Power Supply Unit Phoenix Contact STEP3-PS/1AC/24DC/1.3/PT

The Phoenix Contact STEP3-PS/1AC/24DC/1.3/PT is a compact 30 W power supply unit designed for industrial and automation applications that require a stable 24 V DC output from a wide AC input range. Its small footprint (36 mm × 61 mm × 90 mm) and DIN-rail compatible design allow easy integration into control cabinets and switchgear. The device meets RoHS and WEEE environmental standards and offers a high MTBF of 3,100,000 hours, indicating robust long-term operation under typical industrial conditions.

Advantages

The unit delivers regulated 24 V DC power at up to 1.3 A with high efficiency in a narrow housing, saving space in panel installations. Wide input voltage compatibility (100–250 V AC, 50–60 Hz) supports international mains systems and reduces the need for additional components. The long mean time between failures (MTBF) supports continuous operation and minimizes downtime. Compliance with environmental directives ensures reduced hazardous substances and easier disposal.

Suitable for

• Industrial control panels and automation systems
• PLC and relay power supply
• Sensor and actuator power in machine tools
• Small-scale process control and instrumentation
• Laboratory benches and test setups requiring stable 24 V DC

Key specifications

• Output voltage: 24 V DC
• Output current: up to 1.3 A (nominal)
• Output power: 30 W
• Input voltage range: 100–250 V AC
• Input frequency: 50–60 Hz
• Dimensions (W × D × H): 36 mm × 61 mm × 90 mm
• MTBF: 3,100,000 hours
• Compliance: RoHS, WEEE

How to use

Mount the power supply on a standard DIN rail inside the control cabinet, ensuring adequate clearance for ventilation around the unit. Connect the AC mains input according to local electrical codes, observing correct grounding practices. Connect the 24 V DC output to the load with correct polarity and use appropriate cross-section wiring for currents up to 1.3 A. Verify output voltage under no-load and full-load conditions before connecting sensitive equipment. Perform initial functional checks after installation and secure all terminals.

Usage recommendations

Install the unit in a dry environment within the manufacturer’s specified ambient temperature range and avoid installing next to heat sources. Use protective fusing on the AC input side where required and consider additional surge protection in electrically noisy environments. Periodically inspect terminal connections and ventilation openings to maintain reliable operation.