3RT2046-3AG20

What type of device is this?

It is a Siemens SIRIUS 3RT2 power contactor designed to switch motors and other electrical loads in industrial control systems.

What is the contactor's AC-3 current rating?

The contactor is rated for 95 A at 400 V under AC-3 and AC-3e utilization categories.

What motor power can this contactor control?

Under AC-3 operation, it is rated for motors up to 45 kW at 400 V, 55 kW at 500 V, 75 kW at 690 V, and 37 kW at 1,000 V.

What control voltage does the coil require?

The coil requires a 110 V AC control supply and is suitable for both 50 Hz and 60 Hz systems.

How many main poles does the contactor have?

It has three main poles, each configured as a normally open contact for switching a three-phase load.

Are auxiliary contacts included?

Yes. The contactor includes one normally open and one normally closed instantaneous auxiliary contact.

What terminal types are used?

The main circuit uses screw terminals, while the coil, control circuit, and auxiliary contacts use spring-loaded terminals.

What is the maximum rated operating voltage?

The maximum rated operating voltage under AC-3 and AC-3e utilization categories is 1,000 V.

What is the AC-1 current rating?

The AC-1 rating is 130 A at up to 690 V and an ambient temperature of 40°C. At 60°C, the rating is reduced to 110 A.

What are the contactor's dimensions?

The S3-size contactor measures approximately 140 mm high, 70 mm wide, and 152 mm deep.

How can the contactor be mounted?

It can be secured with screws or snapped onto a 35 mm DIN rail that conforms to DIN EN 60715.

Can multiple contactors be installed side by side?

Yes. Side-by-side installation is permitted with no lateral spacing between adjacent contactors, although the specified clearances around live and grounded parts must still be maintained.

What operating temperatures can the contactor withstand?

The specified operating temperature range is -25°C to +60°C. The storage temperature range is -55°C to +80°C.

What is the maximum installation altitude?

The specified maximum installation altitude is 2,000 meters above sea level.

What is the front protection rating?

The front of the contactor is rated IP20 and is finger-safe when approached vertically from the front.

What conductor sizes can be connected to the main terminals?

Depending on conductor construction, the main terminals accept solid conductors from 2.5 to 16 mm², stranded conductors from 6 to 70 mm², and finely stranded conductors with ferrules from 2.5 to 50 mm².

What conductor sizes are accepted by the auxiliary terminals?

The auxiliary terminals generally accept solid, stranded, or finely stranded conductors from 0.5 to 2.5 mm², subject to the number of conductors and ferrule arrangement.

What is the expected mechanical operating life?

The typical mechanical service life is 10 million operating cycles under the specified operating conditions.

What are the maximum switching frequencies?

The maximum operating frequency is 900 operations per hour for AC-1, 850 per hour for AC-3 or AC-3e, and 250 per hour for AC-4.

What short-circuit protection is recommended for the main circuit?

For coordination type 1, typical options include a 250 A gG fuse or a 160 A aM fuse. For coordination type 2, typical options include a 160 A gG fuse or a 100 A aM fuse. Final selection should match the installation requirements and applicable electrical standards.

What are the North American motor ratings?

The contactor is rated at 96 A full-load current at 480 V and 77 A at 600 V. Its three-phase motor rating is 75 hp at both 460/480 V and 575/600 V.

What applications is this contactor commonly used for?

Typical applications include motor starters, pumps, compressors, fans, conveyors, machine tools, HVAC equipment, and industrial control panels requiring frequent three-phase load switching.