3RT2025-1AB04

What type of component is this?

It is a SIRIUS 3RT2 power contactor designed for electrically switching motors and other three-phase loads in industrial control panels.

What is the rated operational current?

The contactor is rated at 17 A for AC-3 and AC-3e operation at 400 V. Its AC-3 rating is 17 A at 500 V and 13 A at 690 V.

What motor power can this contactor control?

For AC-3 motor switching, it is rated for 4 kW at 230 V, 7.5 kW at 400 V, 7.5 kW at 500 V and 11 kW at 690 V.

What coil voltage does it require?

The 3RT2025-1AB04 uses a 24 V AC control coil rated for operation at 50 Hz. The stated coil operating range is 0.8 to 1.1 times the rated control voltage.

How many main poles does the contactor have?

It has three normally open main poles, making it suitable for switching three-phase electrical loads.

What auxiliary contacts are included?

The contactor configuration includes two normally open and two normally closed instantaneous auxiliary contacts. These can be used for signalling, interlocking and control-circuit functions.

What terminal type is used?

Screw-type terminals are provided for the main circuit, auxiliary circuit, control circuit and magnet coil.

What are the unit's dimensions?

The unit measures approximately 85 mm high, 45 mm wide and 141 mm deep. It is classified as Siemens size S0.

How is the contactor mounted?

It can be secured by screws or snapped onto a 35 mm DIN rail conforming to DIN EN 60715. Side-by-side installation is permitted with no lateral spacing between adjacent units, subject to the specified clearances around live and earthed parts.

What is the enclosure protection rating?

The front and terminals are rated IP20. The front is finger-safe when the device is installed in the specified vertical orientation.

What ambient temperatures can it operate in?

The specified operating temperature range is -25°C to +60°C. The storage temperature range is -55°C to +80°C, and the maximum stated installation altitude is 2,000 metres above sea level.

What conductor sizes can be connected to the main terminals?

The main terminals accept solid or stranded conductors from 1 to 10 mm². Depending on conductor construction and end preparation, two conductors per terminal may also be accommodated within the specified ranges.

What conductor sizes can be connected to the auxiliary terminals?

The auxiliary terminals accept solid, stranded or finely stranded conductors from 0.5 to 2.5 mm², subject to the permitted terminal combinations.

What is the typical mechanical operating life?

The contactor has a typical mechanical life of 10 million operating cycles. Actual service life will vary with the electrical load, switching category, switching frequency and operating conditions.

How frequently can the contactor switch?

The maximum stated operating frequency is 1,000 operations per hour for AC-1, AC-2, AC-3 and AC-3e duties, and 300 operations per hour for AC-4 duty. The no-load switching frequency is up to 5,000 operations per hour.

What is the rated insulation voltage?

The main and auxiliary circuits have a rated insulation voltage of 690 V at pollution degree 3. The rated impulse withstand voltage is 6 kV.

Is this contactor suitable for reversing or star-delta motor circuits?

It can be used as a switching element within reversing and star-delta arrangements when combined with correctly selected contactors, interlocks, overload protection and control components. The complete circuit must be designed for the motor rating and application.

Does the contactor provide motor overload protection?

No. This device performs the switching function and should be paired with a correctly rated overload relay or other appropriate motor protection equipment where required.