Plate: Plate Thickness 0.5-3 mm, Plate Spacing 1-10 mm

Component Specifications

Definition

Arc splitter plates, also known as deion plates, are critical components in electrical interruption devices such as circuit breakers, contactors, and switches. They consist of multiple parallel metal plates separated by insulating materials, arranged within an arc chute. When an electrical arc forms during circuit interruption, these plates split the arc into smaller segments, increasing its voltage requirement and cooling it rapidly through thermal conduction and deionization, thereby extinguishing the arc and preventing damage to equipment.

Working Principle

Arc splitter plates operate on the principle of arc division and cooling. When an electrical arc is drawn between contacts, it is forced into the plate assembly. The plates divide the single arc into multiple shorter arcs in series, each requiring additional voltage to sustain. Simultaneously, the metal plates absorb heat from the arc through thermal conduction, while the insulating gaps promote deionization of the plasma by cooling and recombination of ions, rapidly increasing arc resistance until current cannot be maintained and the arc is extinguished.

Materials

Typically made from steel, stainless steel, or copper alloys for conductive plates, with insulating spacers of ceramic, mica, or high-temperature plastics like polyamide or phenolic resins. Plates are often coated with arc-resistant materials such as zinc or tin to reduce erosion.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Plate Spacing	1-10 mm
Plate Thickness	0.5-3 mm
Operating Voltage	Up to 1000V AC/DC
Dielectric Strength	>10 kV/mm
Temperature Resistance	-40°C to 200°C
Current Interruption Rating	10-6300A

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 8820, DIN EN 60947, IEC 60947

Parent Products

This component is used in the following industrial products

Arc Splitters / Deion Plates

Metallic plates within an arc chute designed to split, cool, and deionize electrical arcs during circuit interruption.

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Engineering Analysis

Risks & Mitigation

Arc flash if plates are damaged or misaligned
Reduced interrupting capacity due to plate erosion
Insulation failure from contamination or overheating

FMEA Triads

Trigger: Plate erosion from repeated arcing
Failure: Reduced arc splitting efficiency, leading to prolonged arcing and potential equipment damage
Mitigation: Use erosion-resistant coatings, regular inspection, and replacement per maintenance schedules

Trigger: Contamination (dust, moisture) on plates
Failure: Decreased dielectric strength, risk of flashover or short circuit
Mitigation: Sealed enclosures, periodic cleaning, and humidity control

Trigger: Incorrect plate spacing or alignment
Failure: Ineffective arc division, overheating, and possible arc reignition
Mitigation: Precision assembly, alignment checks, and adherence to design tolerances

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Plate spacing tolerance ±0.2 mm, flatness within 0.1 mm per 100 mm

Test Method

Dielectric withstand test per IEC 60947, arc interruption testing in certified labs

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

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Manufacturers of Plate

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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

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Frequently Asked Questions

What is the main function of an arc splitter plate?

To extinguish electrical arcs by splitting them into smaller segments, increasing voltage requirement and cooling the plasma to prevent equipment damage.

How do arc splitter plates improve circuit breaker safety?

They rapidly quench arcs during interruption, reducing arcing time, minimizing contact erosion, and preventing fires or insulation failure.

Can arc splitter plates be replaced individually?

Yes, but replacement must match original specifications for material, spacing, and dielectric properties to maintain safety and performance.

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.

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