Square D TeSys LRK Differential Thermal Overload Relay, 0.36–0.54A, LR2K0304
The Square D LR2K0304 TeSys LRK differential thermal overload relay provides Class 10A motor protection for 1/8–1/6 HP motors. Features a 0.36–0.54A adjustment range, phase unbalance detection, and screw clamp terminals. Compatible with TeSys K contactors (LC1K, LP1K, LP4K, LC7K). UL/CSA listed, IEC 60947 rated.
Square D TeSys LRK Differentia...
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Overview
The Square D LR2K0304 is a differential thermal overload relay from the TeSys LRK series, engineered by Schneider Electric for reliable motor protection in industrial control applications. Designed to mount directly under TeSys K contactors, this relay guards 1/8 to 1/6 HP motors against overload and phase loss conditions. Its Class 10A trip characteristic and 0.36–0.54A adjustment range make it well-suited for light-duty motor starters in commercial and industrial equipment.
Features
- Thermal protection range: 0.36–0.54A, Class 10A per IEC 60947-4-1
- Phase failure (unbalance) sensitivity for enhanced motor protection
- 1 NO + 1 NC auxiliary contact composition for control circuit integration
- Manual or automatic reset modes via selector switch
- Red trip-test push button and blue stop/manual reset push button
- Yellow trip indicator for local status signalling
- Screw clamp terminals accepting 0.75–4 mm² flexible and 1.5–4 mm² solid conductors
- Compatible contactors: LC1K, LP1K, LP4K, LC7K (TeSys K series)
- Mounting options: under contactor, rail (with accessories), or plate (with accessories)
- Rated insulation voltage: 690 V (IEC/BS), 600 V (CSA)
- Operating temperature: −20 to 55°C without derating; −30 to 60°C with derating
- IP2X degree of protection per IEC 60529
- Green Premium (RoHS compliant, REACh declaration, environmental profile available)
- 18-month contractual warranty
Specifications
| Model Number | LR2K0304 |
|---|---|
| Series | TeSys LRK |
| Manufacturer | Square D (Schneider Electric) |
| Product Type | Differential Thermal Overload Relay |
| Thermal Protection Range | 0.36–0.54 A |
| Overload Class | Class 10A per IEC 60947-4-1 |
| Auxiliary Contacts | 1 NO + 1 NC |
| Rated Insulation Voltage (Ui) | 690 V (IEC/BS), 600 V (CSA) |
| Rated Operational Voltage (Ue) | ≤ 690 V (power circuit) |
| Conventional Free Air Thermal Current (Ith) | 6 A (signalling circuit) |
| Impulse Withstand Voltage (Uimp) | 6 kV |
| Power Dissipation per Pole | 2 W |
| Terminal Type | Screw Clamp |
| Compatible Contactors | LC1K, LP1K, LP4K, LC7K |
| Height | 2.28 in (58 mm) |
| Width | 1.77 in (45 mm) |
| Depth | 2.56 in (65 mm) |
| Net Weight | 0.32 lb (145 g) |
| IP Rating | IP2X (IEC 60529) |
| Operating Temperature | −4 to 131°F (−20 to 55°C) |
| Storage Temperature | −40 to 158°F (−40 to 70°C) |
| Certifications | UL, CSA, UKCA |
| Standards | IEC 60947, NF C 63-650, VDE 0660, BS 4941 |
| Country of Origin | Czech Republic |
| UPC | 78590188352 |
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