MEAN WELL RS-15-5 – 15 W Switching Power Supply, 5 V / 3 A

The MEAN WELL RS-15-5 is a compact, reliable and efficient single-output AC/DC switching power supply designed to convert mains voltage into a regulated 5 V DC output. It provides a rated output current of 3 A and a total rated output power of 15 W.

Its universal 85–264 V AC input range allows the power supply to operate in different mains systems without a manual voltage selector. The unit can also be supplied from a 120–370 V DC input source.

The RS-15-5 is housed in a perforated metal enclosure that supports efficient heat dissipation. Cooling is provided by free-air convection, eliminating the need for a fan and helping to reduce noise, maintenance requirements and the risk of mechanical failure.

⚡ Main Features

• Regulated 5 V DC output
• Rated output current: 3 A
• Rated output power: 15 W
• Universal 85–264 V AC input
• Supports 120–370 V DC input
• Adjustable output voltage: 4.75–5.5 V DC
• Fanless free-air convection cooling
• Built-in power-on LED indicator
• Overload protection
• Overvoltage protection
• Overtemperature protection
• Automatic recovery after overload or overtemperature conditions are removed
• No-load power consumption below 0.5 W
• Long-life 105°C electrolytic capacitors
• Withstands a 300 V AC surge input for 5 seconds
• Operating temperature up to +70°C
• Withstands a 5G vibration test
• 100% full-load burn-in tested
• 3-year manufacturer warranty

🔌 Electrical Specifications

Parameter	Value
Model	MEAN WELL RS-15-5
Power supply type	AC/DC switching power supply
Number of outputs	1
Rated output voltage	5 V DC
Output voltage adjustment range	4.75–5.5 V DC
Rated output current	3 A
Output current range	0–3 A
Rated output power	15 W
Ripple and noise	80 mVp-p maximum
Output voltage tolerance	±2.0%
Line regulation	±0.5%
Load regulation	±1.5%
Typical efficiency	77%
AC input voltage	85–264 V AC
DC input voltage	120–370 V DC
Input frequency	47–63 Hz
Typical AC input current	0.35 A at 115 V AC / 0.25 A at 230 V AC
Inrush current	65 A at 230 V AC, cold start
Leakage current	Less than 2 mA at 240 V AC
No-load power consumption	Less than 0.5 W

⏱ Timing Characteristics

Parameter	Value
Setup time	Approximately 1000 ms
Rise time	Approximately 30 ms
Hold-up time at 230 V AC	Approximately 70 ms
Hold-up time at 115 V AC	Approximately 12 ms

The stated timing values apply at full rated load.

🛡 Protection Functions

Overload Protection

Overload protection is activated above approximately 105% of the rated output power. The power supply enters hiccup mode and automatically returns to normal operation after the fault condition has been removed.

Overvoltage Protection

Overvoltage protection range:

• 5.75–6.75 V

When the protection is activated, the output voltage is shut down and clamped by a Zener diode.

Overtemperature Protection

If the internal temperature exceeds the permitted level, the output voltage is shut down. Normal operation is restored automatically after the temperature falls to a safe level.

🌡 Environmental Conditions

Parameter	Value
Operating temperature	–20 to +70°C
Operating humidity	20–90% RH, non-condensing
Storage temperature	–40 to +85°C
Storage humidity	10–95% RH
Temperature coefficient	±0.03%/°C from 0 to +50°C
Vibration resistance	10–500 Hz, 5G

At elevated ambient temperatures, the available output load must be reduced in accordance with the manufacturer's derating curve.

🔒 Safety and Insulation

Test circuit	Withstand voltage
Input to output	3 kV AC
Input to frame ground	2 kV AC
Output to frame ground	0.5 kV AC

The insulation resistance between the input, output and frame-ground circuits is at least 100 MΩ, measured at 500 V DC, 25°C and 70% relative humidity.

The power supply complies with applicable international safety and electromagnetic compatibility requirements, including:

• UL 62368-1
• BS EN / EN 62368-1
• AS/NZS 62368.1
• EN 55032 Class B
• EN 55035
• EN 61000-3-2 and EN 61000-3-3
• EN 61000-4 series immunity requirements

📐 Mechanical Specifications

Parameter	Value
Enclosure type	Perforated metal enclosure
Cooling method	Free-air convection
Length	62.5 mm
Width	51 mm
Height	28 mm
Weight	Approximately 0.13 kg

The compact dimensions make the power supply suitable for installation in automation equipment, control cabinets, electronic enclosures and other space-limited applications.

🔧 Terminal Assignment

Terminal	Function
AC/L	AC line input
AC/N	AC neutral input
FG	Protective frame ground
–V	Negative 5 V DC output
+V	Positive 5 V DC output

The protective earth connection and output polarity must be checked before the power supply is energized.

🧰 Typical Applications

The MEAN WELL RS-15-5 is suitable for:

• industrial automation equipment;
• microcontrollers and electronic modules;
• LED controllers and low-power LED systems;
• alarm and security systems;
• access control equipment;
• communication and data transmission equipment;
• measuring instruments;
• electronic prototypes;
• control panels;
• 5 V relays, sensors and controllers.

⚠️ Installation Notes

The power supply operates from hazardous mains voltage and should therefore be installed by a qualified person. It must be mounted so that users cannot accidentally touch the AC input terminals or other live components.

Adequate airflow must be provided around the perforated enclosure. The power supply must not be covered with heat-insulating materials. Electrical safety and electromagnetic compatibility must also be verified in the final equipment.

✅ Summary

The MEAN WELL RS-15-5 is a compact and dependable 5 V / 3 A / 15 W switching power supply. Its universal input range, adjustable output voltage, integrated protection functions, fanless cooling and compliance with international standards make it suitable for a wide variety of electronic, automation and control applications. ```