USHIO USH-103D / USH-102D – Genuine OEM 100W Mercury Short-Arc Lamp for Fluorescence Microscopes
This listing is for one genuine mercury short-arc lamp. Please select your variant from the dropdown menu: USHIO USH-102D (200h rated life), USHIO USH-103D (300h rated life, extended-life), or Osram HBO 103W/2 (300h rated life). All three are high-pressure mercury short-arc lamps designed as the original equipment light source for fluorescence microscope illumination systems. The USH-103D is a direct, pin-for-pin cross-reference replacement for the Osram HBO 103W/2, ensuring seamless integration into all major microscope brands including Olympus, Nikon, Zeiss, and Leica. Each lamp delivers intense spectral peaks in the UV and visible ranges—perfect for DAPI, FITC, TRITC, and other fluorophore excitation applications.
Bare bulb only – no housing or lamp house included. Mercury short-arc lamps emit harmful ultraviolet radiation, operate under high internal pressure, and require high-voltage ignition. Installation must be performed by a qualified technician. Always operate these lamps in properly designed and enclosed lamp housings. Never handle the quartz envelope with bare fingers.
Choose Your Variant
- USHIO USH-102D (200h): 100W, 20V, 5A DC. Ozone-free quartz burner. 3000 lumens. 200-hour rated life. Ushio item code 5000273. Ideal for standard fluorescence microscopy applications.
- USHIO USH-103D (300h): 100W, 20V, 5A DC. Extended-life design. 3000 lumens. 300-hour rated life. Ushio item code 5001329. Enhanced electrode design for superior arc stability and longer service intervals. Direct cross-reference replacement for Osram HBO 103W/2.
- Osram HBO 103W/2 (300h): 103W, 17–25V, 4.0–5.0A DC. 2550 lumens. 300-hour rated life. Osram item code 69182. The original equipment lamp for many European microscope systems.
Compatible Microscope Systems & Lamp Housings
These 100W mercury short-arc lamps fit all fluorescence microscope illuminators and lamp housings designed for HBO 100W/2 or HBO 103W/2 type lamps with SFa7.5-2 (anode) and SFa9-2 (cathode) bases.
| Brand | Compatible Microscopes & Lamp Housings |
|---|---|
| Olympus | BX40, BX41, BX51, BX61, IX51, IX71, IX81, SZX7, SZX10, SZX16, BH2-RFL, BHRFL, IMT2-RFL, and all Olympus 100W mercury lamp housings (8-B1920) |
| Nikon | Labophot, Optiphot, Diaphot, Eclipse series with Nikon LH-M100CB-1 lamp housing, and all Nikon 100W mercury illuminators |
| Zeiss | Axiolab, Axioplan, Axiophot, Axioskop, Axiovert, and all Zeiss 100W HBO lamp housings (SFa7.5-2/SFa9-2 compatible) |
| Leica / Leitz | DMLB, DMRA, DMRB, Leitz LH100Z, Leitz LH102Z, and all Leica 100W mercury fluorescence illuminators |
Compatibility Notes: The microscope systems listed above are verified through USHIO’s official product documentation, authorized distributor cross-reference data, and Osram’s published HBO 103W/2 compatibility list. The USH-103D (5001329) is confirmed as a direct replacement for Osram HBO 103W/2 (69182) and Olympus part number 8-B1920. These lamps are designed for all 100W fluorescence microscope systems using the industry-standard SFa7.5-2/SFa9-2 double-ended base configuration. If your microscope system is not listed above, verify your lamp housing specifications or contact us with your microscope model and original lamp details—we will confirm compatibility at no charge.
Technical Specifications Comparison
| Specification | USHIO USH-102D | USHIO USH-103D | Osram HBO 103W/2 |
|---|---|---|---|
| Wattage | 100W | 100W | 103W |
| Voltage | 20V | 20V | 17–25V |
| Current | 5.0A DC | 5.0A DC | 4.0–5.0A DC |
| Luminous Flux | 3000 lm | 3000 lm | 2550 lm |
| Color Temperature | ~6000K | ~6000K | ~6000K |
| Color Rendering | Ra > 95 | Ra > 95 | Ra > 95 |
| Rated Life | 200 hours | 300 hours | 300 hours |
| Base (Anode) | SFa9-2 | SFa9-2 | SFa9-2 |
| Base (Cathode) | SFa7.5-2 | SFa7.5-2 | SFa7.5-2 |
| Diameter | 10 mm | 10 mm | 10 mm |
| Overall Length | 90 mm | 90 mm | 90 mm |
| LCL (Light Center Length) | 43 mm | 43 mm | 43 mm |
| Arc Gap | 0.5 mm | 0.5 mm | 0.5 mm |
| Burn Position | Vertical ±15° | Vertical | s90 (anode down) |
| Ozone | Ozone-free (OFR) | Ozone-free (OFR) | Standard |
| Item Code | 5000273 | 5001329 | 69182 |
| Manufacturer | USHIO Inc. (Japan) | USHIO Inc. (Japan) | Osram GmbH (Germany) |
| Condition | Brand new, genuine OEM. 100% original, never re-lamped. | ||
Peak Spectral Lines & Fluorescence Applications
USHIO 100W mercury short-arc lamps provide intense spectral peaks at 365nm, 405nm, and 436nm—the three primary UV/visible wavelengths required for fluorescence excitation. Common fluorophore compatibility includes DAPI (365nm), Hoechst (365nm), FITC (436nm), GFP (405/436nm), TRITC (436nm), and many others. The point-source arc design allows efficient light collection and uniform illumination across the microscope field of view.
Genuine USHIO – 100% Original, Never Re-Lamped
This is a brand-new, original USHIO mercury short-arc lamp—not a used bulb that has been re-lamped or refurbished. Every lamp we sell is manufactured by USHIO in Japan or Osram in Germany as a complete, sealed unit. No recycled parts, no re-lamped cores. Using a genuine OEM lamp ensures precise arc alignment, stable spectral output, and full rated lamp life. Generic compatible bulbs and re-lamped units often suffer from arc instability, spectral drift, UV output degradation, and premature failure.
365-Day Replacement Warranty
All variants are covered by a full 365-day warranty against manufacturing defects.
Fast, Tracked Shipping
Ships promptly with tracking. Packed with extreme care in custom protective packaging to ensure safe international delivery.
Select your preferred variant from the dropdown above and restore your fluorescence microscope to full excitation intensity with a genuine USHIO or Osram mercury short-arc lamp.
