Terminal Blocks - Accessories

Image Part Number Description / PDF Quantity Rfq
281-309

281-309

WAGO

END AND INTERMEDIATE PLATE; 2.5

183

249-117

249-117

WAGO

SCREWLESS END STOP; 10 MM WIDE;

388

2002-1491

2002-1491

WAGO

END AND INTERMEDIATE PLATE; 0.8

267

2016-1292

2016-1292

WAGO

END AND INTERMEDIATE PLATE; 1 MM

92

734-230

734-230

WAGO

PUSH-BUTTON

2615

281-335

281-335

WAGO

END AND INTERMEDIATE PLATE; 2.5

187

2004-1491

2004-1491

WAGO

END AND INTERMEDIATE PLATE; 1 MM

250

281-328

281-328

WAGO

END AND INTERMEDIATE PLATE; 2.5

180

282-317

282-317

WAGO

END AND INTERMEDIATE PLATE; 4 MM

200

264-361

264-361

WAGO

END PLATE; WITH FIXING FLANGE; 4

860

859-525

859-525

WAGO

END AND INTERMEDIATE PLATE; 1 MM

367

281-512/281-501

281-512/281-501

WAGO

FUSE PLUG; WITH PULL-TAB; FOR MI

50

2004-1492

2004-1492

WAGO

END AND INTERMEDIATE PLATE; 1 MM

300

2006-1391

2006-1391

WAGO

END AND INTERMEDIATE PLATE; 1 MM

189

870-568

870-568

WAGO

END AND INTERMEDIATE PLATE; 2 MM

200

2000-1291

2000-1291

WAGO

END AND INTERMEDIATE PLATE; 0.7

182

209-137

209-137

WAGO

MOUNTING ADAPTER; CAN BE USED AS

410

2000-1292

2000-1292

WAGO

END AND INTERMEDIATE PLATE; 0.7

184

2002-1494

2002-1494

WAGO

SEPARATOR PLATE; 2 MM THICK; OVE

124

2000-1491

2000-1491

WAGO

END AND INTERMEDIATE PLATE; 0.7

200

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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