Square D TeSys LRK Differential Thermal Overload Relay, 3.7-5.5A, Class 10A, LR2K0312
$93.82
The Square D (Schneider Electric) LR2K0312 is a TeSys LRK differential thermal overload relay designed for motor protection in combination with TeSys K contactors. It provides thermal protection across a 3.7–5.5 A adjustment range with Class 10A tripping and built-in phase unbalance detection. Screw clamp terminals accept 0.75–4 mm² conductors, and the relay carries UL, CSA, and UKCA certifications.
Square D TeSys LRK Differentia...
$93.82
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Overview
The Square D (Schneider Electric) LR2K0312 TeSys LRK differential thermal overload relay delivers reliable motor protection for 3-phase AC and DC circuits. Designed to mount directly under TeSys K contactors (LC1K, LP1K, LP4K, LC7K series), it guards against overload and phase unbalance with a Class 10A tripping profile per IEC 60947-4-1. The relay features manual or automatic reset modes, a trip indicator, and a red push-button trip test — making commissioning and maintenance straightforward for industrial control panels.
Features
- Thermal protection range: 3.7–5.5 A, adjustable
- Class 10A tripping per IEC 60947-4-1
- Phase unbalance (differential) sensitivity — protects against single-phasing conditions
- Auxiliary contacts: 1 NO + 1 NC signalling circuit
- Selectable manual or automatic reset via selector switch
- Red push-button trip test and blue push-button stop/reset
- Yellow trip indicator for visual status
- Screw clamp terminals: 0.75–4 mm² flexible / 1.5–4 mm² solid conductors
- Mounts under contactor or on DIN rail / plate with accessories
- Compatible with TeSys K contactors: LC1K, LP1K, LP4K, LC7K
- Certifications: UL Listed, CSA Certified, UKCA
- Standards: IEC 60947, VDE 0660, BS 4941, NF C 63-650
Specifications
| Specification | Value |
|---|---|
| Manufacturer Part Number | LR2K0312 |
| Series | TeSys LRK |
| Product Type | Differential Thermal Overload Relay |
| Thermal Protection Range | 3.7–5.5 A |
| Tripping Class | Class 10A (IEC 60947-4-1) |
| Network Type | AC / DC |
| Network Frequency | ≤ 400 Hz |
| Rated Insulation Voltage (Ui) | 690 V (IEC/BS); 750 V (VDE); 600 V (CSA) |
| Rated Operational Voltage (Ue) | ≤ 690 V (power circuit) |
| Rated Impulse Withstand Voltage (Uimp) | 6 kV |
| Conventional Free Air Thermal Current (Ith) | 6 A (signalling circuit) |
| Auxiliary Contacts | 1 NO + 1 NC |
| Phase Failure Sensitivity | Yes |
| Power Dissipation per Pole | 2 W |
| IP Degree of Protection | IP2X (IEC 60529) |
| Operating Temperature | -20…55 °C (without derating); -30…60 °C (with derating) |
| Storage Temperature | -40…70 °C |
| Operating Altitude | Up to 2000 m without derating |
| Terminal Type | Screw Clamp |
| Conductor Range | 0.75–4 mm² flexible; 1.5–4 mm² solid |
| Tightening Torque | 1.3 N·m (11.51 lbf·in) |
| Height | 58 mm (2.28 in) |
| Width | 45 mm (1.77 in) |
| Depth | 65 mm (2.56 in) |
| Net Weight | 0.145 kg (0.32 lb) |
| Country of Origin | Czech Republic |
| UPC | 78590188303 |
| UNSPSC | 39122330 |
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