Terminal Blocks - Accessories

Image Part Number Description / PDF Quantity Rfq
C9040396

C9040396

Weidmuller

CONN TERM BLK END PLATE

656

1632100000

1632100000

Weidmuller

CONN TERM BLK END PLATE RAIL BLU

352200

1748800000

1748800000

Weidmuller

CONN TERM BLK END PLATE RAIL BLU

31460

1064660000

1064660000

Weidmuller

CONN TERM BLK COVER BEIGE

40100

1749580000

1749580000

Weidmuller

CONN TERM BLK END PLATE RAIL BG

641080

2570230000

2570230000

Weidmuller

A-SERIES, END BRACKET

10

1783800000

1783800000

Weidmuller

CONN TERM BLK END PLATE BEIGE

10580

7904210000

7904210000

Weidmuller

CONN TERM BLK END PLATE BEIGE

143

7907370000

7907370000

Weidmuller

CONN TERM BLK END PLATE BEIGE

30

0191320000

0191320000

Weidmuller

CONN TERM BLK PARTITION RAIL

1781000

1934690000

1934690000

Weidmuller

PAP PTR2.5/4/3AN

680

1855220000

1855220000

Weidmuller

CONN TERM BLK END PLATE BEIGE

50

1674800000

1674800000

Weidmuller

CONN TERM BLK MNT RAIL SUP

1680

1723470000

1723470000

Weidmuller

CONN TERM BLK LOCKS PC MT ORANGE

220

1608810000

1608810000

Weidmuller

CONN TERM BLK END PLATE RAIL BLU

334

0359260000

0359260000

Weidmuller

CONN TERM BLK END PLATE RAIL BG

298

7904100000

7904100000

Weidmuller

CONN TERM BLK END PLATE BEIGE

36

1839850000

1839850000

Weidmuller

CONN TERM BLK END PLATE BEIGE

3

1745600000

1745600000

Weidmuller

CONN TERM BLK COVER BLACK 5POS

0

1937020000

1937020000

Weidmuller

CONN TERM BLK SPACER GRAY

300

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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