Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395145507

0395145507

Woodhead - Molex

TERM BLOCK PLUG 7POS STR 3.81MM

0

0395219024

0395219024

Woodhead - Molex

TERM BLOCK HDR 24POS VERT 5MM

0

0395369006

0395369006

Woodhead - Molex

TERM BLOCK HDR 6POS 90DEG 5.08MM

0

0395133804

0395133804

Woodhead - Molex

TERM BLOCK PLUG 4POS 3.81MM

0

0395072904

0395072904

Woodhead - Molex

TERM BLOCK PLUG 4POS 3.5MM

0

0395172509

0395172509

Woodhead - Molex

TERM BLOCK PLUG 9POS 3.81MM

0

0395337320

0395337320

Woodhead - Molex

TERM BLOCK PLUG 20POS 5.08MM

0

0395200611

0395200611

Woodhead - Molex

TERM BLOCK PLUG 11POS STR 5MM

0

0395005704

0395005704

Woodhead - Molex

TERM BLOCK PLUG 4POS STR 3.5MM

0

0395178309

0395178309

Woodhead - Molex

TERM BLOCK PLUG 9POS 3.81MM

0

0395325024

0395325024

Woodhead - Molex

TERM BLOCK HDR 24POS 5.08MM

0

0395377414

0395377414

Woodhead - Molex

TERM BLOCK PLUG 14POS 5.08MM

0

0395305520

0395305520

Woodhead - Molex

TERM BLOCK PLUG 20POS STR 5.08MM

0

0395224006

0395224006

Woodhead - Molex

TERM BLOCK HDR 6POS 90DEG 5MM

0

0397100002

0397100002

Woodhead - Molex

TERM BLOCK PLUG 2POS STR 5MM

0

0399410724

0399410724

Woodhead - Molex

TERM BLOCK PLUG 24POS 5.08MM

0

0395269013

0395269013

Woodhead - Molex

TERM BLOCK HDR 13POS 90DEG 5MM

0

0395311020

0395311020

Woodhead - Molex

TERM BLOCK HDR 20POS VERT 5.08MM

0

0395333810

0395333810

Woodhead - Molex

TERM BLOCK PLUG 10POS 5.08MM

0

0395378417

0395378417

Woodhead - Molex

TERM BLOCK PLUG 17POS 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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