SIEMENS SIRIUS 3RT2028-1AP04 Contactor, 3-Pole, 38 A, 230 V AC Coil, 18.5 kW

The SIEMENS 3RT2028-1AP04 stands out in the SIRIUS 3RT20 series for its robust S0 frame and high switching capacity, handling up to 18.5 kW at 400 V AC-3. This 3-pole contactor is engineered for demanding motor control, offering reliable performance in industrial environments. With a 230 V AC coil and screw terminals, it integrates seamlessly into control panels and machinery, ensuring long service life and minimal maintenance.

Highlights

• Rated operational current of 38 A (AC-3, 400 V) and 60 A (AC-1, 400 V)
• Control supply voltage: 230 V AC, 50/60 Hz
• Integrated auxiliary contacts: 1 NO + 1 NC for flexible control logic
• Compact S0 size with DIN rail or screw mounting options
• High mechanical endurance of 30 million cycles and electrical endurance of 10 million cycles (AC-3)

In daily use

This contactor excels in switching three-phase motors up to 18.5 kW, making it ideal for conveyors, pumps, fans, and machine tools. The screw terminals ensure secure wiring, while the IP20 front protection guards against accidental contact. Its wide operating temperature range (-25 to +60 °C) allows deployment in harsh conditions. The built-in auxiliary contacts simplify interlocking and status feedback, reducing wiring complexity.

Full specifications

• Contactor series: SIRIUS 3RT20
• Contactor size: S0
• Number of poles: 3
• Rated operational current (AC-3, 400 V): 38 A
• Rated operational power (AC-3, 400 V): 18.5 kW
• Rated operational current (AC-1, 400 V): 60 A
• Control supply voltage: 230 V AC, 50/60 Hz
• Auxiliary contacts: 1 NO + 1 NC
• Terminal type: Screw terminals
• Mounting type: DIN rail / Screw mounting
• Operating temperature range: -25 to +60 °C
• Electrical endurance (AC-3): 10 million switching cycles
• Mechanical endurance: 30 million switching cycles
• Degree of protection: IP20 (front side)
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Power loss per pole (AC-3): 2.7 W
• Short-circuit protection: 63 A gG fuse

Final note

With proven SIRIUS reliability and a compact footprint, the 3RT2028-1AP04 is a dependable choice for efficient motor control in industrial automation.