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Ushio USH508SA 500W Short Arc Mercury Lamp

Ushio USH508SA 500W Short Arc Mercury Lamp

$694.00
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SKU:
USH508SA (5000748)
Availability:
7 - 10 Business Days
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Quantity Option (Each):
1 Bulb
Ushio USH-508SA 500W Short Arc Mercury Lamp
USHIO Super High Pressure UV Lamp • Compact arc for focused UV delivery
SOSCleanroom
Process-focused supply
500W Short Arc Mercury Super High Pressure UV Avg life: 800h
Product Summary

The Ushio USH-508SA is a 500W short-arc mercury super high pressure UV lamp designed for UV optical systems that require a compact arc for efficient focusing and stable irradiance. In these systems, the lamp behaves like an optical component: arc position, operating mode, and cooling discipline determine whether UV delivery stays consistent after replacement.

Quick Specs
Lamp Type
Super High Pressure UV Lamp • Short-arc mercury
Rated Power
500W
Operating Voltage
76V ± 9V
Cold Arc Gap
4 mm
Average Rated Life
800 hours
Note: Operate only in approved, enclosed equipment with correct power supply mode and required cooling.
The Technical Vault
By SOSCleanroom
Lamp Deep Dive
Ushio USH-508SA • 500W • Short Arc Mercury
Constant Power Control Forced Cooling Required Vertical ±15° Hg lamp (disposal)
500W Short-Arc Mercury Lamps: The Three Things That Decide UV Performance (Power Mode, Cooling, and Geometry)
1) Power Supply Mode: Constant Power Control

The USH-508SA is specified for constant power control operation. In super high pressure UV systems, this matters because the lamp’s electrical behavior changes as the discharge stabilizes and as the arc gap and electrodes evolve over life. A supply that does not match the required control mode can show up as unstable irradiance, difficult starting, or reduced usable life.

Ushio also specifies a maximum current ripple limit (P-P) for the supply, which reinforces that stability is a system result: lamp + supply + cabling + igniter.

2) Cooling Is Not Optional

Short-arc mercury lamps run extremely hot at the base and bulb. The USH-508SA specification calls out forced cooling as necessary and defines maximum base temperature and a bulb temperature range. If airflow is restricted (filters loaded, ducting changed, fan aging), the lamp can drift, fail early, or create safety risk.

3) Geometry: Arc Gap and Orientation

Optical systems are built around the arc as the source. The USH-508SA specifies a 4 mm cold arc gap and a defined lamp-house position requirement (vertical within tolerance). If a lamp is installed outside its specified orientation window, arc behavior and UV delivery can change, and life can shorten.

Operating Snapshot (from Ushio spec sheet)
Power control: Constant Power Control
Current ripple: P-P, %MAX 3
Trigger voltage: Min 4 kV DC
Supply voltage: Min 120 V
Lamp house position: Vertical ±15°
Base temp: 200°C MAX
Bulb temp: 650–750°C
Cooling: Necessary
Lamp current: 13 A (MAX)
Disclaimer: Product and application information is provided for general guidance. Always verify compatibility, ignition requirements, orientation, and safety procedures using your equipment documentation and internal standards. Mercury-containing lamps require proper handling and disposal per applicable regulations. Ushio® is a trademark of its respective owner; SOSCleanroom is not affiliated with or endorsed by the manufacturer.