Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
0395011517

0395011517

Woodhead - Molex

TERM BLOCK HDR 17POS VERT 3.5MM

0

0395237810

0395237810

Woodhead - Molex

TERM BLOCK PLUG 10POS 270DEG 5MM

0

0395237816

0395237816

Woodhead - Molex

TERM BLOCK PLUG 16POS 270DEG 5MM

0

0395355518

0395355518

Woodhead - Molex

TERM BLOCK HDR 18POS VERT 5.08MM

0

0395140518

0395140518

Woodhead - Molex

TERM BLOCK PLUG 18POS STR 3.81MM

0

0395286004

0395286004

Woodhead - Molex

TERM BLOCK HDR 4POS 90DEG 5MM

0

0395224018

0395224018

Woodhead - Molex

TERM BLOCK HDR 18POS 90DEG 5MM

0

0395105105

0395105105

Woodhead - Molex

TERM BLOCK PLUG 5POS STR 3.81MM

0

0395287012

0395287012

Woodhead - Molex

TERM BLOCK HDR 12POS VERT 5MM

0

0395345615

0395345615

Woodhead - Molex

TERM BLOCK PLUG 15POS STR 5.08MM

0

0395233323

0395233323

Woodhead - Molex

TERM BLOCK PLUG 23POS 90DEG 5MM

0

0395205122

0395205122

Woodhead - Molex

TERM BLOCK PLUG 22POS STR 5MM

0

0395238323

0395238323

Woodhead - Molex

TERM BLOCK PLUG 23POS 90DEG 5MM

0

0395338912

0395338912

Woodhead - Molex

TERM BLOCK PLUG 12POS 5.08MM

0

0395238815

0395238815

Woodhead - Molex

TERM BLOCK PLUG 15POS 90DEG 5MM

0

0395378913

0395378913

Woodhead - Molex

TERM BLOCK PLUG 13POS 5.08MM

0

0395137502

0395137502

Woodhead - Molex

TERM BLOCK PLUG 2POS 3.81MM

0

0395000106

0395000106

Woodhead - Molex

TERM BLOCK PLUG 6POS STR 3.5MM

0

0395350010

0395350010

Woodhead - Molex

TERM BLOCK HDR 10POS VERT 5.08MM

0

0397370008

0397370008

Woodhead - Molex

TERM BLOCK HDR 8POS VERT 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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