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Schneider Electric LR3D3555
Thermal overload relay, 30...40A, class 20
Product Description
The thermal overload relay LR3D3555 is designed for integration with TeSys D contactors, providing essential protection for motors, particularly under unbalanced load conditions. With a thermal setting range of 30-40A, it effectively safeguards motors rated at 18.5kW at 400V.
This device features manual test and reset buttons, an automatic reset function, and a trip auxiliary contact alongside a flag indicator for clear operational status. Its compact dimensions (75mm width and 121mm depth) facilitate direct mounting on the bottom terminals of TeSys contactors such as LC1D80 and LC1D95, forming a streamlined starter solution.
Constructed for durability, the relay is temperature compensated to ensure accurate protection performance within an ambient temperature range of -20 to 60 °C. It is compliant with multiple international standards including IEC, UL, and CSA, indicating its versatility for various applications. The relay also accommodates a variety of terminal connections and allows for the addition of separate mounting terminal blocks and remote control devices.
Furthermore, it is classified under the Green Premium product range, ensuring it meets environmental sustainability standards as it is free from substances of very high concern and complies with RoHS regulations.
Offer details
- Best offer from:
Trusted Automa.Net Supplier- Availability:
- 1 pc.On RequestUpdated at: 06-08-2026
- Condition:
- New Surplus
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Specifications
- Brand
- Schneider Electric
- Product Certifications
- IEC || UL || CSA || CCC || EAC || BV || DNV-GL || LROS (Lloyds register of shipping) || UKCA
- Mechanical Robustness
- vibrations6 Gn IEC 60068-2-6 || shocks15 Gn for 11 ms IEC 60068-2-7
- Standards
- EN/IEC 60947-4-1 || EN/IEC 60947-5-1 || UL 60947-4-1 || UL 60947-5-1 || CSA C22.2 No 60947-4-1 || CSA C22.2 No 60947-5-1 || GB/T 14048.4 || GB/T 14048.5
- Climatic Withstand
- IACS E10
- Ambient Air Temperature For Operation
- -20-60 °C without derating IEC 60947-4-1
- Dielectric Strength
- 1.89 kV 50 Hz IEC 60947-1
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Documents
Data Sheet
Datasheet for Schneider Electric LR3D3555, including specifications and features.
TracePartsCAD Models
3D CAD model and technical drawings, ready for your design software.
Compatible Products
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Additional Information
This thermal overload relay serves as a critical component for protecting motors against overload conditions. With its specified thermal adjustment range of 30-40A and adherence to class 20 standards, it is suitable for various industrial applications, providing reliable performance in motor protection systems. Its compatibility with TeSys D contactors enhances its utility in automation setups, making it a vital choice for engineers looking for robust overload protection solutions.
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