OSRAM HBO 202 W/4 - Reflectorless Short Arc Mercury Lamp (≈200 W), SFc10-4 Base for Microscopy and UV Curing
The OSRAM HBO 202 W/4 (also referred to as HBO 200 W/4 in manufacturer documentation) is a reflectorless short-arc mercury lamp designed for fluorescence microscopy , UV curing , and light-guided equipment . It provides a very high-radiance point source with a multi-line spectrum in the visible and ultraviolet ranges. With a rated power of 200 W and a lamp voltage of 54–67 V (approximately 57 V in typical operation), it delivers 9,500 lm of luminous flux, 950 cd of intensity, and 33,000 cd/cm² of luminance (typical initial values). Its dual-terminal construction with an SFc10⁻⁴ base and a mounting length of 102.0 mm facilitates integration into scientific and industrial equipment. Reference rated life: 200 h . Operates exclusively in enclosed housings and with suitable power supplies.
Main features
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Type: Short arc mercury discharge lamp (HBO), double terminal, reflectorless.
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Power / Voltage / Current: 200 W · 54…67 V (≈57 V typical) · 3.0…3.7 A (AC).
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Base: SFc10-4 (double-ended).
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Initial photometry (typical): flux 9,500 lm · intensity 950 cd · luminance 33,000 cd/cm² .
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Spectrum: multi-line with high radiated power in UV and visible.
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Dimensions: diameter 17.0 mm · mounting length 102.0 mm .
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Combustion position: s45 (according to the commercial specification of model 202 W/4).
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Nominal life: 200 h.
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Applications: fluorescence microscopy, UV curing, light guide illumination.
Product benefits
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Extremely high radiance with point source for efficient optical couplings and precise lighting patterns.
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High radiated power in UV and visible light, suitable for UV curing and excitation of fluorophores.
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Stable arc that promotes the repeatability of measurements and processes.
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Standard SFc10-4 format with standardized lengths that facilitate replacement in compatible luminaires and equipment.
Use cases
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Fluorescence microscopy: stable excitation on optical benches and research microscopes.
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UV curing: photopolymerization systems and laboratory/production processes.
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Light guides: fiber optic illuminators for medicine and analysis.
Frequently Asked Questions
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Can it be dimmed? Not recommended; these lamps require power according to the technical data sheet and are operated at nominal power.
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What is the difference between the 200 W/4 and the 202 W/4? The 202 W/4 model is a variant of the 200 W/4 ; they share the same base and dimensions and are specified with equivalent photometric performance. Some commercial references indicate enhanced UV emission in the 202 W/4.
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What safety precautions should be taken? Operate only in enclosed housings designed for HBO. Avoid UV exposure and be aware of high internal pressure when hot. Manage mercury-containing waste according to regulations.
Installation and safety recommendations
- Use the power supply equipment recommended by the system manufacturer (AC, 54…67 V window and 3.0…3.7 A).
- Respect the s45 position when applicable and the 102.0 mm mounting fixing.
- Avoid touching the bulb; assemble with gloves. Allow to cool before handling.
- Plan for preventive replacement at 200 h to maintain irradiance and arc stability.
Technical note / equivalencies
In OSRAM documentation, the family is listed as HBO 200 W/4 with the indicated photometric and electrical specifications. The commercial designation HBO 202 W/4 maintains compatibility (SFc10-4, Ø 17.0 mm, 102.0 mm mounting depth, 200 h) and is associated with GTIN 4050300507156 in listings and logistics data sheets.
Project description
Reflectorless short-arc mercury lamp, double terminal SFc10-4 ; rated power 200 W (designation HBO 202 W/4 ); lamp voltage 54…67 V (≈57 V typical); current 3.0…3.7 A (AC); flux 9,500 lm , intensity 950 cd , luminance 33,000 cd/cm² (typical initial values); diameter 17.0 mm ; mounting length 102.0 mm ; burn position s45 ; rated life 200 h .
