Siemens SIRIUS 3RF23 Solid-State Contactor, 1-Phase, 30 A, 48-460 V AC, 24 V DC Control, Zero-Point Switching, Screw Terminals, DIN Rail 3RF2330-1AA04

In industrial switching applications, mechanical contactors suffer from wear, arcing, and limited lifespan, especially under frequent operation. The Siemens SIRIUS 3RF23 solid-state contactor solves these challenges by using thyristor technology to switch loads silently and without moving parts, ensuring millions of operations with minimal maintenance. This 1-phase unit is rated for 30 A at AC-51 and handles load voltages from 48 to 460 V AC, making it ideal for resistive loads like heaters and infrared lamps.

Who is it for

This contactor is built for control panel builders, system integrators, and maintenance engineers in industrial automation, plastics processing, packaging, and HVAC. It suits applications requiring frequent switching, long service life, and reduced electrical noise, such as temperature control in ovens, plastic injection molding, and lighting systems.

Main features

• Solid-state thyristor output with zero-point switching for reduced EMI and longer load life.
• Rated operational current of 30 A (AC-51) and load voltage range 48–460 V AC.
• Control voltage of 24 V DC for easy integration with PLCs and controllers.
• Compact DIN rail mounting with screw terminals for secure wiring.
• IP20 protection and wide operating temperature range from -25°C to +60°C.
• High insulation voltage (600 V) and impulse withstand (4 kV) for reliable isolation.

Specifications

• Brand: Siemens
• Series: SIRIUS 3RF23
• Model: 3RF2330-1AA04
• MPN: 3RF2330-1AA04
• EAN: 4011209572850
• Product type: Solid-state contactor
• Number of phases: 1
• Rated operational current (AC-51): 30 A
• Rated operational voltage: 48 - 460 V AC
• Control voltage type: DC
• Control supply voltage: 24 V DC
• Switching principle: Zero-point switching
• Connection type: Screw terminals
• Mounting type: DIN rail
• Rated insulation voltage: 600 V
• Rated impulse withstand voltage: 4 kV
• Operating frequency: 50/60 Hz
• Ambient operating temperature: -25 to +60 °C
• Protection class: IP20
• Recommended fuse for short-circuit protection: 35A gG
• Power loss at rated current: Approx. 25 W
• Semiconductor technology: Thyristor (SCR)

Tips

Always use the recommended 35A gG fuse for short-circuit protection. Ensure adequate ventilation around the device, as it dissipates approximately 25 W at full load. For resistive loads, zero-point switching minimizes inrush currents and extends heater life. Verify that the control signal is 24 V DC before wiring.