MEAN WELL RS-25-12 25.2W 12V 2.1A Enclosed Switching Power Supply, 85-264VAC Input, Metal Case

Industrial and automation projects often demand a power source that is both compact and highly reliable. The MEAN WELL RS-25-12 answers that need by delivering a stable 12V DC output at up to 2.1A from a wide range of AC inputs, all within a rugged metal enclosure that fits easily into tight spaces.

Who is it for

This power supply is ideal for engineers, system integrators, and technicians working on LED lighting, industrial controls, security systems, or any application requiring a dependable 12V rail. It is equally suited for prototyping and small-scale production where space and budget matter.

Main features

• Universal AC input: 85–264 VAC (120–370 VDC), with 47–63 Hz frequency range, for global compatibility.
• Compact metal case with chassis mount design for easy integration and heat dissipation.
• Built-in protections: short circuit, overload, and over voltage ensure safe operation under fault conditions.
• Free air convection cooling – no fan, no noise, no maintenance.
• High efficiency up to 83% reduces energy waste and heat generation.
• Complies with UL60950-1, TUV EN60950-1, CB, and CE safety standards.
• Low ripple and noise: 120mVp-p maximum for clean power delivery.
• Wide operating temperature range: -20°C to +70°C, with derating above 50°C.

Specifications

• Output voltage: 12V DC (fixed)
• Output current: 2.1A
• Output power: 25.2W
• Input voltage: 85–264 VAC / 120–370 VDC
• Input frequency: 47–63 Hz
• Efficiency: 83%
• Ripple & noise: 120mVp-p max
• Setup, rise time: 500ms, 20ms at full load (115VAC)
• Hold up time: 80ms at full load (115VAC)
• Isolation voltage: I/P-O/P: 3kVAC, I/P-FG: 1.5kVAC, O/P-FG: 0.5kVAC
• MTBF: >700,000 hrs (MIL-HDBK-217F, 25°C)
• Operating temperature: -20°C to +70°C
• Storage temperature: -40°C to +85°C
• Cooling: Free air convection
• Housing material: Metal case
• Mounting: Chassis mount
• Safety standards: UL60950-1, TUV EN60950-1, CB, CE
• Dimensions (L x W x H): 79 x 51 x 28 mm
• Weight: 0.2 kg

Tips

To ensure long-term reliability, provide adequate ventilation around the unit and avoid blocking the ventilation holes. For full power operation above 50°C ambient, derate the output by 2.5% per °C up to 70°C. When connecting the output, use wires rated for at least 2.1A and keep the length as short as possible to minimize voltage drop.