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3RT2023-1BF40
Siemens 3RT2023-1BF40 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 3RT2023-1BF40 is a SIRIUS 3RT2 power contactor designed for reliable switching of three-phase motors and industrial electrical loads. This compact, three-pole S0 contactor is rated at 9 A in AC-3 applications, supporting motor loads up to 4 kW at 400 V. It features a 110 V DC operating coil and integrated auxiliary contacts comprising one normally open and one normally closed contact.
Screw terminals provide secure connections for the main, auxiliary and control circuits, while the 45 mm-wide housing can be mounted onto a standard 35 mm DIN rail or secured using screws. The contactor has an IP20-rated, finger-safe front and operates in ambient temperatures from -25°C to +60°C. With a typical mechanical endurance of 10 million operating cycles, the 3RT2023-1BF40 is suitable for motor starters, control panels, machinery and automated industrial systems.
Screw terminals provide secure connections for the main, auxiliary and control circuits, while the 45 mm-wide housing can be mounted onto a standard 35 mm DIN rail or secured using screws. The contactor has an IP20-rated, finger-safe front and operates in ambient temperatures from -25°C to +60°C. With a typical mechanical endurance of 10 million operating cycles, the 3RT2023-1BF40 is suitable for motor starters, control panels, machinery and automated industrial systems.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part number | 3RT2023-1BF40 |
| Alternative part number | 3RT20231BF40 |
| Product range | SIRIUS |
| Product series | 3RT2 |
| Product type | Power contactor |
| Contactor size | S0 |
| Main poles | 3 |
| Main contacts | 3 normally open contacts |
| Utilisation category | AC-3 / AC-3e |
| Rated operational current | 9 A at 400 V AC |
| Motor power rating | 4 kW at 400 V AC |
| Additional AC-3 power ratings | 2.2 kW at 230 V; 4 kW at 500 V; 7.5 kW at 690 V |
| AC-1 operational current | 40 A at 40°C; 35 A at 60°C, up to 690 V |
| Maximum AC-3 operational voltage | 690 V |
| Rated insulation voltage | 690 V |
| Rated impulse withstand voltage | 6 kV |
| Coil voltage | 110 V DC |
| Coil operating range | 0.8–1.1 times the rated control voltage |
| Coil power consumption | 5.9 W during closing and holding |
| Closing delay | 50–170 ms |
| Opening delay | 15–18 ms |
| Integrated auxiliary contacts | 1 normally open and 1 normally closed instantaneous contact |
| Auxiliary contact rating | Up to 10 A at AC-12 |
| Auxiliary contact designation | 13–14 normally open; 21–22 normally closed |
| Main terminal designation | 1/L1–2/T1, 3/L2–4/T2 and 5/L3–6/T3 |
| Coil terminal designation | A1 positive and A2 negative |
| Terminal type | Screw terminals for main, auxiliary and control circuits |
| Main conductor capacity | 1–10 mm² solid, stranded or finely stranded conductors, subject to conductor preparation |
| Main conductor range | AWG 16–8 |
| Auxiliary conductor capacity | 0.5–2.5 mm² solid, stranded or finely stranded conductors |
| Auxiliary conductor range | AWG 20–14 |
| Mounting method | Screw fixing or snap-on mounting to a 35 mm DIN rail |
| Side-by-side mounting | Permitted |
| Mounting orientation | Rotation of ±180° on a vertical mounting surface; forward or backward tilt of ±22.5° |
| Front protection rating | IP20 |
| Touch protection | Finger-safe from the front when vertically installed |
| Width | 45 mm |
| Height | 85 mm |
| Depth | 107 mm |
| Operating temperature | -25°C to +60°C |
| Storage temperature | -55°C to +80°C |
| Maximum installation altitude | 2,000 m above sea level |
| Maximum switching frequency | 1,000 operations per hour at AC-3; 300 operations per hour at AC-4 |
| Typical mechanical endurance | 10,000,000 operating cycles |
| Reference designation | Q according to IEC 81346-2 |
| Commodity code | 853649 |
What type of component is this?
It is a Siemens SIRIUS 3RT2 power contactor designed to switch electrical loads in industrial control applications.
What is the contactor's AC-3 current rating?
The contactor has a rated AC-3 operational current of 9 A at 400 V, 500 V and 690 V.
What motor power can this contactor control?
For AC-3 motor switching, it is rated for 2.2 kW at 230 V, 4 kW at 400 V or 500 V, and 7.5 kW at 690 V.
What control voltage does the coil require?
The coil requires a nominal 110 V DC control supply. Its specified operating range is 0.8 to 1.1 times the rated coil voltage.
How many main poles does the contactor have?
It has three normally open main poles, making it suitable for switching three-phase loads.
Does the contactor include auxiliary contacts?
Yes. The 3RT2023-1BF40 includes one normally open and one normally closed instantaneous auxiliary contact for signalling, interlocking or control functions.
What terminal style is used?
Screw-type terminals are provided for the main circuit, auxiliary circuit and 110 V DC coil connections.
How is the contactor mounted?
It can be secured by screws or snapped onto a 35 mm DIN rail in a suitable control panel.
What are the dimensions of the contactor?
The unit measures approximately 45 mm wide, 85 mm high and 107 mm deep. It uses the Siemens S0 frame size.
What is the maximum rated insulation voltage?
The main and auxiliary circuits have a rated insulation voltage of 690 V, with a rated surge withstand voltage of 6 kV.
What level of ingress protection is provided?
The front and terminal areas are rated IP20. The front is finger-safe when the device is installed vertically and accessed from the front.
What operating temperature range is specified?
The specified ambient operating range is -25°C to +60°C. The storage temperature range is -55°C to +80°C.
What is the typical mechanical endurance?
The contactor has a typical mechanical endurance of 10 million operating cycles under the stated operating conditions.
What are the coil power requirements?
The 110 V DC magnet coil has a specified closing power and holding power of 5.9 W.
What is the maximum installation altitude?
The specified maximum installation altitude is 2,000 metres above sea level.
What conductor sizes can be connected to the main terminals?
The main terminals accept solid, stranded or finely stranded conductors across a nominal range of 1 to 10 mm², subject to conductor preparation and terminal configuration.
What is the AC-1 current rating?
For AC-1 utilisation, the rated operational current is 40 A at an ambient temperature of 40°C and 35 A at 60°C, up to 690 V.
What are the main terminal designations?
The incoming main terminals are 1/L1, 3/L2 and 5/L3, while the outgoing terminals are 2/T1, 4/T2 and 6/T3. The coil terminals are A1 positive and A2 negative.
- Switching three-phase motors in industrial control panels
- Controlling pumps, fans and conveyor systems
- Operating compressors and ventilation equipment
- Managing machine tool motors and auxiliary drives
- Switching resistive heating circuits and industrial heaters
- Integrating motor starters for automated machinery
- Controlling production and material-handling equipment
- Providing remote switching through a 110 V DC control circuit
- Supplying auxiliary status signals through integrated NO and NC contacts
- Installing in compact DIN rail or screw-mounted control assemblies
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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