The Schneider Electric LR2K0310 is a TeSys K differential thermal overload relay for motor protection, with a current setting range of 2.6 to 3.7 A and Class 10A tripping per IEC 60947-4-1. It mounts directly below TeSys K contactors (LC1K, LC7K, LP1K, LP4K) and operates on both AC and DC networks.

Technical specifications:

• Commercial reference: LR2K0310
• Manufacturer: Schneider Electric
• EAN: 3389110230499
• Series / range: TeSys K (TeSys LRK)
• Product type: Differential thermal overload relay
• Relay use: Motor protection
• Thermal overload setting: 2.6…3.7 A
• Tripping class: Class 10A per IEC 60947-4-1
• Network type: AC / DC
• Rated insulation voltage [Ui]: 690 V per IEC 60947; 750 V per VDE 0110 group C; 600 V per CSA C22.2 No 14
• Rated impulse withstand voltage [Uimp]: 6 kV
• Auxiliary contacts: 1 NO + 1 NC
• Allowable thermal current [Ith]: 6 A (signal circuit)
• Phase loss sensitivity: Yes, per IEC 60947-4-1
• Mounting: Below contactor; panel or DIN rail with separate accessories
• Connection: Screw terminal blocks, 1.5…4 mm solid, 0.75…4 mm flexible
• Tightening torque: 1.3 N.m
• Dimensions (WxHxD): 45 x 58 x 65 mm
• Weight: 0.145 kg
• IP rating: IP2x per IEC 60529
• Operating temperature: -20…55C (without characteristic change) per IEC 60947
• Storage temperature: -40…70C
• Standards: IEC 60947, VDE 0660, BS 4941, NF C 63-650
• Certifications: UL, CSA, UKCA

Features and benefits:

• Differential thermal trip mechanism protects motors reliably across AC and DC networks up to 400 Hz
• Phase loss sensitivity detects single-phase conditions per IEC 60947-4-1, preventing motor damage
• Selectable manual or automatic reset via front-mounted selector switch for flexible operation
• Yellow trip indicator provides clear local fault signaling at a glance
• Direct-mount design below TeSys K contactors enables compact, wiring-efficient panel assemblies

Applications:

• Motor overload protection in motor control centers and direct-on-line starter assemblies
• Reversing starter panels for industrial machinery and conveyor drives
• Pump and fan motor protection in HVAC and building services installations
• Compressor and mixer drive protection in manufacturing and process plants

Compliant with IEC 60947, VDE 0660, BS 4941, and NF C 63-650. Part of the Schneider Electric TeSys K range.

Also known as: Schneider LR2K0310, Schneider Electric LR2K0310, TeSys K overload relay, thermal motor protection relay 2.6-3.7A.