DIN-Rail Power Supplies

Shop DIN-rail power supplies designed to provide regulated DC power inside industrial control panels and automation systems. These compact supplies are commonly used with PLCs, sensors, relays, industrial communication equipment, instrumentation and other control-circuit loads.

Compare DIN-rail power supplies by input voltage range, DC output voltage, output current, wattage, efficiency, operating temperature and available redundancy or diagnostic features. Size the power supply for both the continuous load and temporary startup demand.

How to Select a DIN-Rail Power Supply

DIN-rail power supplies provide regulated DC voltage in a compact format designed for installation alongside other control-panel components. They are widely used in industrial automation because they simplify mounting, wiring and replacement within standardized control enclosures.

Power-supply capacity should be based on the combined current required by every connected load. Allow additional capacity for startup current, temporary peak demand and planned system expansion rather than operating continuously at the edge of the supply rating.

Important Selection Factors

• Input voltage: Confirm the available AC or DC input and allowable operating range.
• Output voltage: Match the voltage required by the connected controls.
• Output current: Total the current demand of all connected loads and provide suitable reserve capacity.
• Output power: Verify the wattage available at the expected operating temperature.
• Width and rail space: Confirm that the supply fits within the available control-panel space.
• Operating temperature: Review temperature limits and any required output derating.
• Parallel or redundant operation: Critical systems may require compatible supplies and redundancy modules.
• Approvals and environment: Verify required industrial, hazardous-location or other application-specific ratings.

Replacement Checklist

• Manufacturer and complete part number
• Input voltage and frequency
• Output voltage and current
• Required wattage
• DIN-rail width and available panel space
• Terminal arrangement
• Operating temperature
• Redundancy, signaling or communication requirements