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Ushio USH250D 250W High Pressure Mercury Lamp

Ushio USH250D 250W High Pressure Mercury Lamp

$496.00
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SKU:
USH250D (5000503)
UPC:
048777292716
Availability:
Stock Item
Shipping:
Calculated at Checkout
Quantity Option (Each):
1 Bulb
Product Description
Super high-pressure mercury short-arc lamp engineered for semiconductor and precision optical UV exposure systems.
SOSCleanroom
Overview

The Ushio USH250D is a 250W super high-pressure mercury lamp designed for optical and semiconductor tools that require strong output at key UV wavelengths and stable radiant power over long operating intervals. This lamp is engineered to closely approximate a near point light source, allowing the emitted radiation to be efficiently concentrated or dispersed for uniform irradiation distribution in optical systems. SKU: USH250D (5000503). UPC: 048777292716.

Key Highlights
  • Mfg. Ordering Code: 5000503
  • Rated Power: 250W
  • Rated Voltage: 40V
  • Rated Current: 6.5A
  • Total Luminous Flux: 12,500 lm
  • Average Life: 1,000 hours
  • Designed Peak Output Region: 436nm, 405nm, 365nm (UV/blue)
  • Availability: Stock Item
Typical Applications
  • Semiconductor and photolithography exposure/processing tools
  • Optical UV irradiation systems requiring concentrated, uniform output
  • Equipment noted for use: PLA501FA and PLA600F & FA tools
Handling Tip
High-pressure mercury lamps operate at extreme temperature and pressure and emit intense UV. Operate only in properly designed lamp housings (typically enclosed and interlocked), and allow the lamp to cool before handling. For contamination control, use clean nitrile gloves and a lint-free wipe during installation to avoid residue transfer and to reduce particulate introduction into the tool area.
About Ushio
Ushio is a global photonics and specialty lighting company focused on “Applying Light to Life,” delivering light sources and light-based solutions across industrial markets (including semiconductor-related applications), visual imaging, and life sciences. Ushio’s portfolio spans specialty lamps and integrated optical technologies designed for demanding performance and reliability requirements.
Trusted Distribution
SOSCleanroom (Specialty Optical Systems, Inc.) has been a specialty lighting distribution partner for over 40 years, supporting customers who rely on consistent lamp performance in scientific, industrial, and semiconductor environments.
Industry Update
In July 2025, Ushio announced an agreement to acquire ams OSRAM’s Entertainment & Industry Lamps (ENI) business, with closing expected by the end of March 2026. During and after a transition, customers may see changes such as branding, labeling, packaging, and distribution channels. Best practice: qualify replacements by the manufacturer code and critical specs (250W, 40V, 6.5A) to maintain continuity.
Need help selecting the right product?
If you need additional information please try our SOSCleanroom specific AI ChatBot which draws from our extensive cleanroom specific libraries.
Always confirm compatibility with your equipment model, required electrical operating conditions (40V / 6.5A), and the OEM lamp housing/cooling requirements prior to installation.
The Technical Vault
By SOSCleanroom
Arc Physics & Tool Compatibility
Ignition & Ballast Spectral Output Optical Coupling Thermal & Safety Cleanroom Considerations
Quick Specs
Product / SKU Ushio USH250D (5000503)
Lamp Type / Technology Super high-pressure mercury short-arc (UV/blue-optimized)
Rated Power 250W
Rated Electrical 40V / 6.5A
Key Wavelength Region 436nm, 405nm, 365nm (UV/blue region)
Total Luminous Flux 12,500 lm
Average Life 1,000 hours
Equipment Noted for Use PLA501FA and PLA600F & FA tools
UPC 048777292716
How a Super High-Pressure Mercury Short-Arc Lamp Produces Light
A super high-pressure mercury lamp is a gas-discharge arc source built around a compact quartz arc tube containing mercury (often with a starter gas). When the power supply applies the correct ignition conditions, an electrical discharge forms between closely spaced electrodes, creating a dense plasma. As the lamp warms, mercury vapor pressure increases dramatically (often to tens of atmospheres in high-pressure arc systems), producing extremely high luminance from a very small emitting volume.
The light output is dominated by characteristic mercury emission lines. For semiconductor and precision optical exposure, systems commonly leverage the strong UV/blue region around 365nm, 405nm, and 436nm. In photolithography contexts these are frequently referred to as i-line (365nm), h-line (405nm), and g-line (436nm), and optical systems typically filter and shape the spectrum to match process needs.
The “short-arc” geometry is the engineering advantage: because the arc size is near a point source, optical designers can efficiently collect, collimate, and project energy through condensers, integrators, and homogenizers to achieve uniform irradiance at the target plane—critical for repeatable exposure and inspection performance.
Engineering Notes Buyers Should Care About
  • Ignition & ballast matching: These lamps require a purpose-designed power supply/ballast to ignite and then tightly regulate current. Using the wrong supply can cause hard starting, unstable arc, reduced output, or premature failure.
  • Arc stability and alignment: In short-arc mercury families, electrode design and precision burner alignment are key to high luminance and stable arc behavior—this directly impacts coupling efficiency into the optical train and irradiance uniformity.
  • Thermal management: High-pressure mercury arcs generate intense heat. Lamp housings commonly rely on forced-air or engineered cooling paths; restricted airflow can accelerate seal degradation and reduce lifetime.
  • Optical cleanliness: Deposits on lamp windows, reflectors, or condenser optics reduce delivered irradiance and can skew dose uniformity. Treat lamp replacement like controlled maintenance: minimize debris, use low-lint materials, and keep adjacent optical surfaces clean.
Safety & Handling (High Pressure + UV)
Contains mercury and emits strong UV radiation. Operate only in properly designed enclosed lamp housings (commonly interlocked). Allow sufficient cool-down time before servicing. Follow the tool OEM’s lamp change procedure, PPE requirements, and disposal guidelines.
Cleanroom note: Stage clean nitrile gloves and a cleanroom-grade lint-free wipe before opening the lamp compartment to reduce contamination risk and to prevent residue transfer during handling.
Industry Update: ENI Business Transition (Expected Close by End of March 2026)
ams OSRAM announced the sale of its Entertainment & Industry Lamps (ENI) business to Ushio for EUR 114m, with closing expected by the end of March 2026 and approximately 500 employees transitioning. Practical takeaway: keep your internal records anchored on the manufacturer ordering code (e.g., 5000503) and qualifying specs (250W, 40V, 6.5A, wavelength region) to support procurement continuity through labeling/branding changes.
Need deeper specs or cross-references?
If you need additional information please try our SOSCleanroom specific AI ChatBot which draws from our extensive cleanroom specific libraries.
For mission-critical optical systems, validate OEM requirements for ballast/power supply, lamp housing/cooling, interlocks, and optical alignment before use.