Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395051509

0395051509

Woodhead - Molex

TERM BLOCK HDR 9POS VERT 3.5MM

0

0395100207

0395100207

Woodhead - Molex

TERM BLOCK PLUG 7POS STR 3.81MM

0

0395138411

0395138411

Woodhead - Molex

TERM BLOCK PLUG 11POS 3.81MM

0

0395377412

0395377412

Woodhead - Molex

TERM BLOCK PLUG 12POS 5.08MM

0

0395133305

0395133305

Woodhead - Molex

TERM BLOCK PLUG 5POS 3.81MM

0

0395100716

0395100716

Woodhead - Molex

TERM BLOCK PLUG 16POS STR 3.81MM

0

0395315022

0395315022

Woodhead - Molex

TERM BLOCK HDR 22POS VERT 5.08MM

0

0395315518

0395315518

Woodhead - Molex

TERM BLOCK HDR 18POS VERT 5.08MM

0

0397150006

0397150006

Woodhead - Molex

TERM BLOCK PLUG 6POS STR 5.08MM

0

0395325508

0395325508

Woodhead - Molex

TERM BLOCK HDR 8POS 90DEG 5.08MM

0

0395000215

0395000215

Woodhead - Molex

TERM BLOCK PLUG 15POS STR 3.5MM

0

0397570012

0397570012

Woodhead - Molex

TERM BLOCK HDR 12POS VERT 5MM

0

0395345711

0395345711

Woodhead - Molex

TERM BLOCK PLUG 11POS STR 5.08MM

0

0395045714

0395045714

Woodhead - Molex

TERM BLOCK PLUG 14POS STR 3.5MM

0

0397520008

0397520008

Woodhead - Molex

TERM BLOCK HDR 8POS VERT 3.5MM

0

0397250004

0397250004

Woodhead - Molex

TERM BLOCK HDR 4POS 90DEG 7.62MM

0

0395111507

0395111507

Woodhead - Molex

TERM BLOCK HDR 7POS VERT 3.81MM

0

0397370004

0397370004

Woodhead - Molex

TERM BLOCK HDR 4POS VERT 5.08MM

0

0395005604

0395005604

Woodhead - Molex

TERM BLOCK PLUG 4POS STR 3.5MM

0

0395373510

0395373510

Woodhead - Molex

TERM BLOCK PLUG 10POS 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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