| Attribute | Value |
|---|---|
| Product Name | Telemecanique Schneider LR9 F 5371 Thermal Overload Relay |
| Manufacturer | Telemecanique / Schneider Electric / Square D / Tesys |
| Part Type | Thermal Overload Relay |
| Model / Part Number | LR9 F 5371 |
| Function | Electronic Motor Protection |
| Class | Class 10 / Class 10A |
| Current Range | 132A – 220A |
| Standards | IEC 947-1 / 947-4-1 / 255-8 / 255-6 VDE 0660-100 / 0660-102 EN 60947-1 / 60947-4-1 NFC 63001 / 63110 |
| Impulse Withstand Voltage (Uimp) | 8 kV |
| Rated Insulation Voltage (Ui) | 1000 V |
| Frequency | 50–60 Hz |
| Thermal Current (Ith) | 5A |
| Voltage Rating | 600V AC Max |
| Wire Size | AWG 300MCM – 6 |
| Temperature Rating | 75°C CU |
| Torque Rating | 275 lb.in. |
| Terminal Kit | Cat No: DZ2FH… |
| Control Ratings | B600 / R300 |
| Additional Codes | 2T0252 302929 1378628 01 41 056601 03389110566 W9 1378620 01 41 A06 |
| Equipment Type | Distribution Panels & Boards |
| Equipment Part No. | 875.005-040 |
| Country of Origin | France |
| Weight | 1.080 kg |
| Reference No. | 60581 |
What is the Telemecanique Schneider LR9 F 5371 thermal overload relay?
The LR9 F 5371 is an advanced thermal overload relay from Schneider Electric’s Telemecanique series that works to protect motors against overheating from excessive current or prolonged overload conditions. It responds to the heat generated from the motor current flow and makes trips to prevent damage to a motor.
This model is generally used with contactors and motor starters, easily fitting into control panels and electrical protection systems.
With its robust construction and high-precision thermal sensing, it is suitable for continuous industrial and marine applications where motor reliability is critical.
Key Features of Schneider LR9 F 5371 Thermal Overload Relay
1. Accurate Thermal Overload Protection
Equipped with leading-edge thermal sensing elements, it ensures consistent protection against sustained overloads.
2. Adjustable Current Settings
It allows flexible current range adjustments to match the specific motor rating and thus enhances compatibility.
3. Trip-Free Mechanism
The relay is designed to assure that, once tripped, it cannot be forced back on until conditions return to safe levels.
4. Options for Manual and Automatic Reset
Operators can choose between manual reset for controlled operations or automatic reset for quick recovery.
5. Reliable Coordination with Contactors
It integrates smoothly with Schneider and Telemecanique contactors for stable motor control.
6. Compact & Durable Design
Designed for extreme industrial and marine conditions, it resists vibration, temperature extremes, and dust.
7. Status Indicators
Clear indicators ensure quick troubleshooting and maintenance.
Applications of LR9 F 5371 Thermal Overload Relay
LR9 F 5371 finds its usage in automation, machinery, and marine industries where motors need to run with safety and efficiency.
Common Uses Include:
Industrial Pumps
Protects pump motors from dry-run, overload, and mechanical strain.
HVAC Systems
Provides safety in compressors, blowers, and air-handling equipment.
Conveyors & Material Handling Systems
It prevents engine overheating during high-load operations.
Marine Machinery
Used onboard ships for winches, auxiliary motors, hydraulic power packs, and navigation equipment.
Manufacturing & Production Lines
Suitable for motors in packaging, processing, and assembly machinery.
Automation Panels
Pressfit: Integrated into control panels requiring reliable overload protection.
Why Choose the Schneider LR9 F 5371 Thermal Overload Relay?
1. Proven Reliability
Schneider is a worldwide leader in motor protection solutions known for long-lasting performance.
2. Protection for Expensive Motors
Timely overload detection helps prevent costly breakdowns, downtime, and repairs.
3. Wide Compatibility
Works with a variety of starters and contactors for easy integration.
4. Precision and Stability
Offers reliable protection against fluctuations in load conditions.
5. Ideally Suited for Difficult
Environments Ideal for marine, industrial, and automation installations where reliability cannot be compromised.
6. Easy Installation and Maintenance
Designed for quick setup with minimal wiring adjustments.
