Fixed Electrode: Diameter 3-25 mm, Length 10-150 mm

Component Specifications

Definition

A fixed electrode is a precisely manufactured conductive component designed to maintain a stable position within a spark gap assembly, serving as one terminal for controlled electrical discharge processes. It provides consistent electrical contact and gap maintenance for applications requiring precise spark generation, such as in EDM machining, ignition systems, or surge protection devices.

Working Principle

The fixed electrode establishes a controlled gap distance with a movable or opposing electrode. When voltage exceeds the dielectric strength of the gap medium, electrical discharge occurs across the gap, with the fixed electrode providing stable geometry and electrical characteristics for repeatable spark generation.

Materials

High-conductivity copper alloys (C11000, C10100), tungsten-copper composites (WCu10-WCu50), or silver-tungsten alloys for high erosion resistance; surface may feature specialized coatings (chromium, nickel) for enhanced durability.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	10-150 mm
Diameter	3-25 mm
Hardness	80-120 HB
Surface Finish	Ra ≤ 0.8 μm
Thermal Conductivity	≥ 200 W/m·K
Operating Temperature	-40°C to 300°C
Electrical Conductivity	≥ 90% IACS

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 12100, DIN 8580, IEC 60204

Parent Products

This component is used in the following industrial products

Spark Gap Assembly

A precision electrical component that creates a controlled spark discharge for ignition or timing purposes.

View Product Details

Engineering Analysis

Risks & Mitigation

Electrical arcing causing component damage
Thermal degradation from repeated discharges
Erosion altering gap dimensions
Contamination affecting discharge consistency

FMEA Triads

Trigger: Excessive current density
Failure: Localized melting and pitting
Mitigation: Implement current limiting circuits and cooling systems

Trigger: Contaminant buildup on surface
Failure: Unstable discharge characteristics
Mitigation: Regular cleaning protocols and protective enclosures

Trigger: Thermal cycling stress
Failure: Micro-cracking and material fatigue
Mitigation: Use materials with matched thermal expansion coefficients and gradual thermal cycling

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.01 mm dimensional, ±0.005 mm concentricity

Test Method

Coordinate measuring machine verification, electrical resistance testing, spark gap consistency testing per IEC 60060

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 Fixed Electrode

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Zhuzhou Weilai New Materials Technology Co., Ltd.

Zhuzhou, Hunan, CN

Also makes: Spray Nozzle, X-ray Tube

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Fixed electrode”
View source page ↗ en.rheniumcn.com · checked 2026-09-14

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Seal Groove

Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

Frequently Asked Questions

What is the primary function of a fixed electrode in spark gap assemblies?

The fixed electrode maintains precise gap distance and provides stable electrical contact for controlled spark generation, ensuring consistent discharge characteristics in applications like EDM machining or electrical protection systems.

How does material selection affect fixed electrode performance?

Material choice determines erosion resistance, thermal conductivity, and electrical properties. Copper alloys offer excellent conductivity, while tungsten composites provide superior wear resistance in high-energy discharge applications.

What maintenance is required for fixed electrodes?

Regular inspection for erosion, cleaning to remove carbon deposits, and verification of dimensional tolerances. Replacement is needed when erosion exceeds 10% of original dimensions or surface degradation affects discharge consistency.

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.

Fixed Electrode