• Output Power: 15 W
• Output Voltage: 3.3 V DC (adjustable 3.0 – 3.6 V)
• Output Current: 4.5 A
• Input Voltage Range: 18 – 75 V DC (4:1 ultra-wide input range)
• Efficiency: up to 87%
• Ripple & Noise: ≤ 50 mVp-p
• Inrush Current: typ. 15 A @ 48 VDC
• No-Load Power Dissipation: No minimum load required
• Operating Temperature: −40 °C to +85 °C (derating above +60 °C)
• Cooling: fanless free air convection
• Protections: Short circuit, Overload, Over voltage, Input reverse polarity, Input under voltage protection
• Overvoltage Category: OVC II
• Isolation Voltage: 4000 V DC (Reinforced isolation) input to output
• Dimensions (H x W x D): 90 mm x 17.5 mm x 54.5 mm (1SU width)
• Weight: approx. 68 g
• Safety & EMC Certificates: IEC 62368-1, AS/NZS 62368.1, CE, EAC, BS EN/EN 55032 Class B
• LED Indicator: Power-LED indicator
• Manufacturer Warranty: 3 Years

Information on MEAN WELL DDR-15L-3.3

The MEAN WELL DDR-15L-3.3 is an ultra-compact 15 W DIN-rail DC/DC converter designed for effortless mounting on standard TS-35/7.5 or TS-35/15 rails, featuring an ultra-slim casing width of just 17.5 mm (1SU) to save critical space in control cabinets. Engineered with a wide 4:1 input voltage range of 18 to 75 V DC, it provides a stable regulated 3.3 V DC output at up to 4.5 A current. An onboard potentiometer allows users to adjust the output voltage between 3.0 V and 3.6 V to compensate for voltage drops across longer wiring distances, all while requiring no minimum load for stable operation.

Featuring a high efficiency rating of up to 87%, this converter relies entirely on fanless free air convection to operate smoothly over an extended operating temperature range of -40 °C to +85 °C. Strong electrical isolation is ensured by its 4 kV DC reinforced I/O isolation, protecting sensitive load devices from system noise and transient surges. Complete protection features are built-in, including defenses against short circuit, overload, overvoltage, input reverse polarity, and input undervoltage lockout (ON ≥ 18V, OFF ≤ 17V). Certified to IEC 62368-1 standards and backed by a 3-year manufacturer warranty, the DDR-15L-3.3 is an exceptionally reliable choice for industrial control, wireless networking, and automation systems.