OSRAM HNS 4 W G5 (PURITEC) - Germicidal UV-C lamp 254 nm (OFR) for disinfection of air, water and surfaces

OSRAM HNS 4 W G5 (PURITEC) - Germicidal UV-C lamp 254 nm (OFR) for disinfection of air, water and surfaces

The OSRAM PURITEC HNS 4 W G5 is a low-pressure linear UV-C lamp with a G5 base, specifically designed for effective chemical-free disinfection in air, water treatment, and surface sanitization systems. It emits germicidal radiation with a dominant wavelength of 254 nm in its OFR (ozone-free) version, preventing ozone generation and facilitating safe integration into enclosed equipment. Thanks to its low mercury content and special tube coating , it maintains stable UV-C output throughout its rated lifespan of 6,000 hours .

With a power consumption of 4 W , a nominal voltage of 29 V , and a current of 0.17 A , this lamp offers a UV-C radiated power of 0.9 W (200–280 nm) , suitable for achieving germicidal doses in compact units. Its T5 format (Ø 16 mm) and 136 mm length allow for smaller designs, and the "Any" operating position simplifies mounting in various orientations when required. It is non-dimmable and must always be operated with a compatible electronic ballast .

Main features

• UV-C 254 nm (OFR): Effective disinfection of air, water and surfaces without ozone generation.
• Stability and durability: specific coating that extends the lifespan up to 6,000 h with almost constant UV-C output.
• Compact format: T5 tube, Ø 16 mm and 136 mm in length for small equipment.
• Germicidal efficiency: UV-C radiated power of 0.9 W (200–280 nm) with low power consumption.
• Simple integration: standard G5 base and “Any” working position; operation with electronic ballast.
• Sustainability and safety: low mercury content and ozone-free construction.

Product benefits

• Chemical-free and residue-free disinfection , suitable for environments where strict hygiene is required.
• Operating cost contained by its low power and predictable maintenance (6,000 h).
• Mechanical compatibility with G5 systems and T5 dimensions widely used in the industry.
• Operational safety by preventing ozone formation (OFR), reducing after-treatment requirements.

Use cases

• Air purification in HVAC ducts, recirculation in enclosed rooms and stand-alone units.
• Water treatment in compact equipment (pretreatments, tanks, small flow rates).
• Disinfection of surfaces in closed chambers, conveyor belts and specific industrial equipment.

Frequently Asked Questions

• Does it produce ozone? No. The OFR version uses special glass that blocks ozone-generating wavelengths, so it is ozone-free .
• Is it dimmable? No. These UV-C lamps are not dimmable ; they must operate at the manufacturer's specified settings.
• Why does “luminous intensity (cd)” appear if the lamp is UV-C? It is a standard field on some data sheets; the relevant quantity here is the UV-C radiated power (0.9 W) , not the visible luminous flux.
• Which ballast to use? An electronic ballast suitable for 4–16 W and a 7 mm lamp outlet must be used; a common option is OSRAM QUICKTRONIC QT-ECO 1×4–16/220–240 S (check equipment compatibility).
• Safety requirements? Use only in enclosed housings designed for UV-C; avoid direct or reflected exposure to skin and eyes.

Installation and safety

• Install only in enclosed equipment with materials suitable for UV-C and adequate ventilation.
• Connect to an electronic ballast according to specifications; do not operate directly to the mains.
• Avoid touching the tube with your hands; clean it with a lint-free cloth to maintain UV transmission.
• This lamp contains mercury . At the end of its useful life, dispose of it according to local WEEE regulations/environmental guidelines.

Project description

OSRAM PURITEC HNS 4 W G5 UV-C lamp; G5 base; 29 V voltage; 0.17 A current; 4 W power; 0.9 W UV-C radiated power (200–280 nm) ; 254 nm dominant wavelength (OFR, ozone free); Ø 16 mm; 136 mm length; 6,000 h lifetime; working position: Any ; non-dimmable; operation with electronic ballast for 4–16 W.