MEAN WELL RS-15-3.3 AC/DC Power Supply 15W 3.3V 4.5A Enclosed Metal Frame Single Output

Industrial automation engineers and electronics hobbyists often need a compact, reliable DC source for low-voltage logic circuits, sensors, or LED strips. The MEAN WELL RS-15-3.3 delivers a stable 3.3 V DC at up to 4.5 A from any universal AC mains input, making it a practical choice for control panels, test benches, and embedded systems where space and budget are tight.

Key specifications

• Output: 3.3 V DC, 4.5 A, 15 W maximum
• Input: 85–264 V AC, 47–63 Hz (0.35 A at 115 V AC, 0.25 A at 230 V AC)
• Efficiency: up to 78%
• Protection: overload, overvoltage, short circuit, over temperature
• Enclosure: ventilated metal frame, chassis mount
• Operating temperature: -20 °C to +70 °C (derating above 50 °C)
• Safety: UL, cUL, TUV, CE approved
• Isolation: 3000 V AC input/output
• Ripple & noise: 80 mVp-p max
• Cooling: free air convection, no fan

Why choose it

The RS-15 series is known for its long service life and robust design. With a universal input range and full international safety certifications, this power supply can be integrated into equipment sold worldwide without additional compliance headaches. Its metal case provides effective heat dissipation and mechanical protection, while the compact footprint (62.5 × 51 × 28 mm) fits easily into tight spaces.

Ideal use cases

• Powering microcontrollers, PLCs, and industrial sensors
• Driving 3.3 V LED lighting or small motors
• Bench testing and prototyping of low-voltage electronics
• Building automation and access control systems
• Retrofit projects requiring a reliable DIN-rail or chassis power source

Good to know

The RS-15-3.3 includes built-in EMI filtering and meets EN 55032 Class B emissions. It operates at full load up to 50 °C ambient; above that, derate linearly to 60% load at 70 °C. Screw terminals accept wires up to 2.5 mm². For applications needing adjustable output, consider the RS-15 series with trim potentiometer (this model is fixed 3.3 V).