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The LR2-D13 Thermal Relay is a professional industrial-grade motor overload protection device engineered to deliver sustained, reliable protection for single-phase and three-phase electric motors in heavy-duty operational scenarios. Leveraging proven bimetallic sensing technology, it continuously monitors motor operating current and internal temperature, and promptly disconnects the circuit upon detection of overload, phase failure or abnormal overheating to prevent motor burnout, prolong equipment service life and maintain stable operation of the entire power control system. This LR2-D Series Thermal Relay boasts a compact structure, tool-free wiring and quick installation, making it an essential matching component for motor control cabinets, automated production lines and fixed electrical equipment. Fully compliant with IEC international standards and compatible with 50/60 Hz power systems, it delivers dependable overload protection for small and medium-sized motors across manufacturing, HVAC, renewable energy and other key industrial sectors for enterprise clients.
High-sensitivity bimetallic components detect subtle current anomalies, with tripping action triggered within 2–20 seconds at 1.5× rated current, effectively preventing motor damage caused by long-term light overload or instantaneous heavy overload.
Automatic tripping and power cutoff under single-phasing faults eliminate the risk of motor burning due to unbalanced three-phase current, serving as a critical safety safeguard for uninterrupted industrial production.
Tripping current can be flexibly adjusted from 0.1A to 100A, compatible with motors of diverse power ratings and enabling precise parameter matching to avoid false tripping or protection failure.
The tripping status is locked after protection actuation and retained until manual reset, preventing accidental restart under fault conditions and reducing safety risks during equipment maintenance.
Dust-proof housing design adapts to standard industrial workshops, delivering strong anti-interference performance and stable operation in long-term continuous working modes.
Type | Rated working current of thermal relay | Thermal component | ||
Rated current (A) | Rated or scale of rated current (A) | |||
LR2-D13 | 25 | LR2-D1301 | 0.16 | 0.10-0.16 |
LR2-D1302 | 0.25 | 0.16-0.25 | ||
LR2-D1303 | 0.40 | 0.25-0.40 | ||
LR2-D1304 | 0.63 | 0.40-0.63 | ||
LR2-D1305 | 1.0 | 0.63-1.0 | ||
LR2-D1306 | 1.6 | 1.0-1.6 | ||
LR2-D13X6 | 2.0 | 1.25-2.0 | ||
LR2-D1307 | 2.5 | 1.6-2.5 | ||
LR2-D1308 | 4.0 | 2.5-4.0 | ||
LR2-D1310 | 6.0 | 4.0-6.0 | ||
LR2-D1312 | 8.0 | 5.5-8.0 | ||
LR2-D1314 | 10.0 | 7.0-10.0 | ||
LR2-D1316 | 13.0 | 9.0-13.0 | ||
LR2-D1321 | 18.0 | 12.0-18.0 | ||
LR2-D1322 | 25.0 | 17.0-25.0 | ||
LR2-D23 | 36 | LR2-D2353 | 32 | 23.0-32.0 |
LR2-D2355 | 36 | 28.0-36.0 | ||
LR2-D33 | 93 | LR2-D3353 | 32 | 23.0-32.0 |
LR2-D3355 | 40 | 30.0-40.0 | ||
LR2-D3357 | 50 | 37.0-50.0 | ||
LR2-D3359 | 65 | 48.0-65.0 | ||
LR2-D3361 | 70 | 55.0-70.0 | ||
LR2-D3363 | 90 | 63.0-80.0 | ||
LR2-D3365 | 93 | 80.0-93.0 | ||
The LR2-D13 Thermal Relay serves enterprise customers with comprehensive motor-driven system protection, covering core industrial fields including
Motor control centers that protect induction motors in water pumps, fans, compressors and belt conveyors to ensure stable material and fluid transmission
Industrial automation production lines that integrate with PLC control systems to provide real-time overload protection for processing equipment and assembly lines
HVAC systems that safeguard blower and compressor motors in central air conditioning and ventilation equipment to lower the failure rate of commercial HVAC systems
Renewable energy equipment that offers reliable protection for driving motors in wind turbines and solar tracking systems, adapting to outdoor and semi-outdoor operating environments
We provide personalized customization and full-cycle OEM/ODM cooperation for industrial partners to meet special working condition demands. Services cover custom current adjustment ranges, reset mode modification (manual/automatic), addition of auxiliary contacts for remote signal feedback, customization of shell color and terminal structure, as well as branded label and packaging design. Our professional R&D and production team delivers one-stop support from scheme design to mass production, helping enterprise customers build highly compatible and stable motor protection systems tailored to their operational needs.
It supports manual reset via the built-in reset button and automatic reset after a proper cool-down period, with the mode selectable based to on-site application requirements.
Yes, it can be used in conjunction with VFDs. Only simple adjustment of the setting current is required to match the output characteristics of the frequency converter.
When the load reaches 1.5× rated current, the relay trips within 2–20 seconds, fully complying with IEC international standard requirements.
Basic models feature local status indication, while advanced versions equipped with auxiliary contacts can be connected to a control console to realize remote real-time status monitoring.
The LR2-D13 Thermal Relay is a professional industrial-grade motor overload protection device engineered to deliver sustained, reliable protection for single-phase and three-phase electric motors in heavy-duty operational scenarios. Leveraging proven bimetallic sensing technology, it continuously monitors motor operating current and internal temperature, and promptly disconnects the circuit upon detection of overload, phase failure or abnormal overheating to prevent motor burnout, prolong equipment service life and maintain stable operation of the entire power control system. This LR2-D Series Thermal Relay boasts a compact structure, tool-free wiring and quick installation, making it an essential matching component for motor control cabinets, automated production lines and fixed electrical equipment. Fully compliant with IEC international standards and compatible with 50/60 Hz power systems, it delivers dependable overload protection for small and medium-sized motors across manufacturing, HVAC, renewable energy and other key industrial sectors for enterprise clients.
High-sensitivity bimetallic components detect subtle current anomalies, with tripping action triggered within 2–20 seconds at 1.5× rated current, effectively preventing motor damage caused by long-term light overload or instantaneous heavy overload.
Automatic tripping and power cutoff under single-phasing faults eliminate the risk of motor burning due to unbalanced three-phase current, serving as a critical safety safeguard for uninterrupted industrial production.
Tripping current can be flexibly adjusted from 0.1A to 100A, compatible with motors of diverse power ratings and enabling precise parameter matching to avoid false tripping or protection failure.
The tripping status is locked after protection actuation and retained until manual reset, preventing accidental restart under fault conditions and reducing safety risks during equipment maintenance.
Dust-proof housing design adapts to standard industrial workshops, delivering strong anti-interference performance and stable operation in long-term continuous working modes.
Type | Rated working current of thermal relay | Thermal component | ||
Rated current (A) | Rated or scale of rated current (A) | |||
LR2-D13 | 25 | LR2-D1301 | 0.16 | 0.10-0.16 |
LR2-D1302 | 0.25 | 0.16-0.25 | ||
LR2-D1303 | 0.40 | 0.25-0.40 | ||
LR2-D1304 | 0.63 | 0.40-0.63 | ||
LR2-D1305 | 1.0 | 0.63-1.0 | ||
LR2-D1306 | 1.6 | 1.0-1.6 | ||
LR2-D13X6 | 2.0 | 1.25-2.0 | ||
LR2-D1307 | 2.5 | 1.6-2.5 | ||
LR2-D1308 | 4.0 | 2.5-4.0 | ||
LR2-D1310 | 6.0 | 4.0-6.0 | ||
LR2-D1312 | 8.0 | 5.5-8.0 | ||
LR2-D1314 | 10.0 | 7.0-10.0 | ||
LR2-D1316 | 13.0 | 9.0-13.0 | ||
LR2-D1321 | 18.0 | 12.0-18.0 | ||
LR2-D1322 | 25.0 | 17.0-25.0 | ||
LR2-D23 | 36 | LR2-D2353 | 32 | 23.0-32.0 |
LR2-D2355 | 36 | 28.0-36.0 | ||
LR2-D33 | 93 | LR2-D3353 | 32 | 23.0-32.0 |
LR2-D3355 | 40 | 30.0-40.0 | ||
LR2-D3357 | 50 | 37.0-50.0 | ||
LR2-D3359 | 65 | 48.0-65.0 | ||
LR2-D3361 | 70 | 55.0-70.0 | ||
LR2-D3363 | 90 | 63.0-80.0 | ||
LR2-D3365 | 93 | 80.0-93.0 | ||
The LR2-D13 Thermal Relay serves enterprise customers with comprehensive motor-driven system protection, covering core industrial fields including
Motor control centers that protect induction motors in water pumps, fans, compressors and belt conveyors to ensure stable material and fluid transmission
Industrial automation production lines that integrate with PLC control systems to provide real-time overload protection for processing equipment and assembly lines
HVAC systems that safeguard blower and compressor motors in central air conditioning and ventilation equipment to lower the failure rate of commercial HVAC systems
Renewable energy equipment that offers reliable protection for driving motors in wind turbines and solar tracking systems, adapting to outdoor and semi-outdoor operating environments
We provide personalized customization and full-cycle OEM/ODM cooperation for industrial partners to meet special working condition demands. Services cover custom current adjustment ranges, reset mode modification (manual/automatic), addition of auxiliary contacts for remote signal feedback, customization of shell color and terminal structure, as well as branded label and packaging design. Our professional R&D and production team delivers one-stop support from scheme design to mass production, helping enterprise customers build highly compatible and stable motor protection systems tailored to their operational needs.
It supports manual reset via the built-in reset button and automatic reset after a proper cool-down period, with the mode selectable based to on-site application requirements.
Yes, it can be used in conjunction with VFDs. Only simple adjustment of the setting current is required to match the output characteristics of the frequency converter.
When the load reaches 1.5× rated current, the relay trips within 2–20 seconds, fully complying with IEC international standard requirements.
Basic models feature local status indication, while advanced versions equipped with auxiliary contacts can be connected to a control console to realize remote real-time status monitoring.
