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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT1075-6NB36 |
| Alternative Part Number | 3RT10756NB36 |
| Manufacturer | Siemens |
| Product Type | Power Contactor |
| Size | S12 |
| Protection Class IP (Front) | IP00 (IP20 with cover/box terminal) |
| Degree of Pollution | 3 |
| Installation Altitude | Up to 2,000 metres above sea level |
| Ambient Operating Temperature | -25°C to +60°C |
| Mechanical Operating Cycles | 10,000,000 (5,000,000 with electronics-compatible auxiliary switch block) |
| Main Circuit Contact Configuration | 3 NO contacts for main contacts |
| Operational Current (AC-3, 400 V) | 400 A |
| Operational Current (AC-1, 400 V) | 430 A at 40°C, 400 A at 60°C |
| Control Supply Voltage (DC) | 21 to 27.3 V |
| PLC-Control Input Type | Type 2 according to IEC 60947-1 |
| Consumed Current at PLC-Control | Maximum 20 mA |
| Voltage at PLC-Control Input | 24 V |
| Operating Range Factor (Voltage) | 0.8 to 1.1 |
| Surge Suppressor Design | With varistor |
| Apparent Pick-Up Power (AC, 50 Hz) | 750 VA |
| Closing Power of Magnet Coil (DC) | 800 W |
| Holding Power of Magnet Coil (DC) | 3.6 W |
| Closing Delay | 60 to 90 ms |
| Opening Delay | 80 to 100 ms |
| Arcing Time | 10 to 15 ms |
| Auxiliary Circuit Contact Type | 2 NC instantaneous contacts, 2 NO instantaneous contacts |
| Operating Current at AC-12 | Maximum 10 A |
| Mounting Type | Screw fixing |
| Side-by-Side Mounting | Yes |
| Dimensions (H x W x D) | 214 mm x 160 mm x 225 mm |
| Required Spacing | Forwards: 20 mm, Upwards: 10 mm, Downwards: 10 mm, At the side: 0 mm (10 mm for live parts) |
| Connection Bar Width | 25 mm |
| Connection Bar Thickness | 6 mm |
| Hole Diameter | 11 mm |
| Number of Holes | 1 |
| Electrical Connection Type | Connection bar for main circuit, screw-type terminals for auxiliary/control circuit |
| Conductor Cross-Section (Main) | Stranded: 70 to 240 mm² |
| Conductor Cross-Section (Auxiliary) | Solid or stranded: 0.5 to 4 mm², Finely stranded with core end processing: 0.5 to 2.5 mm² |
| Safety-Related Data | Mirror contact according to IEC 60947-4-1, B10 value: 1,000,000 |
| Protection Class IP (Front) | IP00; IP20 with box terminal/cover |
| Touch Protection | Finger-safe for vertical contact from the front with box terminal/cover |
| Suitability for Use | Safety-related switching OFF |
| Certificates/Approvals | General Product Approval, EMC, Type Examination Certificate |
The Siemens 3RT1075-6NB36 power contactor is a robust and reliable switching device designed to handle high power circuits, making it an essential component for industrial applications. This contactor is engineered to control motors and loads efficiently within AC-3 400 A and 200 kW at 400 V, ensuring smooth operation in demanding environments.
Crafted for versatility, the 3RT1075-6NB36 operates with both alternating current (AC) and direct current (DC), with a control supply voltage range of 21 to 27.3 V. It features an integrated electronic operating mechanism with a 24 V DC PLC interface, which facilitates seamless integration into programmable logic controller systems.
The contactor boasts a size S12 frame and is equipped with bar connections for the main circuit, alongside screw terminals for auxiliary and control circuits. It includes 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, providing flexibility for various circuit configurations.
Durability is a key attribute of the 3RT1075-6NB36, with a mechanical service life of up to 10 million operating cycles, ensuring long-term reliability and reduced maintenance needs. The device is designed with safety in mind, featuring a protection class of IP00 on the front, which can be enhanced to IP20 with the addition of a box terminal or cover.
This power contactor is suitable for a wide range of industrial applications, including manufacturing, automation, and process control, where consistent performance and endurance are paramount. Its robust construction and reliable operation make it a valuable asset for managing high-capacity electrical loads with precision and ease.
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Frequently Asked Questions
What is the size of the contactor?
The contactor is of size S12, which is a designation used by Siemens to indicate the physical and electrical capacity of the contactor.
What is the protection class of the contactor on the front?
The protection class on the front of the contactor is IP00, which means it is not protected against any ingress of solid objects or water. It is advisable to install it within a secure enclosure for protection.
Can this contactor be used in safety-related applications?
Yes, the contactor is suitable for safety-related switching OFF applications, as it features a mirror contact according to IEC 60947-4-1.
What are the operational current ratings for this contactor?
The operational current ratings for the contactor at AC-3 at 400 V are rated at 400 A. It also has different current ratings for other AC and DC applications, which can be found in the detailed specifications.
What type of connections does the contactor support?
The contactor supports a connection bar for the main current circuit and screw-type terminals for auxiliary and control circuits, as well as for the magnet coil.
What are the dimensions of the contactor?
The contactor has a height of 214 mm, a width of 160 mm, and a depth of 225 mm.
What is the mechanical service life of the contactor?
The mechanical service life of the contactor is typically 10 million operating cycles, which can vary with the addition of auxiliary switch blocks.
What is the ambient temperature range for operating this contactor?
The contactor can operate within an ambient temperature range of -25 to +60 degrees Celsius.
Is side-by-side mounting possible with this contactor?
Yes, side-by-side mounting is possible with this contactor, allowing for efficient use of space within control cabinets.
What is the required spacing for side-by-side mounting?
When mounting side-by-side, a spacing of 20 mm forwards, 10 mm upwards, and 10 mm downwards is required. There is no additional spacing required at the side.
