Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395116019

0395116019

Woodhead - Molex

TERM BLOCK HDR 19POS VERT 3.81MM

0

0395337406

0395337406

Woodhead - Molex

TERM BLOCK PLUG 6POS 5.08MM

0

0397530008

0397530008

Woodhead - Molex

TERM BLOCK PLUG 8POS 90DEG 5MM

0

0395272024

0395272024

Woodhead - Molex

TERM BLOCK PLUG 24POS 270DEG 5MM

0

0395100703

0395100703

Woodhead - Molex

TERM BLOCK PLUG 3POS STR 3.81MM

0

0395316508

0395316508

Woodhead - Molex

TERM BLOCK HDR 8POS VERT 5.08MM

0

0397250007

0397250007

Woodhead - Molex

TERM BLOCK HDR 7POS 90DEG 7.62MM

0

0395338019

0395338019

Woodhead - Molex

TERM BLOCK PLUG 19POS 5.08MM

0

0395232809

0395232809

Woodhead - Molex

TERM BLOCK PLUG 9POS 270DEG 5MM

0

0397310008

0397310008

Woodhead - Molex

TERM BLOCK HDR 8POS VERT 7.62MM

0

0395105220

0395105220

Woodhead - Molex

TERM BLOCK PLUG 20POS STR 3.81MM

0

0395229020

0395229020

Woodhead - Molex

TERM BLOCK HDR 20POS 90DEG 5MM

0

0395238004

0395238004

Woodhead - Molex

TERM BLOCK PLUG 4POS 90DEG 5MM

648

0395332421

0395332421

Woodhead - Molex

TERM BLOCK PLUG 21POS 5.08MM

0

0395056504

0395056504

Woodhead - Molex

TERM BLOCK HDR 4POS VERT 3.5MM

0

0395133914

0395133914

Woodhead - Molex

TERM BLOCK PLUG 14POS 3.81MM

0

0395005211

0395005211

Woodhead - Molex

TERM BLOCK PLUG 11POS STR 3.5MM

0

0395133808

0395133808

Woodhead - Molex

TERM BLOCK PLUG 8POS 3.81MM

0

0395133917

0395133917

Woodhead - Molex

TERM BLOCK PLUG 17POS 3.81MM

0

0395337304

0395337304

Woodhead - Molex

TERM BLOCK PLUG 4POS 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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