Cooling Fins/Structure: Fin Height 20-100 mm

Component Specifications

Definition

Cooling fins/structures are engineered components attached to transition resistors/reactors to enhance heat dissipation through convection and radiation. They consist of extended surfaces (fins) that maximize contact with ambient air, reducing operating temperatures and preventing thermal overload in electrical systems. These structures are critical for maintaining component reliability, efficiency, and lifespan by managing heat generated during electrical resistance transitions.

Working Principle

Cooling fins operate on the principle of extended surface heat transfer. By increasing the surface area exposed to ambient air, they facilitate convective heat dissipation. Heat from the resistor/reactor core conducts through the fin base material, then transfers to air via convection. Fin geometry (height, thickness, spacing) is optimized to balance thermal resistance, airflow, and structural integrity, following Fourier's law of heat conduction and Newton's law of cooling.

Materials

Typically aluminum alloys (e.g., 6061, 6063) for high thermal conductivity and lightweight properties; copper alloys for superior conductivity in high-performance applications; sometimes steel with thermal coatings. Materials must have thermal conductivity >150 W/m·K, corrosion resistance, and mechanical strength for mounting.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Fin Height	20-100 mm
Fin Spacing	3-10 mm
Fin Thickness	1-3 mm
Base Thickness	5-15 mm
Mounting Method	Bolt-on, welded, or integrated
Thermal Conductivity	>150 W/m·K
Surface Area Multiplier	5-20x base area
Operating Temperature Range	-40°C to 200°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 13732-1, DIN 43735, IEC 60076, ASTM B209

Parent Products

This component is used in the following industrial products

Transition Resistor/Reactor

Electrical component within a Diverter Switch for On-Load Tap Changers (OLTC) that manages current flow during tap transitions.

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Engineering Analysis

Risks & Mitigation

Insufficient cooling leading to thermal failure
Corrosion reducing thermal efficiency
Mechanical vibration causing fin damage
Improper mounting creating thermal bottlenecks

FMEA Triads

Trigger: Inadequate fin surface area or poor airflow
Failure: Overheating of resistor/reactor
Mitigation: Implement thermal simulation during design, ensure proper ventilation, use temperature sensors

Trigger: Material corrosion or oxidation
Failure: Reduced thermal conductivity
Mitigation: Use corrosion-resistant alloys, apply protective coatings, regular maintenance inspection

Trigger: Mechanical stress from vibration
Failure: Fin cracking or detachment
Mitigation: Design with vibration damping, use reinforced mounting, periodic structural checks

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5 mm on critical dimensions, flatness within 0.2 mm over 100 mm

Test Method

Thermal imaging for heat distribution, airflow measurement, thermal resistance testing per IEC 60529

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Cooling Fins/Structure

Manufacturer profiles associated with Cooling Fins/Structure.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Terminal Base

A terminal base is an insulating support structure that holds and organizes electrical terminals in motor terminal blocks, providing secure connections and circuit management.

Contact Plate

A conductive plate in motor terminal blocks that establishes electrical contact between conductors.

Marking Strip

A durable marking strip used for terminal identification in motor terminal blocks to ensure proper electrical connections and safety compliance.

Gland Body

A gland body is the main housing component of an aluminum cable gland that provides mechanical protection and environmental sealing for electrical cables entering enclosures.

Frequently Asked Questions

Why are cooling fins important for transition resistors/reactors?

They prevent thermal runaway, maintain electrical efficiency, and extend component lifespan by dissipating heat generated during resistance changes.

What materials are best for cooling fins?

Aluminum alloys offer the best balance of thermal conductivity, weight, and cost; copper provides superior performance but at higher cost and weight.

How do fin spacing and height affect cooling performance?

Closer spacing increases surface area but may restrict airflow; taller fins provide more area but require structural support. Optimal design balances these factors.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Cooling Fins/Structure