OSRAM OPTOTRONIC OT 50/220-240/10 – LED Power Supply 10.5 V DC, 50 W (Indoor, IP20)
The OSRAM OPTOTRONIC OT 50/220-240/10 power supply/transformer (also referenced in some catalogs as OT 50/230-240/10) is a 10.5 V DC constant voltage driver with up to 50 W of power, designed for OSRAM LINEARlight LED modules and strips and 10 V equivalents. It offers high efficiency (≈90%) , a power factor of 0.97 , and galvanic isolation between primary and secondary windings for safe integration into luminaires and interior lighting projects. It accepts 220–240 V AC (50/60 Hz) and even DC (0 Hz) power supplies, incorporates automatic protections (short circuit, overload, and over-temperature), and is compatible with dimming via the OT DIM accessory. Its compact size ( 220 × 46.2 × 43.6 mm ) and voltage drop compensation of up to 0.5 V facilitate installations with long secondary lines (up to 10 m without regulation). IP20 rating for indoor use.
Main features
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Stabilized output voltage: 10.5 V DC (max. line ripple ±0.2 V).
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Nominal power: 50 W (partial load range 0.4–50 W).
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Wide input: 220–240 V AC (50/60 Hz) and DC operation 176–264 V.
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Typical efficiency: ~90% at full load; PF: 0.97.
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Galvanic isolation: 3 kV between primary and secondary; equivalent SELV/SELV operation.
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Protections: short circuit, overload and overtemperature (automatic cut-off/reset); no-load operation allowed.
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Regulation: possible with OT DIM controller (OSRAM system 1–10 V interface).
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Secondary wiring length: up to 10 m (2.5 mm² solid conductors) without regulation; up to 7 m with OT DIM .
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Voltage drop compensation: up to 0.5V for remote mounting.
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EMC and safety standards: EN 55015, EN 61000-3-2, EN 61547, EN 61347-2-2.
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Protection rating: IP20 (indoor use).
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Operating temperature range: −20…+50 °C ambient.
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Geometry: 220 × 46.2 × 43.6 mm; distance between fixing holes: 180 mm.
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Connections and cable sections: primary H03VV-F 2×0.50 / 2×0.75; H05VV-F 2×0.75; NYM 3×1.5; secondary H03VV-F 2×0.75; H05VV-F 2×0.75 / 2×1.00 / 2×1.5 / 2×2.5 (screw terminals, 3 pairs).
Product benefits
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Stable 10.5V power supply that protects the lifespan of 10V LED modules and strips.
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Flexible installation thanks to its compact format, standard fixing holes (180 mm) and long secondary wiring.
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Safety and reliability with automatic protections and galvanic isolation between primary and secondary.
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High energy efficiency and high power factor for optimized electrical panels.
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Compatibility with 1–10 V regulation via OSRAM OT DIM when light level control is required.
Use cases
- Interior linear lighting with LINEARlight and 10V LINEARlight Flex.
- Lighting for furniture, cornices, recesses and display cases.
- Interior signs and signage with 10V DC LED modules.
- Backlighting and interior architectural projects where a 10.5V CV power supply is required.
Frequently Asked Questions
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Is it dimmable? Yes, using the OSRAM OT DIM accessory (1–10 V interface). The driver itself does not regulate without this control.
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Is it suitable for 12V LED strips? No. This model delivers 10.5V DC. For 12V strips, use a dedicated 12V power supply.
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Can I power it with direct current? Yes, it supports DC operation within 176–264 V.
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What is the maximum cable length I can use on the secondary side? Up to 10 m (2.5 mm²) without regulation; up to 7 m with OT DIM .
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Is it suitable for outdoor use? No. IP20 protection rating, for indoor use.
Installation and safety
Independent mounting via the fixing holes (180 mm). Allows line passage on the primary side. Use the specified conductor sizes and observe polarities on the secondary side. Integrated voltage drop compensation (down to 0.5 V) helps maintain 10.5 V at the load when the driver is installed remotely. Compliant with EMC and safety standards EN 55015, EN 61000-3-2, EN 61547, and EN 61347-2-2.
Project description
CV driver for LED 10.5 V DC, 50 W; input 220–240 V AC (50/60 Hz) and DC 176–264 V; efficiency ≈90%; PF 0.97; line ripple ±0.2 V; load 0.4–50 W; primary-secondary isolation 3 kV; automatic protections (short circuit, overload, over-temperature) and no-load operation; dimming with OT DIM ; max. secondary cable length 10 m (7 m with dimming); voltage drop compensation 0.5 V; IP20; −20…+50 °C; dimensions 220 × 46.2 × 43.6 mm; distance between holes 180 mm; screw terminals, cable cross-sections and types according to DIN.
