Terminal Blocks - Accessories

Image Part Number Description / PDF Quantity Rfq
2010-1291

2010-1291

WAGO

END AND INTERMEDIATE PLATE; 1 MM

214

0717092

0717092

Phoenix Contact

CONN TERM BLK SPACER

0

0804271

0804271

Phoenix Contact

CONN TERM BLK END CLAMP BLACK

100

0704021

0704021

Phoenix Contact

CONN TERM BLK END PLATE GRAY

53

1058800000

1058800000

Weidmuller

CONN TERM BLK END PLATE RAIL BG

2789780

5602112

5602112

Phoenix Contact

MODBUS PLUS TAP MODULE

192

1878560000

1878560000

Weidmuller

CONN TERM BLK COMP PLUG BEIGE

45

3246862

3246862

Phoenix Contact

CONN TERM BLK END PLATE GRAY

0

XW5E-P4.0-1.2-1

XW5E-P4.0-1.2-1

Omron Automation & Safety Services

CONN TERM BLK END PLATE

50

280-341

280-341

WAGO

END AND INTERMEDIATE PLATE; 2.5

180

1920956

1920956

Phoenix Contact

CONN TERM BLK CABLE HSG BLACK 5P

30

1608820000

1608820000

Weidmuller

CONN TERM BLK END PLATE RAIL ORG

325

0303406

0303406

Phoenix Contact

CONN TERM BLK TEST SCKT BLACK 1P

154

1142990000

1142990000

Weidmuller

CONN TERM BLK END PLATE BEIGE

6591400

1896290000

1896290000

Weidmuller

CONN TERM BLK END PLATE RAIL BG

388

1790647

1790647

Phoenix Contact

CONN TERM BLK KEYING STAR NATURL

34

3036806

3036806

Phoenix Contact

CONN TERM BLK FUSE PLUG BLACK

1367000

XW5E-P2.5-1.1-2

XW5E-P2.5-1.1-2

Omron Automation & Safety Services

CONN TERM BLK END PLATE

50

1783834

1783834

Phoenix Contact

CONN TERM BLK CABLE HSG GN 14POS

9

3240210

3240210

Phoenix Contact

CONN TERM BLK SHIELD CONN

49

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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