MEAN WELL SD-15A-24 15W DC-DC Converter, 24V 0.625A, 19.2-36V Input, Chassis Mount

Industrial automation engineers and system integrators often face the challenge of powering 24V control circuits from a 24V battery or DC bus that fluctuates between 19.2 and 36 volts. The MEAN WELL SD-15A-24 solves this with a compact, chassis-mountable DC-DC converter that delivers a tightly regulated 24V output at up to 15 watts. Its screw terminal connections and free-air convection cooling make installation straightforward in control panels, machinery, or field enclosures, while built-in protections guard against short circuits, overloads, and over-voltage conditions.

Key specifications

• Input voltage range: 19.2 – 36 VDC
• Output voltage: 24 VDC
• Output current: 0.625 A
• Output power: 15 W
• Efficiency: 80%
• Isolation voltage: 1500 VDC input-to-output
• Ripple & noise: 150 mVp-p
• Line regulation: ±0.5%
• Load regulation: ±1.0%
• Operating temperature: -10°C to +60°C
• Protections: short circuit, overload, over voltage
• Cooling: free air convection
• MTBF: >400,000 hours
• Certifications: UL60950-1, TUV EN60950-1, CE
• Connectors: screw terminals (input and output)

Why choose it

The SD-15A-24 stands out for its wide DC input range, which accommodates common 24V industrial power sources with significant voltage drops or surges. Its 1500 VDC isolation protects sensitive control electronics from ground loops and transient spikes. With an MTBF exceeding 400,000 hours and full compliance with international safety standards, this converter is built for long-term reliability in demanding environments. The chassis-mount design and screw terminals simplify wiring and reduce installation time compared to DIN-rail or PCB-mount alternatives.

Ideal use cases

• Powering 24V sensors, relays, and PLC I/O modules from a 24V battery system in mobile equipment.
• Isolating and regulating DC power for control circuits in industrial machinery and automation panels.
• Providing stable 24V output from fluctuating DC sources in renewable energy or transportation applications.

Good to know

The SD-15A-24 operates with free air convection, so no fan is required—this reduces noise and maintenance. Ensure adequate clearance around the unit for heat dissipation, especially when operating near the upper temperature limit. The output is factory-set and not user-adjustable, which simplifies compliance and prevents accidental misconfiguration. For applications requiring a different output voltage, MEAN WELL offers the SD-15 series in 5V, 12V, and 48V variants.