Terminal Blocks - Accessories

Image Part Number Description / PDF Quantity Rfq
1697620000

1697620000

Weidmuller

CONN TERM BLK MT BASE RAIL BG 2P

0

1578020000

1578020000

Weidmuller

CONN TERM BLK STRN REL ORAN 8POS

0

0526080000

0526080000

Weidmuller

CONN TERM BLK INSUL CAP BLUE

0

1633260000

1633260000

Weidmuller

CONN TERM BLK END PLATE RAIL BG

0

1050480000

1050480000

Weidmuller

WHP 2.5-10 FOR 6X6 BSBR WM

0

9154860000

9154860000

Weidmuller

CONN TERM BLK END PLATE RAIL BG

0

1683850000

1683850000

Weidmuller

CONN TERM BLK END PLATE RAIL VIO

0

1792430000

1792430000

Weidmuller

CONN TERM BLK END PLATE RAIL BG

0

1791180000

1791180000

Weidmuller

CONN TERM BLK END PLATE RAIL ORG

0

1714940000

1714940000

Weidmuller

CONN TERM BLK STRN REL ORAN 8POS

0

0527200000

0527200000

Weidmuller

LUG KB 10 STRAIGHT

0

1594180000

1594180000

Weidmuller

CONN TERM BLK LGT PIPE CLR 1POS

0

1319360000

1319360000

Weidmuller

CONN TERM BLK DISCON LOCK

0

0258360000

0258360000

Weidmuller

CONN TERM BLK RETAIN PLATE BEIGE

0

0569680000

0569680000

Weidmuller

CONN TERM BLK BUSBAR SUP BLUE

0

0217460000

0217460000

Weidmuller

CONN TERM BLK AIR PRES CONN

0

1595970000

1595970000

Weidmuller

CONN TERM BLK ENDPLTE RAIL 20/BX

0

1698170000

1698170000

Weidmuller

CONN TERM BLK MT BASE RAIL BG 4P

0

1633340000

1633340000

Weidmuller

CONN TERM BLK END PLATE RAIL

0

1714930000

1714930000

Weidmuller

CONN TERM BLK STRN REL ORAN 4POS

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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