Terminal Blocks - Accessories

Image Part Number Description / PDF Quantity Rfq
231-131

231-131

WAGO

PUSH-BUTTON; LOOSE

965

0485660000

0485660000

Weidmuller

CONN TERM BLK RETAIN PLATE BEIGE

15360

0446300000

0446300000

Weidmuller

SBL/2489

0

1167640000

1167640000

Weidmuller

CONN TERM BLK FUSE HLDR BLACK

39490

1837337

1837337

Phoenix Contact

CONN TERM BLK CABLE HSG GRN 4POS

20

1784210000

1784210000

Weidmuller

CONN TERM BLK END PLATE RAIL BG

110120

TCABLE-J

TCABLE-J

American Electrical, Inc.

CONN TERM BLK THERMOCOUP WIRE J

0

0310020

0310020

Phoenix Contact

CONN TERM BLK END PLATE RAIL GRY

501000

0921040

0921040

Phoenix Contact

CONN TERM BLK FUSE PLUG BLACK

4

1437381-4

1437381-4

TE Connectivity AMP Connectors

CONN TERM BLK CHAN CLAMP

18

3036836

3036836

Phoenix Contact

CONN TERM BLK FUSE PLUG BLACK

12380

1211460000

1211460000

Weidmuller

CONN TERM BLK END PLATE RAIL GRY

373

0485760000

0485760000

Weidmuller

CONN TERM BLK RETAIN PLATE BEIGE

48440

DP4C

DP4C

DINKLE Corporation USA

TERM BLK END PLATE

7048

462127

462127

American Electrical, Inc.

AVK 10 APP PARTITION ORANGE 2.5-

0

0706799

0706799

Phoenix Contact

CONN TERM BLK SEPARATOR GRAY

0

0294420000

0294420000

Weidmuller

CONN TERM BLK END PLATE RAIL BG

558320

1701967

1701967

Phoenix Contact

CONN TERM BLK KEYING STAR RED

1991116800

1414022

1414022

Phoenix Contact

CONN TERM BLK END PLATE BLUE

0

3069953

3069953

Phoenix Contact

CONN TERM BLK TEST PLG GRY 14POS

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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