Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395132810

0395132810

Woodhead - Molex

TERM BLOCK PLUG 10POS 3.81MM

0

0395273003

0395273003

Woodhead - Molex

TERM BLOCK PLUG 3POS 90DEG 5MM

0

0395100704

0395100704

Woodhead - Molex

TERM BLOCK PLUG 4POS STR 3.81MM

0

0395045619

0395045619

Woodhead - Molex

TERM BLOCK PLUG 19POS STR 3.5MM

0

0395137414

0395137414

Woodhead - Molex

TERM BLOCK PLUG 14POS 3.81MM

0

0395111012

0395111012

Woodhead - Molex

TERM BLOCK HDR 12POS VERT 3.81MM

0

0395173515

0395173515

Woodhead - Molex

TERM BLOCK PLUG 15POS 3.81MM

0

0395378824

0395378824

Woodhead - Molex

TERM BLOCK PLUG 24POS 5.08MM

0

0395100108

0395100108

Woodhead - Molex

TERM BLOCK PLUG 8POS STR 3.81MM

0

0395137506

0395137506

Woodhead - Molex

TERM BLOCK PLUG 6POS 3.81MM

0

0395300111

0395300111

Woodhead - Molex

TERM BLOCK PLUG 11POS STR 5.08MM

0

0395345607

0395345607

Woodhead - Molex

TERM BLOCK PLUG 7POS STR 5.08MM

0

0395365024

0395365024

Woodhead - Molex

TERM BLOCK HDR 24POS 5.08MM

0

0395232915

0395232915

Woodhead - Molex

TERM BLOCK PLUG 15POS 270DEG 5MM

0

0397560007

0397560007

Woodhead - Molex

TERM BLOCK HDR 7POS VERT 5MM

0

0395237921

0395237921

Woodhead - Molex

TERM BLOCK PLUG 21POS 270DEG 5MM

0

0395372011

0395372011

Woodhead - Molex

TERM BLOCK PLUG 11POS 5.08MM

0

0395345116

0395345116

Woodhead - Molex

TERM BLOCK PLUG 16POS STR 5.08MM

0

0395340517

0395340517

Woodhead - Molex

TERM BLOCK PLUG 17POS STR 5.08MM

0

0395378321

0395378321

Woodhead - Molex

TERM BLOCK PLUG 21POS 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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