TELEMECANIQUE LR1-D63357

Telemecanique LR1-D63357 Thermal Overload Relay Description The Telemecanique LR1-D63357 is a robust 3-pole thermal overload relay designed for reliable motor protection. This unit is part of the classic Telemecanique line, known for its durability and performance in demanding industrial environments. It provides Class 10 overload protection and is adjustable within a range of 37 to 50 amperes. This relay is engineered for direct mounting onto Telemecanique LC1-D series contactors, ensuring a compact and efficient motor starter assembly. Specifications Manufacturer: Telemecanique (now Schneider Electric) Model: LR1-D63357 Product Type: Thermal Overload Relay Number of Poles: 3 Thermal Setting Range: 37 A to 50 A Trip Class: Class 10 according to IEC 60947-4-1 Rated Insulation Voltage (Ui): 660 V AC Auxiliary Contacts: 1 NO + 1 NC Mounting Style: Direct mounting on LC1D40A, LC1D50A, LC1D65A contactors Label Info Brand: Telemecanique Type: LR1-D63357 Current Range: 38 / 44 / 50 A Approvals: IEC, VDE, BS, JEM, UL, CSA Application This relay is ideal for protecting AC motors against overloads, phase failure, and prolonged starting times. It is commonly used in industrial machinery, conveyor systems, pumps, fans, and other applications requiring dependable motor control and protection. Country of Origin Made in France. CO2 Impact Choosing this pre-owned component avoids the production of a new one, saving an estimated 20 kg of CO2. This is comparable to the emissions from driving a car for 100 kilometers. Availability This is an obsolete item but is available from our stock. Order now from profideals for expert support and fast delivery. FAQ What is the difference between the LR1-D63357 and the modern LRD3357?The LRD3357 is the direct modern replacement from Schneider Electric’s TeSys line. While functionality is nearly identical, the LRD series may feature improved materials, updated certifications, and slightly different physical dimensions or markings. Both offer Class 10 protection in the 37-50A range. How do I select the correct current setting on the dial for my motor?The dial should be set to the motor’s full load ampere (FLA) rating, which can be found on the motor’s nameplate. Setting it higher can lead to motor damage, while setting it too low can cause nuisance tripping. Can this relay be mounted separately from a contactor?Yes, while it’s designed for direct mounting on LC1-D contactors, it can also be mounted on a DIN rail using a separate terminal block adapter, such as the LA7D3064. This allows for flexible panel layouts. Last Update: Friday, March 13, 2026 profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners.