Compact multi-chip LED for interior lighting


Duris S 8

The Duris S 8 from Osram Opto Semiconductors offers lots of light from a small surface, particularly for use in directional retrofits

Osram Opto Semiconductors launches the Duris S 8, a new, multi-chip, high-power member of the Duris “S” LED series. The close grouping of the LED permits very good color consistency in combination with a high luminous flux. The new Duris S is primarily used in directional and omnidirectional retrofits, as well as in LED spots in indoor lighting. It is particularly suitable for directional lighting in office and business premises, as well as in the home.

The very good color consistency (color binning) in the directional retrofits is achieved through the close grouping of the LEDs, which corresponds to the coverage of a 5-step MacAdam ellipse. 3-step MacAdam grouping is additionally available for applications requiring very good color homogeneity. The Duris S 8 is grouped by color coordinates at the junction temperature of 100 °C instead of at room temperature, as is customary. “In terms of color rendering, the Duris S 8 has a CRI of more than 80. An even higher CRI will be the next step,” says Janick Ihringer, the responsible Product Manager SSL at Osram Opto Semiconductors.

The new Duris S also emits a great deal of light from a small surface, permitting efficient optical solutions. It measures just 5.8 x 5.2 mm and is available in two versions – with six or eight chips. Thanks to the luminous flux of 500 lm at 200 mA, a directional retrofit is possible even with the 8-chip version. “Compact, low-cost driver modules are available on the market for the forward voltage between 20 and 30 V. Moreover, their technical characteristics, such as a longer service life of 25,000 hours or operating temperatures of 110 °C, are perfectly tailored to the target applications,” continues Ihringer.

The Duris S 8 can also reduce the system costs of lighting systems: The Duris S package consists of an innovative plastic housing material that is not only particularly resistant to ageing at high temperatures and in short-wave light, but also costs less than the ceramic housings frequently used.

Technical data of the Duris S 8:    
Types Version 1 (6 chips)
Version 2 (8 chips)
Housing size 5.8 mm x 5.2 mm 5.8 mm x 5.2 mm
Grouping current 200 mA 200 mA
Forward voltage 18.6 – 22.2 V 24.8 – 29.6 V
Luminous flux
(typical at 25 °C, 3,000 K)
390 lm 500 lm
Color temperature 2,700 K, 3,000 K and 4,000 K 2,700 K, 3,000 K and 4,000 K
Color Rendering Index (CRI) > 80 > 80


OSRAM, with its headquarters in Munich, is one of the two leading lighting manufacturers in the world. Its subsidiary, OSRAM Opto Semiconductors GmbH in Regensburg (Germany), offers its customers solutions based on semiconductor technology for lighting, sensor and visualization applications. Osram Opto Semiconductors has production sites in Regensburg (Germany) and Penang (Malaysia). Its headquarters for North America is in Sunnyvale (USA). Its headquarters for the Asia region is in Hong Kong. Osram Opto Semiconductors also has sales offices throughout the world. For more information go to