Switching power supply

A comprehensive range of single-phase, two-phase, and three-phase switching power supplies designed to meet the demands of a wide variety of applications.

The SW series offers single-phase, two-phase, and three-phase input power supplies up to 500W, with output currents up to 25A and power boost functionality delivering up to 150% of the rated current — providing the flexibility needed for demanding applications.

With wide input voltage ranges (115–230 Vac single-phase, 230–500 Vac two-phase, 400–500 Vac three-phase), SW series power supplies operate reliably across all continents, making them the ideal single-product solution for international electrical distribution systems.

An operating temperature range of –25°C to +70°C, combined with an ultra-compact form factor, makes the SW series perfectly suited for harsh industrial environments. DIN rail mounting and IP20 protection rating ensure easy integration and consistent performance across a wide range of enclosures and control panels.

Full compliance with IEC 60204-1 (Machinery Directive) guarantees safe, high-performance power delivery for electrical cabinets in any industrial installation.

Single-Phase, Two-Phase and Three-Phase Switching Power Supplies – SW Series

The SW series is engineered for industrial applications where reliability, ruggedness, and ease of installation are critical requirements. Its versatile range of configurations makes it suitable for a wide variety of industrial environments, from factory automation to control panels and switchgear.

Key Technical Specifications

• Output voltages: 5 V, 12 V, 24 V, 48 V DC
• Output currents:
  • Single-phase: 2 A, 3 A, 4 A, 7.5 A, 14.5 A, 25 A
  • Two-phase: 5 A, 7.5 A, 14.5 A
  • Three-phase: 25 A
• Integrated protections: three selectable modes for short-circuit and overload protection — Hiccup Mode, Fold Back, and Manual Reset
• Universal input voltage: 115/230 / 400 / 500 Vac — one product for every application
• Compact dimensions with a form factor optimized for DIN rail installation
• High efficiency: up to 93% at 50–100% of rated load
• 100% computerized testing: every unit is individually tested under real operating conditions, with results recorded on the nameplate
• Italian manufacturing since 1968
• Warranty: 2 years

Additional Technical Details

Input Voltages:

• Single-phase: 90-260 Vac
• Two-phase: 360-530 Vac
• Three-phase: 330-550 Vac

Protections and Indicators:

• Overload: indicated by flashing DC LED
• Short circuit: indicated by DC LED off
• Overvoltage protection
• AC LED: indicates mains voltage presence

Construction Features:

• Metal enclosure with quick-mount DIN rail clip
• Integrated earth connection
• Configurable negative pole grounding option
• Series or parallel connection capability (up to 4 units of the same model)

Standards and Certifications:

• CE compliance (EMC, LVD directives)
• Designed according to CSA and UL standards with certified components
• Important note: The final product does not have UL certification, but is built with components compliant with UL standards, ensuring high reliability and technical compatibility for industrial applications

Compact Dimensions

The high efficiency of semi-resonant switching technology has enabled size reduction of up to 50% compared to traditional linear power supplies, ensuring compact footprint without compromising performance or reliability.

The compact design optimizes space in electrical panels and simplifies installation in space-constrained configurations.

Manual Reset Mode

In case of fault, this mode requires disconnection of the primary power supply for approximately 1 minute followed by manual reactivation to restore output.

Particularly suited for applications where personnel safety is a priority, this function prevents automatic restart after anomalies, requiring conscious and controlled operator intervention. The system remains in a safe state until the problem is verified and resolved.

Manual Reset mode is activated by simply repositioning the internal jumper.

Key Advantages

Inventory Versatility: Single product adaptable to any input voltage (single-phase, two-phase, three-phase) and optimized for managing different output load types, reducing the need to maintain multiple stock variants.

Semi-Resonant Switching Technology: Efficiency up to 93% with continuous power delivery and capability to handle high instantaneous peaks, ensuring energy efficiency and operational reliability.

Power Good – Continuous Output Voltage Monitoring

The output voltage is constantly monitored. A normally open (NO) contact switches when voltage drops below the 20 Vdc threshold, promptly signaling the anomaly.

This “Power Good” signal enables detection of voltage drops that could compromise the operation of powered devices, allowing preventive interventions or automatic switchover to alternative power supply.

Particularly useful in redundant systems or critical applications, where continuous monitoring of power supply status ensures operational continuity and maximum system reliability.

Hiccup Mode

In case of short circuit or overload, the power supply automatically interrupts the output to protect both the device and the load.

The system attempts to restore nominal voltage approximately every 2 seconds, repeating the cycle until the fault is resolved. This active protection prevents permanent damage and allows automatic restart once the anomalous condition is eliminated.

Hiccup mode is activated or deactivated by simply changing the internal jumper position.

Continuous Output Mode

In case of short circuit or overload, the output current is maintained at maximum even when voltage drops to zero. This function is essential for powering heavy loads such as motors, solenoids, lamps, PLCs with high input capacitive loads, and devices requiring high current transients during startup.

The mode is activated by simply changing the internal jumper position, allowing the power supply to support current peaks without interrupting power delivery and preventing malfunctions or unexpected shutdowns.

Output Protected by Circuit Breakers

The output can be easily and safely isolated using magnetic-thermal circuit breakers. In case of fault, the defective section is quickly disconnected, isolating the problem and allowing critical system sections to continue operating without interruptions.

SW power supplies provide 50% additional current above nominal rating, in compliance with IEC 60204-1 standard, which requires safe control under all overload and short circuit conditions, ensuring prompt intervention of magnetic-thermal protections.

Power Boost Mode

This function enables handling current peaks up to 150% of nominal power for at least 3 minutes, allowing the use of smaller-sized power supplies for loads with high startup transients such as motors, solenoids, lamps, and capacitive loads.

Without Power Boost mode, it would be necessary to oversize the power supply based on peak current rather than the nominal load current, resulting in higher costs and larger footprint.

The mode is activated by simply changing the internal jumper position.

Datasheet and Manuals

More Info

Standard