OPTOTRONIC OT 50W CS1400C UNV SD L CC Current Select Step-Dim Linear LED Driver (*2743YR / 79377)

Description

OPTOTRONIC OT 50W CS1400C UNV SD L CC Current Select Step-Dim Linear LED Driver (*2743YR / 79377)

OPTOTRONIC OT 50W CS1400C UNV SD L CC is a high-performance linear LED driver designed to deliver reliable and flexible power to a wide range of constant current LED lighting systems. Engineered by Osram, this versatile driver features Current Select (CS) technology, enabling tailored output current levels to match various fixture requirements—offering greater design flexibility and streamlined inventory management.

Operating from a universal input voltage range of 120-277V, the driver delivers up to 50 watts of output power and supports step-dimming (SD) functionality, making it ideal for commercial, retail, or architectural lighting applications where basic dimming control is desired. With a fixed 1400mA default current, and selectable current levels via plug-in resistor, this model helps OEMs and lighting designers achieve optimal lumen performance while maximizing energy efficiency.

Its linear form factor allows seamless integration into slim lighting fixtures, including troffers, linear pendants, and recessed luminaires. The driver also includes thermal protection, LED output short-circuit protection, and surge protection, ensuring long-term durability in demanding environments.

Backed by Osram’s trusted quality and innovation, the OT 50W CS1400C UNV SD L CC is a reliable and configurable power solution for today’s modern LED lighting needs. UL Class P listed and suitable for dry and damp locations.

General Information:

• Item Number: *2743YR (79377)
• Model Type: AA57467
• Input Voltage: 120-277VAC
• Output Power: 50W, Class 2
• Output Type: Constant Current, Current selectable

Specifications:

Ambient Operating Temperature: -40°C to 50°C
Case Temperature (Tc): 75°C, 90°C (max)
Max. Storage Temp: 70ºC
Max. Relative Humidity (%): 85% non-condensing
Transient Protection: ANSI C62.41 Cat. A 2.5kV
UL Environmental Rating: Dry & Damp
UL File number: E333135
EMI Compliance: FCC Part 15 Class A
Sound Rating: Class A

Input:

• Input Voltage (VAC): 120V-277V (+/- 10%)
• Frequency Range (Hz): 50 – 60 Hz (+/- 10%)

Output:

• Output Current (mA): 1400mA²/ 1250mA/1050mA/ 800mA/700mA
• Output Voltage (VDC): 25-51VDC³ (Power limited)
• Max. Output Power (W): 50W
• Output Ripple: <25%
• LED Power-Up Time: <1sec
• Load Regulation: <5%
• Line Regulation: <5%
• Over voltage protection: Yes, non-latching
• Over load protection: Yes, cycling required
• Output Short-Circuit Protection: Yes, non-latching
  *2 – The max output power at 1400mA operation is 47W
  *3 – The max output voltage at 1400mA operation is 33V

Dimming:

• Dimming Control Step Dim: 2 Hot wires -100%,  1 Hot wire- 50%
• Dimming Range: 50% / 100% Output current
• Dimming Type: Current Reduction

Documents:

• DataSheet