Schneider Easy TeSys Protect LRE357 37–50A Class 10A Thermal Overload Relay
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Schneider Electric LRE357 is an Easy TeSys Protect Class 10A thermal overload relay with an adjustable 37–50A range for motor overload and phase-failure protection. It provides a 1NO+1NC signalling pair, trip indication, test/stop controls and selectable manual or automatic reset. The exact reference lists LC1E50…95 contactor compatibility. Separate rail or plate mounting requires the appropriate accessory; the contactor and short-circuit protection are selected separately.
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| Model | LRE357 |
|---|---|
| Series / type | Easy TeSys Protect differential thermal overload relay |
| Adjustment range | 37–50A |
| Trip class | Class 10A, IEC 60947-4-1 |
| Application | Motor overload and phase-failure protection |
| Compatible contactors | LC1E50…95 |
| Tripping threshold | 1.14 ±0.06 × Ir, IEC 60947-4-1 |
| Phase-failure response | Trip at 130% of Ir in two phases with the third phase at zero |
| Auxiliary contacts | 1NO (97–98) + 1NC (95–96) |
| Signalling thermal current (Ith) | 5A; utilization-specific switching rating applies |
| Reset modes | Manual or automatic, selected to suit the control circuit; automatic reset can allow restart |
| Controls | Test, stop and reset |
| Mounting | Under contactor; rail/plate mounting with specific accessories |
| Power operational voltage (Ue) | ≤690VAC |
| Network | AC, 50/60Hz |
| Power insulation voltage (Ui) | 690V IEC |
| Impulse withstand (Uimp) | 6kV |
| Temperature compensation | −20 to +60°C |
| Protection degree | IP20, IEC 60529 |
| Operating ambient | −20 to +60°C without derating; up to +70°C with derating |
| Storage ambient | −60 to +80°C |
| Signalling conductors | Two 1–2.5mm² conductors: solid or flexible with/without cable ends |
| Signalling terminal torque | 1.7Nm |
| Standards | EN/IEC 60947-4-1 and EN/IEC 60947-5-1 |
| Power conductors | One 4–35mm² conductor: solid or flexible with/without cable end |
| Power terminal torque | 9Nm |
| Associated power fuses | 100A gG or 63A aM per manufacturer coordination; separate selection |
| Associated signalling fuse | 5A gG |
| Dimensions (H × W × D) | 54 × 70 × 113mm |
| Net weight | 460g |
| Local signalling | Trip indicator |
Schneider Easy TeSys Protect LRE357 37–50A Class 10A Thermal Overload Relay
Schneider Electric LRE357 is an Easy TeSys Protect Class 10A thermal overload relay with an adjustable 37–50A range for motor overload and phase-failure protection. It provides a 1NO+1NC signalling pair, trip indication, test/stop controls and selectable manual or automatic reset. The exact reference lists LC1E50…95 contactor compatibility. Separate rail or plate mounting requires the appropriate accessory; the contactor and short-circuit protection are selected separately.
Key specifications
- Model: LRE357
- Series / type: Easy TeSys Protect differential thermal overload relay
- Adjustment range: 37–50A
- Trip class: Class 10A, IEC 60947-4-1
- Application: Motor overload and phase-failure protection
- Compatible contactors: LC1E50…95
- Tripping threshold: 1.14 ±0.06 × Ir, IEC 60947-4-1
- Phase-failure response: Trip at 130% of Ir in two phases with the third phase at zero
- Auxiliary contacts: 1NO (97–98) + 1NC (95–96)
- Signalling thermal current (Ith): 5A; utilization-specific switching rating applies
- Reset modes: Manual or automatic, selected to suit the control circuit; automatic reset can allow restart
- Controls: Test, stop and reset
- Mounting: Under contactor; rail/plate mounting with specific accessories
- Power operational voltage (Ue): ≤690VAC
- Network: AC, 50/60Hz
- Power insulation voltage (Ui): 690V IEC
- Impulse withstand (Uimp): 6kV
- Temperature compensation: −20 to +60°C
- Protection degree: IP20, IEC 60529
- Operating ambient: −20 to +60°C without derating; up to +70°C with derating
- Storage ambient: −60 to +80°C
- Signalling conductors: Two 1–2.5mm² conductors: solid or flexible with/without cable ends
- Signalling terminal torque: 1.7Nm
- Standards: EN/IEC 60947-4-1 and EN/IEC 60947-5-1
- Power conductors: One 4–35mm² conductor: solid or flexible with/without cable end
- Power terminal torque: 9Nm
- Associated power fuses: 100A gG or 63A aM per manufacturer coordination; separate selection
- Associated signalling fuse: 5A gG
- Dimensions (H × W × D): 54 × 70 × 113mm
- Net weight: 460g
- Local signalling: Trip indicator
Official Schneider Electric datasheet
Submit your RFQ. Our team will send a quotation confirming price and availability.
| Model | LRE357 |
|---|---|
| Series / type | Easy TeSys Protect differential thermal overload relay |
| Adjustment range | 37–50A |
| Trip class | Class 10A, IEC 60947-4-1 |
| Application | Motor overload and phase-failure protection |
| Compatible contactors | LC1E50…95 |
| Tripping threshold | 1.14 ±0.06 × Ir, IEC 60947-4-1 |
| Phase-failure response | Trip at 130% of Ir in two phases with the third phase at zero |
| Auxiliary contacts | 1NO (97–98) + 1NC (95–96) |
| Signalling thermal current (Ith) | 5A; utilization-specific switching rating applies |
| Reset modes | Manual or automatic, selected to suit the control circuit; automatic reset can allow restart |
| Controls | Test, stop and reset |
| Mounting | Under contactor; rail/plate mounting with specific accessories |
| Power operational voltage (Ue) | ≤690VAC |
| Network | AC, 50/60Hz |
| Power insulation voltage (Ui) | 690V IEC |
| Impulse withstand (Uimp) | 6kV |
| Temperature compensation | −20 to +60°C |
| Protection degree | IP20, IEC 60529 |
| Operating ambient | −20 to +60°C without derating; up to +70°C with derating |
| Storage ambient | −60 to +80°C |
| Signalling conductors | Two 1–2.5mm² conductors: solid or flexible with/without cable ends |
| Signalling terminal torque | 1.7Nm |
| Standards | EN/IEC 60947-4-1 and EN/IEC 60947-5-1 |
| Power conductors | One 4–35mm² conductor: solid or flexible with/without cable end |
| Power terminal torque | 9Nm |
| Associated power fuses | 100A gG or 63A aM per manufacturer coordination; separate selection |
| Associated signalling fuse | 5A gG |
| Dimensions (H × W × D) | 54 × 70 × 113mm |
| Net weight | 460g |
| Local signalling | Trip indicator |