Terminal Blocks - Accessories

Image Part Number Description / PDF Quantity Rfq
1887240000

1887240000

Weidmuller

CONN TERM BLK END PLATE BEIGE

60

1571720000

1571720000

Weidmuller

CONN TERM BLK LOCKS PC MT ORANGE

0

1771880000

1771880000

Weidmuller

CONN TERM BLK SEPARATOR ORANGE

0

1071000000

1071000000

Weidmuller

CONN TERM BLK TEST SOCKET

50

1770890000

1770890000

Weidmuller

CONN TERM BLK END PLATE RAIL ORG

0

1050160000

1050160000

Weidmuller

CONN TERM BLK END PLATE RAIL ORG

0

0297100000

0297100000

Weidmuller

CONN TERM BLK PARTITION RAIL BLU

0

1697820000

1697820000

Weidmuller

CONN TERM BLK INT JUMPER GREEN

0

1781690000

1781690000

Weidmuller

CONN TERM BLK COVER BLACK 32POS

0

1770880000

1770880000

Weidmuller

CONN TERM BLK END PLATE RAIL BLU

0

1068400000

1068400000

Weidmuller

CONN TERM BLK PARTITION RAIL BG

20

0438560000

0438560000

Weidmuller

CONN TERM BLK END PLATE RAIL

0

1771870000

1771870000

Weidmuller

CONN TERM BLK SEPARATOR BEIGE

0

1005360000

1005360000

Weidmuller

CONN TERM BLK COVER BLACK 11POS

0

1855230000

1855230000

Weidmuller

CONN TERM BLK END PLATE ORANGE

0

0550920000

0550920000

Weidmuller

CONN TERM BLK END PLATE RAIL YLW

0

1979740000

1979740000

Weidmuller

CONN TERM BLK LGT PIPE CLR 8POS

0

1328560000

1328560000

Weidmuller

CONN TERM BLK COVER ORANGE 22POS

0

1600490000

1600490000

Weidmuller

CONN TERM BLK CLAMP YOKE

790

0475480000

0475480000

Weidmuller

CONN TERM BLK INSUL CAP BLUE

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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