Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395178509

0395178509

Woodhead - Molex

TERM BLOCK PLUG 9POS 3.81MM

0

0397060010

0397060010

Woodhead - Molex

TERM BLOCK PLUG 10POS 7.62MM

0

0395337020

0395337020

Woodhead - Molex

TERM BLOCK PLUG 20POS 5.08MM

0

0395332819

0395332819

Woodhead - Molex

TERM BLOCK PLUG 19POS 5.08MM

0

0395177005

0395177005

Woodhead - Molex

TERM BLOCK PLUG 5POS 3.81MM

1440

0397610009

0397610009

Woodhead - Molex

TERM BLOCK HDR 9POS VERT 5MM

0

0395156016

0395156016

Woodhead - Molex

TERM BLOCK HDR 16POS VERT 3.81MM

0

0397200006

0397200006

Woodhead - Molex

TERM BLOCK HDR 12POS 3.81MM

0

0395345704

0395345704

Woodhead - Molex

TERM BLOCK PLUG 4POS STR 5.08MM

0

0395177806

0395177806

Woodhead - Molex

TERM BLOCK PLUG 6POS 3.81MM

0

0395345221

0395345221

Woodhead - Molex

TERM BLOCK PLUG 21POS STR 5.08MM

0

0395133810

0395133810

Woodhead - Molex

TERM BLOCK PLUG 10POS 3.81MM

0

0395121512

0395121512

Woodhead - Molex

TERM BLOCK HDR 12POS 3.81MM

0

0395066013

0395066013

Woodhead - Molex

TERM BLOCK HDR 13POS 90DEG 3.5MM

0

0395283016

0395283016

Woodhead - Molex

TERM BLOCK HDR 16POS VERT 5MM

0

0395137013

0395137013

Woodhead - Molex

TERM BLOCK PLUG 13POS 3.81MM

0

0395200719

0395200719

Woodhead - Molex

TERM BLOCK PLUG 19POS STR 5MM

0

0394250008

0394250008

Woodhead - Molex

TERM BLOCK HDR 8POS 90DEG 12MM

0

0395338411

0395338411

Woodhead - Molex

TERM BLOCK PLUG 11POS 5.08MM

0

0395178415

0395178415

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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