INDUSTRY COMPONENT

Electrodes

Electrodes are conductive components in UV-C germicidal lamps that initiate and sustain electrical discharge to generate ultraviolet light for disinfection.

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Component Specifications

Definition
Electrodes in UV-C germicidal lamps are critical components that facilitate the electrical discharge process within the lamp's gas-filled tube. They are typically made from specialized metals and alloys that can withstand high temperatures and electrical stresses. When voltage is applied, electrons are emitted from the cathode electrode, ionizing the gas mixture (usually mercury vapor and inert gases) to produce UV-C radiation at 254 nm wavelength. The electrodes must maintain stable arc discharge while resisting sputtering, erosion, and thermal degradation over thousands of operating hours.
Working Principle
Electrodes operate on thermionic emission and field emission principles. The cathode electrode is heated (either directly or indirectly) to release electrons into the gas-filled chamber. These electrons collide with gas atoms, creating plasma through ionization. The anode collects electrons to complete the circuit. This sustained electrical discharge excites mercury atoms, which then emit UV-C photons when returning to ground state. Electrode design ensures consistent electron emission and stable discharge throughout the lamp's lifespan.
Materials
Tungsten wire with thorium or rare-earth oxide coatings (for enhanced electron emission), nickel alloys (for structural components), molybdenum (for lead-in wires), and barium-strontium-calcium carbonate coatings (for electron-emitting surfaces). Electrode assemblies often include coiled or triple-coiled tungsten filaments embedded in ceramic or glass seals.
Technical Parameters
  • Lifespan 8000-16000 hours
  • Resistance 1-50 ohms (cold)
  • Current Range 0.1-3.0A
  • Electrode Gap 10-100mm
  • Voltage Range 50-600V
  • Electrode Type Hot cathode
  • Emission Coating Barium-strontium-calcium oxide
  • Operating Temperature 800-1100°C
Standards
ISO 15858:2016, DIN EN 62471, IEC 61195, ANSI/UL 8800

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Electrodes.

UV-C electrodes germicidal lamp components electrode materials UV disinfection mercury vapor lamps electrode specifications industrial UV systems Electrodes Electrodes in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

UV-C Germicidal Lamp

A specialized ultraviolet lamp that emits UV-C radiation to disinfect surfaces and air by inactivating microorganisms.

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Piezoelectric Actuator

A precision actuator that converts electrical energy into mechanical displacement using the piezoelectric effect.

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Detector Element

Individual sensing unit within a detector array that converts physical signals into measurable electrical outputs.

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Engineering Analysis

Risks & Mitigation
  • Electrical shock hazard during maintenance
  • Mercury exposure if lamp breaks
  • UV radiation exposure
  • Ozone generation (with 185nm lamps)
  • Thermal burns from hot electrodes
FMEA Triads
Trigger: Excessive current causing overheating
Failure: Electrode melting or deformation
Mitigation: Implement current-limiting circuits and thermal sensors
Trigger: Frequent power cycling
Failure: Electrode coating sputtering and depletion
Mitigation: Use soft-start circuits and minimize on/off cycles
Trigger: Vibration or mechanical shock
Failure: Electrode displacement or breakage
Mitigation: Install vibration dampeners and secure mounting

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Electrode positioning tolerance ±0.5mm, emission coating thickness tolerance ±10%, electrical resistance tolerance ±15%
Test Method
High-potential testing (hipot), emission current measurement, thermal cycling tests, lifespan testing per IEC 61195 standards

Buyer Feedback

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

"Reliable performance in harsh Electrical Equipment Manufacturing environments. No issues with the Electrodes so far."

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Frequently Asked Questions

Why do UV-C lamp electrodes fail prematurely?

Premature failure typically results from improper voltage/current settings, excessive cycling (frequent on/off), poor thermal management, or using incompatible ballasts. Electrode erosion and coating depletion accelerate under these conditions.

Can electrodes be replaced separately from the UV-C lamp?

No, electrodes are permanently sealed within the quartz glass tube. When electrodes degrade, the entire lamp assembly must be replaced to maintain vacuum integrity and proper gas mixture.

What maintenance do UV-C electrodes require?

Electrodes require no direct maintenance. However, ensuring stable power supply, proper ballast matching, and avoiding physical vibration extends electrode lifespan. Regular system inspections should check for electrode darkening or deformation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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