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3RF2420-1AC45
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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RF2420-1AC45 |
| Alternative Part Number | 3RF24201AC45 |
| Manufacturer | Siemens |
| Category | General Automation |
| Product Type | Solid-state contactor |
| Control Type | Three-phase controlled |
| Operating Voltage | 48 to 600 V AC at 50/60 Hz |
| Control Supply Voltage | 4 to 30 V DC |
| Operational Current | 20 A at AC-1/AC-51 at 400 V |
| Blocking Voltage | 1200 V |
| Power Loss | 66 W in hot operating state, 22 W per pole, typical 0.9 W without load current share |
| Insulation Voltage | Rated value 600 V |
| Degree of Pollution | 3 |
| Surge Voltage Resistance | Main circuit rated value 6 kV |
| Shock Resistance | According to IEC 60068-2-27 15g / 11 ms |
| Vibration Resistance | According to IEC 60068-2-6 2g |
| Reference Code | According to EN 61346-2 Q, IEC 81346-2 Q |
| Number of Poles | 3 for main current circuit |
| Number of NO Contacts | 3 for main contacts |
| Number of NC Contacts | 0 for main contacts |
| Operating Frequency | Rated value 50 ... 60 Hz, relative symmetrical tolerance of 10 % |
| Operating Range | Relative to the operating voltage at AC 40 ... 660 V at 50 Hz, 40 ... 660 V at 60 Hz |
| Dimensions (H x W x D) | 100 mm x 112 mm x 90 mm |
| Protection Class | IP20 |
| Mounting | Screw and snap-on mounting on 35 mm DIN rail |
| Connection Type | Screw connection for main current circuit |
| Terminal Screw Type | M4 for main contacts, M3 for auxiliary and control contacts |
| Tightening Torque | Main contacts: 2 … 2.5 N·m, Auxiliary and control contacts: 0.5 … 0.6 N·m |
| Stripped Length of Cable | 7 mm for main, auxiliary, and control contacts |
| Ambient Temperature | Operating: -25 ... +60 °C, Storage: -55 ... +80 °C |
| Installation Altitude | Maximum 1,000 m above sea level |
| Commodity Code | 853649 |
The Siemens 3RF2420-1AC45 is a high-quality solid-state contactor designed for seamless integration into various industrial applications. This robust component is engineered to facilitate three-phase control, ensuring reliable and efficient operation in demanding environments. With a current rating of 22 A and an operational voltage range of 48 to 600 V AC at 50/60 Hz, it is well-suited for a wide array of electrical systems.
Crafted with precision, the 3RF2420-1AC45 boasts zero-point switching functionality, which minimises electrical noise and enhances the longevity of the system by reducing stress on electrical contacts during operation. The contactor's power loss is optimised for efficiency, with a typical loss of 0.9 W without load current share, ensuring that the device operates economically.
The unit's insulation voltage is rated at 600 V, and it is built to withstand surge voltages up to 6 kV, providing a robust defence against voltage spikes. The solid-state contactor is also designed to resist mechanical stresses, certified with a shock resistance of 15g in accordance with IEC 60068-2-27 and a vibration resistance of 2g as per IEC 60068-2-6, ensuring stable performance even in environments subject to physical disturbances.
For ease of installation, the 3RF2420-1AC45 features a screw and snap-on mounting design compatible with a 35 mm standard mounting rail, allowing for quick and secure installation. The device's dimensions are compact, with a height of 100 mm, a width of 112 mm, and a depth of 90 mm, making it suitable for integration into systems where space is at a premium.
The contactor's front protection class is IP20, indicating that it is protected against solid objects larger than 12.5 mm, such as fingers, ensuring safety during operation and maintenance. The ambient operating temperature range of -25 to +60 °C and storage temperature range of -55 to +80 °C make it versatile for use in a variety of climatic conditions.
Overall, the Siemens 3RF2420-1AC45 solid-state contactor is a reliable and efficient solution for industrial applications requiring precise control and robust performance. Its design and technical specifications make it a valuable component for those seeking to enhance their electrical systems' capabilities.
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Frequently Asked Questions
What is the function of a solid-state contactor?
A solid-state contactor is designed to switch electric circuits on and off using semiconductor components. Unlike electromechanical contactors, it operates without moving parts, providing faster switching, reduced wear, and often a longer service life. It's commonly used in applications requiring high switching frequencies and precise control.
Can this solid-state contactor be used for three-phase applications?
Yes, the Siemens 3RF2420-1AC45 is specifically designed for three-phase applications, providing efficient and reliable switching for three-phase loads.
What is the maximum operating voltage for this contactor?
The maximum operating voltage for this contactor is 600 V at AC, with an operating frequency rated at 50 to 60 Hz.
What type of control voltage is required for this contactor?
This contactor requires a DC control voltage, with a range of 4 to 30 V DC to operate effectively.
What is the rated operational current of this contactor?
The rated operational current for this contactor at AC-51 is 22 A.
What are the dimensions of this solid-state contactor?
The dimensions of the contactor are 100 mm in height, 112 mm in width, and 90 mm in depth.
What type of terminals does this contactor have for wiring?
This contactor is equipped with screw terminals for secure and reliable wiring connections.
What is the IP rating of this contactor?
The contactor has an IP20 rating, indicating protection against solid objects larger than 12.5 mm but not against water.
What is the significance of zero-point switching in solid-state contactors?
Zero-point switching in solid-state contactors means that the device switches on or off at the zero voltage crossing point of the AC power cycle. This helps to minimize electrical noise and reduce stress on the contactor, leading to smoother operation and potentially longer lifespan.
Is there any specific ambient temperature range for operating this contactor?
The contactor is designed to operate within an ambient temperature range of -25 to +60 degrees Celsius, ensuring reliable performance within these temperature limits.
