Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
31041116

31041116

RIA Connect / METZ CONNECT

PIN HEADER, BACKWALL, VERTICAL,

0

31049118

31049118

RIA Connect / METZ CONNECT

SCREW TYPE TERMINAL BLOCK, PLUG,

0

31176112

31176112

RIA Connect / METZ CONNECT

SHROUDED HEADER, RIGHT ANGLE, TH

0

31249121

31249121

RIA Connect / METZ CONNECT

SCREW TYPE TERMINAL BLOCK, PLUG,

0

ASP0841406

ASP0841406

RIA Connect / METZ CONNECT

SPRING CLAMP TERMINAL BLOCK, PLU

0

31393118

31393118

RIA Connect / METZ CONNECT

SHROUDED HEADER, VERTICAL, FLANG

0

ASP0452022

ASP0452022

RIA Connect / METZ CONNECT

SPRING CLAMP TERMINAL BLOCK, PLU

0

31107123

31107123

RIA Connect / METZ CONNECT

SCREW TYPE TERMINAL BLOCK, PLUG,

0

ASP0451522

ASP0451522

RIA Connect / METZ CONNECT

SPRING CLAMP TERMINAL BLOCK, PLU

0

ASP0252404

ASP0252404

RIA Connect / METZ CONNECT

SPRING CLAMP TERMINAL BLOCK, PLU

0

31392118

31392118

RIA Connect / METZ CONNECT

SHROUDED HEADER, RIGHT ANGLE, FL

0

ASP0451922

ASP0451922

RIA Connect / METZ CONNECT

SPRING CLAMP TERMINAL BLOCK, PLU

0

31249115

31249115

RIA Connect / METZ CONNECT

SCREW TYPE TERMINAL BLOCK, PLUG,

0

ASP0451722

ASP0451722

RIA Connect / METZ CONNECT

SPRING CLAMP TERMINAL BLOCK, PLU

0

31349123

31349123

RIA Connect / METZ CONNECT

SCREW TYPE TERMINAL BLOCK, PLUG,

0

31157115

31157115

RIA Connect / METZ CONNECT

SCREW TYPE TERMINAL BLOCK, PLUG,

0

31157122

31157122

RIA Connect / METZ CONNECT

SCREW TYPE TERMINAL BLOCK, PLUG,

0

31349122

31349122

RIA Connect / METZ CONNECT

SCREW TYPE TERMINAL BLOCK, PLUG,

0

31020121

31020121

RIA Connect / METZ CONNECT

SHROUDED HEADER, VERTICAL, PCB,

0

31369123

31369123

RIA Connect / METZ CONNECT

SCREW TYPE TERMINAL BLOCK, PLUG,

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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