Terminal Blocks - Headers, Plugs and Sockets

Image Part Number Description / PDF Quantity Rfq
EDZ1100/3

EDZ1100/3

On-Shore Technology, Inc.

TERM BLOCK PLUG 3POS 5.08MM

169

OSTOQ025351

OSTOQ025351

On-Shore Technology, Inc.

TERM BLOCK HDR 2POS 90DEG 5.08MM

1121

OSTV7055150

OSTV7055150

On-Shore Technology, Inc.

TERM BLOCK HDR 5POS VERT 5.08MM

0

EDSTLZ990/15

EDSTLZ990/15

On-Shore Technology, Inc.

TERM BLOCK HDR 15POS 5.08MM

0

EDSTL130/21

EDSTL130/21

On-Shore Technology, Inc.

TERM BLOCK HDR 21POS VERT 5MM

0

OSTTJ1031530

OSTTJ1031530

On-Shore Technology, Inc.

TERM BLOCK PLUG 10POS STR 3.81MM

8767

EDSTLZ1555/3

EDSTLZ1555/3

On-Shore Technology, Inc.

TERM BLOCK HDR 3POS VERT 3.81MM

3055

EDZ1200/7

EDZ1200/7

On-Shore Technology, Inc.

TERM BLOCK PLUG 7POS STR 5.08MM

0

OSTTJ025153

OSTTJ025153

On-Shore Technology, Inc.

TERM BLOCK PLUG 2POS STR 5.08MM

25082

EDSTL955/8

EDSTL955/8

On-Shore Technology, Inc.

TERM BLOCK HDR 8POS VERT 5MM

17709

EDSTLZ960/8

EDSTLZ960/8

On-Shore Technology, Inc.

TERM BLOCK HDR 8POS 90DEG 7.62MM

0

EDSTL955/16

EDSTL955/16

On-Shore Technology, Inc.

TERM BLOCK HDR 16POS VERT 5MM

0

OSTTJ0431530

OSTTJ0431530

On-Shore Technology, Inc.

TERM BLOCK PLUG 4POS STR 3.81MM

18607

EDSTLZ955/18

EDSTLZ955/18

On-Shore Technology, Inc.

TERM BLOCK HDR 18POS VERT 5.08MM

0

OSTTS05315B

OSTTS05315B

On-Shore Technology, Inc.

TERM BLOCK PLUG 5POS 3.81MM

96

OSTOQ027051

OSTOQ027051

On-Shore Technology, Inc.

TERM BLOCK HDR 2POS 90DEG 5MM

700

ED950/3

ED950/3

On-Shore Technology, Inc.

TERM BLOCK PLUG 3POS STR 5MM

2787

ED1110/3

ED1110/3

On-Shore Technology, Inc.

TERM BLOCK PLUG 3POS 270DEG 5MM

0

ED1100/3

ED1100/3

On-Shore Technology, Inc.

TERM BLOCK PLUG 3POS 90DEG 5MM

0

EDSTL955/10

EDSTL955/10

On-Shore Technology, Inc.

TERM BLOCK HDR 10POS VERT 5MM

29

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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