016

Woodhead - Molex

TERM BLOCK PLUG 16POS 5.08MM

0

0395200202

0395200202

Woodhead - Molex

TERM BLOCK PLUG 2POS STR 5MM

0

0395259010

0395259010

Woodhead - Molex

TERM BLOCK HDR 10POS VERT 5MM

0

0395032009

0395032009

Woodhead - Molex

TERM BLOCK PLUG 9POS 3.5MM

0

0395233017

0395233017

Woodhead - Molex

TERM BLOCK PLUG 17POS 90DEG 5MM

0

0397120008

0397120008

Woodhead - Molex

TERM BLOCK PLUG 8POS 7.62MM

0

0395345020

0395345020

Woodhead - Molex

TERM BLOCK PLUG 20POS STR 5.08MM

0

0397510012

0397510012

Woodhead - Molex

TERM BLOCK HDR 12POS VERT 3.5MM

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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