Schneider LRD10 LRD10 Thermal Overload Relay 4-6A Class 10 for LC1D Contactors

The Schneider Electric LRD10 is a TeSys LRD differential thermal overload relay with an adjustable current range of 4 to 6 A, designed for motor protection in AC and DC power circuits. Featuring Class 10A trip characteristics per IEC 60947-4-1 and built-in phase loss detection, it mounts directly below compatible LC1D contactors for a compact motor starter assembly.

Technical specifications:

• Commercial reference: LRD10
• Manufacturer: Schneider Electric
• EAN:
• Series / range: TeSys LRD / TeSys Deca
• Product type: Differential thermal overload relay
• Application: Motor protection
• Thermal overload setting: 4...6 A
• Tripping class: Class 10A per IEC 60947-4-1
• Network type: AC / DC
• Network frequency: 0...400 Hz
• Rated voltage [Ue]: 690 V AC per IEC 60947-4-1
• Rated insulation voltage [Ui]: 690 V per IEC 60947-4-1; 600 V per UL / CSA
• Rated impulse withstand voltage [Uimp]: 6 kV
• Tripping threshold: 1.14 +/- 0.06 Ir per IEC 60947-4-1
• Phase loss sensitivity: tripping at 130% of Ir in two phases, last phase at 0
• Auxiliary contacts: 1 NO + 1 NC
• Thermal current in air [Ith]: 5 A (signal circuit)
• Permissible current: 3 A at 120 V AC-15 / 0.22 A at 125 V DC-13 (signal circuit)
• Associated fuse: 4 A gG / 4 A BS (signal circuit)
• Temperature compensation: -20...60 °C
• Compatible contactors: LC1D09, LC1D12, LC1D18, LC1D25, LC1D32, LC1D38
• Mounting: below contactor; panel or DIN rail with accessories
• Control circuit connection: screw terminals, 1...2.5 mm² (flexible or solid)
• Power circuit connection: screw terminals, 1.5...10 mm² flexible / 1...6 mm² solid
• Tightening torque: 1.7 N.m (control and power circuit screw terminals)
• Dimensions (W x H x D): 45 x 66 x 70 mm
• Weight: 0.124 kg
• IP protection: IP20 per IEC 60529
• Operating temperature: -20...60 °C per IEC 60947-4-1
• Storage temperature: -60...70 °C
• Dielectric strength: 1.89 kV at 50 Hz per IEC 60947-1
• Vibration resistance: 6 Gn per IEC 60068-2-6
• Shock resistance: 15 Gn for 11 ms per IEC 60068-2-7
• Flame resistance: V1 per UL 94
• 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, EN 50495
• Certifications: IEC, UL, CSA, CCC, EAC, BV, RINA, DNV-GL, LROS, ATEX INERIS, UKCA
• Warranty: 18 months

Features and benefits:

• Direct mounting below LC1D contactors eliminates additional wiring for a space-saving motor starter
• Phase loss detection trips at 130% of Ir in two phases, preventing single-phase motor damage
• Red stop and blue reset push buttons for local manual control and fault reset
• Wide operating temperature range with stable tripping characteristics from -20 to 60 °C
• Broad certification portfolio covering IEC, UL, CSA, ATEX, and UKCA for global deployment

Applications:

• Motor protection in industrial automation panels and control cabinets
• Three-phase motor starters combined with LC1D09 to LC1D38 contactors
• Pumps, fans, compressors, and conveyor drive protection
• Marine and hazardous-area installations (ATEX INERIS, DNV-GL, LROS certified)
• AC and DC motor control circuits up to 690 V

Compliant with EN/IEC 60947-4-1, EN/IEC 60947-5-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, GB/T 14048.4, and EN 50495. Part of the Schneider Electric TeSys Deca range.

Also known as: Schneider LRD10, Schneider Electric LRD10, TeSys LRD thermal overload relay, motor protection relay 4-6A.