Some members of the family of mid-power LEDs Osram Duris were introduced to you a year ago in the article A light without an end with OSRAM Duris E3 and E5 LEDs. So far, these basic series were available:
Duris E3 – white LEDs LED 3×1.4 mm with a max. current of 30 mA in a cost-effective plastic package. Suitable for general usage in lighting, mainly at construction of replacements of classic light sources (retrofits)
Duris E5 – white LEDs 5.6×3 mm with a max. current of 180 mA in a cost-effective plastic package. Suitable for general usage in lighting, mainly at construction of replacements of classic light sources (retrofits)
Duris P5 – white LEDs 2.6×2.2 mm with a max current of 200mA in a resistant ceramic package. Handles high temperatures, extremely resistant to corrosion, long lifetime. Suitable for professional usage in lighting, mainly at construction of powerful light sources with a long lifetime.
The latest increase of the Duris family is the S5 series, which so to say merges the best of the E5 and P5 series. In other words Duris S5 represents a “golden middle way” between E5 and P5 and brings an excellent economical effectivity (low price), high light output and a very good lifetime. S5 is produced in a small epoxy-based package (3x3mm) with very good thermal properties. what enabled to increase power of this series.
Duris S5 also brings another valuable feature – high flexibility, because a pinout is the same as in several competition products and mainly – Duris S5 – thiase are three different types available in the same package::
Notice the double voltage at the type PSLPS1, what indicates, that inside it contains 2 LEDs connected in series and at the same time it mains practically double power in comparison to type MS1. Features of particular types are best illustrated in an attached table. It´s also worth to notice the value „binning current“ and also columns „Typ. flux“ and „Typ. efficacy“, which display measured values at a given testing current. High efficacy up to 125lm/W at the type MS1 is reached at current of 65mA and serves mainly as a reference value for comparison with other LEDs from other producers, which are often tested just at such lower currents (even though in fact the type MS1 can handle up to 240 mA). In general it applies to all white LEDs, that they reach a higher efficacy at lower than maximum currents, mainly thanks to a lower chip temperature.
For more detail: Duris S5 – the best of the Osram Duris white LEDs family
