Black Box virtalähde (DIN-kiskokiinnitys mahdollinen)

Industrial automation engineers and panel builders often need a reliable power source that fits directly onto a DIN rail without taking up extra space. The Black Box SDR-120-48 delivers clean, regulated 48V DC output at up to 120W from a universal AC input, making it a solid choice for control cabinets, machine builders, and factory floor installations. Its slim metal housing and fanless design mean it runs quietly and can be mounted side-by-side with other DIN rail modules.

Key specifications

• Output voltage: 48V DC (adjustable 44-52V)
• Output current: 2.5A
• Output power: 120W
• Input voltage: 100-240V AC (universal)
• Input frequency: 50/60 Hz
• Efficiency: >90%
• Ripple & noise: <100mVp-p
• Hold-up time: >20ms at full load, 115VAC
• Protection: overload, overvoltage, short circuit, overtemperature
• Operating temperature: -20°C to +70°C (with derating)
• Cooling: convection (fanless)
• Enclosure: metal (aluminium/steel)
• Mounting: DIN rail TS-35/7.5 or TS-35/15
• Connectors: screw terminals (input and output)
• Status indicator: LED (DC OK)
• MTBF: >500,000 hours (MIL-HDBK-217F)
• Certifications: CE, UL 508, RoHS
• IP rating: IP20

Why choose it

This power supply is built for demanding industrial environments. The wide input range handles voltage fluctuations, while the high efficiency reduces heat generation and energy costs. The adjustable output lets you fine-tune the voltage for your specific load, and the comprehensive protection features safeguard both the supply and connected equipment. The compact metal case is rugged yet lightweight, and the fanless design eliminates dust ingress and mechanical wear.

Ideal use cases

• Powering sensors, actuators, and controllers in automation systems
• Providing DC power for DIN rail mounted devices in control cabinets
• Machine building and retrofitting projects requiring reliable 48V DC
• Building automation and HVAC control panels
• Test and measurement equipment racks

Good to know

The SDR-120-48 is part of Black Box's industrial power supply line, known for consistent performance and long service life. It operates within a wide temperature range, but derating may be necessary above 50°C. Installation is straightforward: snap it onto a standard DIN rail and connect wires to the screw terminals. Always ensure proper ventilation and follow local electrical codes.