Terminal Blocks - Accessories

Image Part Number Description / PDF Quantity Rfq
1866240000

1866240000

Weidmuller

CONN TERM BLK MNT BRACKET YELLOW

0

2507090000

2507090000

Weidmuller

CONN TERM BLK COVER BLACK 7POS

0

1781600000

1781600000

Weidmuller

CONN TERM BLK COVER BLACK 14POS

0

1768520000

1768520000

Weidmuller

CONN TERM BLK END PLATE RAIL BLU

0

0244060000

0244060000

Weidmuller

CONN TERM BLK COVER BEIGE 2POS

0

1780670000

1780670000

Weidmuller

CONN TERM BLK TEST PLG ADPT BLK

0

0351820000

0351820000

Weidmuller

CONN TERM BLK PARTITION RAIL

20

0556800000

0556800000

Weidmuller

CONN TERM BLK BUSBAR SUP

0

910026

910026

Weidmuller

CONN TERM BLK EDGE CARD HOLDER

0

1005350000

1005350000

Weidmuller

CONN TERM BLK COVER BLACK 10POS

0

0380380000

0380380000

Weidmuller

CONN TERM BLK END PLATE RAIL BLU

0

1269050000

1269050000

Weidmuller

EW 35 DB

200

1857840000

1857840000

Weidmuller

CONN TERM BLK

0

0326960000

0326960000

Weidmuller

CONN TERM BLK COVER BEIGE

0

1651990000

1651990000

Weidmuller

CONN TERM BLK MT BASE RAIL BG 2P

0

1816040000

1816040000

Weidmuller

CONN TERM BLK END PLATE ORANGE

0

1897000000

1897000000

Weidmuller

CONN TERM BLK INSUL SLEEVE

0

1652200000

1652200000

Weidmuller

CONN TERM BLK STRN REL BK 3POS

0

1706130000

1706130000

Weidmuller

CONN TERM BLK END PLATE RAIL ORG

250

1861030000

1861030000

Weidmuller

CONN TERM BLK COVER YELLOW

0

Terminal Blocks - Accessories

1. Overview

Terminal Blocks Accessories are modular devices used to secure and manage electrical connections in various systems. They include components like terminal covers, marking strips, bridging pieces, and grounding terminals. These accessories enhance safety, improve connectivity reliability, and facilitate maintenance in electrical installations. With the rise of smart infrastructure and Industry 4.0, terminal blocks accessories have become critical in ensuring efficient power distribution and signal transmission across industries.

2. Main Types and Functional Classification

TypeFunctional FeaturesApplication Examples
Terminal CoversProtect against dust, moisture, and accidental contactIndustrial control panels
Marking StripsEnable circuit identification via labelingElectrical cabinets in HVAC systems
Bridging PiecesAllow parallel connections between adjacent terminalsPower distribution blocks
Grounding TerminalsProvide safe earthing paths for equipmentMachinery grounding systems
Fuse HoldersIntegrate circuit protection with terminal blocksControl circuits in renewable energy systems

3. Structure and Components

Typical terminal blocks accessories consist of: - Insulation Housing: Made from flame-retardant thermoplastics (e.g., PA66) - Conductive Elements: Brass or phosphor bronze contacts with tin/silver plating - Clamping Mechanism: Screw-type, spring-cage, or push-in connectors - Identification Features: Laser-markable surfaces or insertable labels - Mounting Base: DIN rail compatible or panel-mount designs

4. Key Technical Specifications

ParameterTypical RangeImportance
Rated Current1-300ADetermines power handling capacity
Rated Voltage50-1000VEnsures insulation safety
Contact Resistance<10m Affects connection efficiency
Insulation Resistance>100M Prevents leakage current
Operating Temperature-40 C to +120 CEnsures reliability in harsh environments
Short-Circuit Withstand10-100kACritical for industrial safety

5. Application Fields

Major industries include:

  • Industrial Automation: PLC control cabinets, motor drives
  • Energy Systems: Solar inverters, wind turbine controllers
  • Transportation: Rail vehicle electrical systems, EV charging stations
  • Telecom Infrastructure: Base station power distribution
  • Building Automation: HVAC control systems, smart lighting

Example: In smart grid substations, grounding terminals protect SCADA systems from surges.

6. Leading Manufacturers and Products

ManufacturerKey ProductsSpecial Features
Phoenix ContactPTFIX seriesModular plug-in system
Weidm llerSAM seriesTool-free connection technology
TE ConnectivityMini Universal seriesCompact 5.0mm pitch
Wago285 seriesCAGE CLAMP spring connection
OMRONV-terminal seriesVibration-resistant screw terminals

7. Selection Guide

Key considerations:

  1. Electrical Requirements: Match current/voltage ratings with system needs
  2. Environmental Factors: Consider temperature, humidity, and vibration
  3. Installation Type: DIN rail vs. PCB mounting
  4. Certifications: UL, CE, RoHS compliance
  5. Maintenance Needs: Choose between screw-type (high reliability) or push-in (fast installation)

Case Study: For outdoor wind turbine control cabinets, specify IP67-rated terminal covers with UV-resistant materials.

8. Industry Trends

Emerging trends include:

  • Miniaturization: 2.5mm pitch terminals for compact devices
  • Smart Integration: IoT-enabled terminals with condition monitoring
  • Modular Systems: Customizable blocks with tool-less assembly
  • Material Innovation: Halogen-free flame-retardant polymers
  • Global Standardization: Unified dimensions per IEC 60947-7

Market growth driven by EV charging infrastructure and renewable energy projects, projected at 6.2% CAGR through 2030.

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