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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT2028-1AG20 |
| Alternative Part Number | 3RT20281AG20 |
| Manufacturer | Siemens |
| Product Type | Power Contactor |
| Size of Contactor | S0 |
| Rated Insulation Voltage | 690 V |
| Degree of Pollution | 3 |
| Surge Voltage Resistance | 6 kV |
| Maximum Voltage for Safe Isolation | 400 V between coil and main contacts |
| Protection Class IP | IP20 for front and terminal |
| Shock Resistance | Resistant to rectangular impulse |
| Operating Power at AC-3 | 18.5 kW at 400 V |
| Thermal Short-time Current | Limited to 10 s, 304 A |
| Power Loss | 3.8 W at AC-3 at 400 V per conductor |
| No-load Switching Frequency | 5,000 1/h at AC |
| Operating Frequency | Maximum 750 1/h at AC-3 |
| Control Supply Voltage Type | AC |
| Control Supply Voltage at AC | 110 V at 50/60 Hz |
| Operating Range Factor | 0.8 to 1.1 at 50 Hz, 0.85 to 1.1 at 60 Hz |
| Apparent Pick-up Power | 81 V·A at 50 Hz, 79 V·A at 60 Hz |
| Apparent Holding Power | 10.5 V·A at 50 Hz, 8.5 V·A at 60 Hz |
| Electrical Connection Type | Screw-type terminals for main, auxiliary, and control current circuits |
| Connectable Conductor Cross-sections | Various cross-sections for main and auxiliary contacts, including solid, stranded, and finely stranded with core end processing |
| B10 Value | 1,000,000 with high demand rate according to SN 31920 |
| Failure Rate | 100 FIT with low demand rate according to SN 31920 |
| T1 Value for Proof Test Interval | 20 years according to IEC 61508 |
| Product Function | Mirror contact according to IEC 60947-4-1 |
| Commodity Code | 853649 |
The Siemens 3RT2028-1AG20 is a robust power contactor designed to handle high switching frequencies and provide reliable operation in a variety of industrial applications. This contactor is part of the SIRIUS product family, known for its durability and efficiency in controlling motors and loads.
With a size S0 footprint, the 3RT2028-1AG20 is compact yet powerful, capable of managing AC-3 category loads up to 18.5 kW at 400 V. It features a three-pole design and is equipped with screw-type terminals for both the main current circuit and auxiliary and control current circuits, ensuring secure and stable connections.
The contactor is rated for an insulation voltage of 690 V and has a surge voltage resistance of 6 kV, providing a high degree of protection against voltage spikes. It also boasts an IP20 protection class for the front and terminals, safeguarding against the ingress of solid objects.
Designed to withstand challenging environmental conditions, the 3RT2028-1AG20 operates reliably within an ambient temperature range of -25 to +60°C and can be installed at altitudes up to 2,000 meters above sea level without derating.
The mechanical service life of this contactor is impressive, with up to 10 million switching cycles, highlighting its longevity and reliability in repetitive applications. Additionally, it features a control supply voltage of AC 110 V at both 50 and 60 Hz, making it versatile for different power supply systems.
The Siemens 3RT2028-1AG20 is a testament to high-quality engineering, providing a dependable solution for controlling electric motors and ensuring smooth operation in industrial environments.
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Frequently Asked Questions
What type of contactor is this?
This is a power contactor designed for switching an electrical power circuit, typically used in applications with higher current capacities.
Can this contactor be used for high-demand applications?
Yes, it has a B10 value indicating it can handle a high demand rate, making it suitable for applications with frequent switching.
What is the rated insulation voltage for this contactor?
The rated insulation voltage for this contactor is 690 V.
What are the mounting options for this contactor?
The contactor can be mounted by screw and snap-on mounting onto a 35 mm standard mounting rail according to DIN EN 50022.
What is the control supply voltage for this contactor?
The control supply voltage at AC is rated at 110 V for both 50 Hz and 60 Hz.
What are the dimensions of this contactor?
The contactor has a height of 85 mm, a width of 45 mm, and a depth of 97 mm.
Does this contactor have auxiliary contacts?
Yes, it comes with 1 normally closed (NC) and 1 normally open (NO) auxiliary contact.
What is the operating frequency of this contactor at AC-3?
The operating frequency at AC-3 is a maximum of 750 operations per hour.
Is there a specific type of conductor cross-section that can be connected to this contactor?
Yes, the contactor can accommodate various conductor cross-sections for both main and auxiliary contacts, including solid, single or multi-stranded, and finely stranded with core end processing.
What certifications does this contactor have?
The contactor has general product approvals and may include EMC, KC, and other certifications. Specific details can be found in the product documentation.
