Square D TeSys Deca Differential Thermal Overload Relay, 0.4–0.63A Class 10A, LRD04
$133.24
Square D (Schneider Electric) LRD04 TeSys Deca differential thermal overload relay for motor protection. Thermal range 0.40–0.63A, Class 10A tripping, phase unbalance protection. For use with TeSys Deca contactors LC1D09–LC1D32. Rated 690V AC. Certified to IEC, UL, and CSA standards.
Square D TeSys Deca Differenti...
$133.24
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Overview
The Square D LRD04 is a TeSys Deca differential thermal overload relay engineered to protect motors from overload and phase failure conditions. Designed for direct mounting under TeSys Deca contactors (LC1D09 through LC1D32), the LRD04 delivers reliable motor protection for 1/8 to 1/6 HP applications with a thermal adjustment range of 0.40 to 0.63A and a Class 10A tripping characteristic per IEC 60947-4-1.
The relay features built-in phase unbalance sensitivity — tripping when current on two phases reaches 130% of Ir while the third phase is at zero — safeguarding motors from damaging unbalanced supply conditions. Temperature compensation is rated from -20°C to +60°C (-4°F to +140°F) without derating, making it suitable for demanding industrial environments.
Key Features
- Differential thermal overload relay for motor protection (1/8 to 1/6 HP)
- Thermal protection adjustment range: 0.40–0.63A
- Class 10A tripping per IEC 60947-4-1
- Phase unbalance / phase failure protection (trips at 130% Ir on two phases)
- 1 NO + 1 NC auxiliary contact composition
- Red push-button STOP / Blue push-button RESET control
- Mounts directly under TeSys Deca contactors LC1D09, LC1D12, LC1D18, LC1D25, LC1D32, LC1D38
- Also mountable on plate or DIN rail with accessories
- Rated insulation voltage: 690V AC (IEC), 600V UL/CSA
- Rated impulse withstand voltage (Uimp): 6 kV
- IP20 protection per IEC 60529
- Flame retardance: V1 per UL 94
- Temperature compensation: -20°C to +60°C without derating
- Country of origin: France
Specifications
| Model Number | LRD04 |
|---|---|
| Product Type | Differential Thermal Overload Relay |
| Series | TeSys Deca |
| Thermal Range | 0.40–0.63A |
| Tripping Class | Class 10A (IEC 60947-4-1) |
| Relay Application | Motor Protection |
| Compatible Contactors | LC1D09, LC1D12, LC1D18, LC1D25, LC1D32, LC1D38 |
| Network Type | AC / DC |
| Network Frequency | 0–400 Hz |
| Rated Insulation Voltage (Ui) | 690V AC (IEC), 600V UL/CSA |
| Rated Impulse Withstand Voltage (Uimp) | 6 kV |
| Tripping Threshold | 1.14 ±0.06 Ir (IEC 60947-4-1) |
| Auxiliary Contacts | 1 NO + 1 NC |
| Conventional Free Air Thermal Current (Ith) | 5A (signalling circuit) |
| Permissible Current (AC-15) | 3A at 120V AC |
| Permissible Current (DC-13) | 0.22A at 125V DC |
| Associated Fuse Rating | 4A gG / 4A BS (signalling circuit) |
| Connection Type | Control Circuit Screw Clamp Terminals |
| Control Circuit Wire Range | 1–2.5 mm² flexible/solid |
| Power Circuit Wire Range | 1.5–10 mm² flexible without end; 1–6 mm² solid |
| Tightening Torque | 1.7 N.m (15.05 lbf.in) — control and power circuits |
| Phase Failure Sensitivity | Trips at 130% Ir on two phases, last phase at 0 |
| IP Rating | IP20 (IEC 60529) |
| Operating Temperature | -20°C to +60°C (-4°F to +140°F) |
| Storage Temperature | -60°C to +70°C (-76°F to +158°F) |
| Dielectric Strength | 1.89 kV at 50 Hz (IEC 60947-1) |
| Vibration Resistance | 6 Gn (IEC 60068-2-6) |
| Shock Resistance | 15 Gn for 11 ms (IEC 60068-2-7) |
| Flame Retardance | V1 (UL 94) |
| Height | 2.60 in (66 mm) |
| Width | 1.77 in (45 mm) |
| Depth | 2.76 in (70 mm) |
| Net Weight | 0.27 lb (0.124 kg) |
| UPC | 78590120671 |
| GTIN | 3389110346749 |
| Country of Origin | France |
| 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, GL, LROS, ATEX INERIS, UKCA |
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