INDUSTRY COMPONENT

Terminal Board

A terminal board is an insulated mounting platform with multiple connection points for organizing and securing electrical wires in industrial equipment.

View Specifications

Component Specifications

Definition
A terminal board, also known as a terminal block or connection strip, is a modular, insulated device used in electrical systems to create secure, organized connections between multiple wires. In industrial applications like main transformers, it provides a centralized point for connecting incoming and outgoing circuits, facilitating maintenance, testing, and circuit modifications while ensuring electrical isolation and safety.
Working Principle
The terminal board operates by providing metal terminals (usually made of copper or brass) embedded in an insulating base (typically thermoplastic or thermoset material). Wires are secured to these terminals via screws, clamps, or spring mechanisms, establishing electrical continuity between connected circuits while preventing short circuits and maintaining proper insulation resistance.
Materials
Base: Polyamide (PA66), phenolic resin, or polycarbonate with UL94 V-0 flame retardant rating. Terminals: Electrolytic copper (Cu-ETP) or brass with tin or nickel plating for corrosion resistance. Screws: Steel with zinc or chrome plating.
Technical Parameters
  • IP Rating IP20 (standard) to IP67 (protected)
  • Mounting Type DIN rail (TS35/TS32), panel, or PCB
  • Current Rating 10A to 300A
  • Voltage Rating Up to 1000V AC/DC
  • Wire Size Range 0.5 mm² to 150 mm²
  • Dielectric Strength 3000V AC for 1 minute
  • Insulation Resistance >1000 MΩ
  • Operating Temperature -40°C to +120°C
Standards
ISO 9001, IEC 60947-7-1, UL 1059, DIN 46277

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Terminal Board.

terminal board electrical terminal block connection strip DIN rail terminal industrial wiring transformer components electrical safety wire connectors Terminal Board in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Main Transformer

The primary voltage transformation component in a rectifier power supply system that steps down or steps up AC voltage to the required level before rectification.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Electrical shock from exposed terminals
  • Overheating due to loose connections or overcurrent
  • Short circuits from insulation failure
  • Corrosion leading to increased resistance
FMEA Triads
Trigger: Loose terminal screws due to vibration or improper torque
Failure: Increased contact resistance leading to overheating and potential fire
Mitigation: Use spring-clamp terminals, apply correct torque during installation, and implement regular maintenance checks
Trigger: Moisture ingress or chemical exposure
Failure: Corrosion of terminals, reduced conductivity, and insulation breakdown
Mitigation: Select IP-rated or sealed terminal boards, use protective coatings, and control environmental conditions
Trigger: Overloading beyond current rating
Failure: Melting of insulation, terminal damage, and circuit failure
Mitigation: Properly size terminal boards for expected load, install overcurrent protection devices, and monitor operating conditions

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Terminal position tolerance ±0.5mm, screw torque tolerance ±10% of specified value
Test Method
Dielectric strength test per IEC 60947-7-1, current carrying capacity test at rated current until thermal equilibrium, insulation resistance test at 500V DC

Buyer Feedback

★★★★☆ 4.9 / 5.0 (16 reviews)

"The Terminal Board we sourced perfectly fits our Electrical Equipment Manufacturing production line requirements."

"Found 12+ suppliers for Terminal Board on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Terminal Board is very thorough, especially regarding technical reliability."

Related Components

Induction Coil
Induction coil is a critical component in electromagnetic induction heaters that generates alternating magnetic fields to induce eddy currents in conductive materials for precise, contactless heating.
Protective Housing
Protective housing for industrial wireless power transfer modules, providing environmental protection, EMI shielding, and thermal management.
Alignment System
Precision alignment system for industrial wireless power transfer modules ensuring optimal energy coupling efficiency.
Winding Spindle
A precision rotating shaft in transformer winding machines that holds and rotates the coil form during wire winding operations.

Frequently Asked Questions

What is the difference between a terminal board and a terminal block?

A terminal board typically refers to a larger assembly with multiple terminals mounted on a single base, often used in panels, while a terminal block is a modular single unit that can be combined on a DIN rail. In practice, the terms are often used interchangeably.

How do I select the right terminal board for a main transformer?

Consider the transformer's voltage and current ratings, environmental conditions (temperature, humidity), required safety certifications (e.g., UL, IEC), wire sizes, and mounting method. Always consult the transformer manufacturer's specifications.

Can terminal boards be used in high-vibration environments?

Yes, but choose models with vibration-resistant features like spring-clamp terminals, locking screws, or additional securing brackets to prevent loosening.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Get Quote for Terminal Board

Terminal Blocks Terminal Clamp