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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT2026-2BB40 |
| Alternative Part Number | 3RT20262BB40 |
| Manufacturer | Siemens |
| Product Type | Power Contactor |
| Contact Configuration | 3 Normally Open (NO) |
| Rated Current | 40 A |
| Rated Operational Voltage | 690 V ac |
| Size of Contactor | S0 |
| Auxiliary Contacts | 1 Normally Open (NO) + 1 Normally Closed (NC) |
| Control Supply Voltage | DC 24V |
| Insulation Voltage | Rated value 690 V |
| Surge Voltage Resistance | Rated value 6 kV |
| Protection Class | IP20 |
| Ambient Operating Temperature | -25 … +60 °C |
| Installation Altitude | Up to 2,000 metres above sea level |
| Shock Resistance | At DC 10g / 5 ms, 7.5g / 10 ms |
| Frequency of Operation | At AC-3 maximum 750 1/h |
| Power Loss | At AC-3 at 400 V for rated value of the operating current per conductor 1.6 W |
| Compliance | General Product Approval, EMC, KC, Functional Safety/Safety of Machinery, Declaration of Conformity |
The Siemens 3RT2026-2BB40 is a robust power contactor designed to handle a variety of applications within industrial environments. This contactor is part of the SIRIUS product family, renowned for its reliability and efficiency. With a 3-pole configuration and an operational voltage of up to 690 V ac, it is capable of managing AC-3 loads up to 25 A and 11 kW/400 V, making it suitable for controlling motors and other heavy-duty electrical loads.
The unit features a DC control supply voltage of 24 V and includes both a normally open (NO) and a normally closed (NC) auxiliary contact, providing flexibility for integration into various control circuits. The spring-loaded terminal design ensures a secure and maintenance-friendly connection, which is particularly beneficial in applications where vibration resistance is crucial.
Constructed with safety in mind, the 3RT2026-2BB40 has a finger-safe protection class of IP20, safeguarding users from electrical shock. It also boasts a high degree of pollution resistance, with a rating of 3, and can be installed at altitudes up to 2000 meters above sea level without derating.
The contactor's mechanical service life is impressive, with up to 10 million switching cycles, indicating a long-lasting performance in demanding industrial settings. Additionally, the device is designed to withstand significant temperature variations, operating effectively in environments ranging from -25 °C to +60 °C, and can be stored in temperatures from -55 °C to +80 °C.
Overall, the Siemens 3RT2026-2BB40 is a dependable choice for engineers and technicians looking for a high-quality power contactor that offers both performance and durability.
Commonly Asked Questions
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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, similar to a relay except with higher current ratings. It is suitable for controlling electric motors and other high power loads.
Can this contactor be used for three-phase applications?
Yes, it is suitable for three-phase applications and is commonly used to control three-phase motors.
What is the rated operational voltage of this contactor?
The rated operational voltage of this contactor is up to 690 V ac.
What is the rated current for this contactor?
The rated current for this contactor is 40 A.
Does this contactor come with auxiliary contacts?
Yes, it includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contact.
What is the control voltage for this contactor?
The control voltage for this contactor is DC 24V.
What is the size of this contactor?
This contactor is of size S0, which is a standard size for this type of device.
What is the IP rating of this contactor?
The protection class IP rating on the front of this contactor is IP20.
What are the typical applications for this contactor?
Typical applications include controlling electric motors, lighting, heating, capacitor banks, thermal evaporators, and other electrical loads in industrial environments.
How can I mount this contactor?
This contactor can be mounted on a standard DIN rail or directly onto a mounting surface.
What certifications does this contactor have?
The contactor has general product approvals and meets various international standards, which can be found in the product's datasheet.
Is there a specific ambient temperature range for operating this contactor?
Yes, the contactor can operate within an ambient temperature range of -25 to +60 degrees Celsius.
