
Markel 57640005 Switch
The Markel 57640005 L325F Auto Reset Limit Switch is a critical safety component designed for high-limit thermal protection in industrial heating and HVAC systems. As an veteran-grade OEM replacement part, this switch features an integrated capillary tube for precise temperature sensing and a protective cap to maintain environmental integrity. The L325F specification ensures the circuit opens when temperatures hit the 325°F threshold, providing reliable overheat protection for electric furnaces, baseboard heaters, and industrial machinery. Its automatic reset functionality eliminates the need for manual intervention, allowing the system to restore power once the bimetal strip cools to safe operating levels. This compact thermal limit switch is engineered for high-duty cycles where minimal downtime is required. Field-tested for longevity, the 57640005 switch handles high-current loads and ensures your equipment remains compliant with protective standards without the drift common in lower-grade aftermarket alternatives.
Key Benefits- High-Limit Precision: Calibrated for a 325°F trip point to prevent catastrophic thermal runaway.
- Auto Reset Mechanism: Resumes standard operation automatically after cooling, reducing maintenance calls.
- Capillary Tube Sensing: Provides accurate temperature monitoring even in tight or remote industrial housings.
- Durable Construction: Built to withstand commercial HVAC system vibrations and thermal cycling.
- OEM Compatibility: Exact replacement for Markel 57640005, ensuring proper mounting and electrical fitment.
Is this switch compatible with manual reset systems?
No, this is an auto reset limit switch. If your safety circuit requires a manual reset for compliance, look for the L325F manual equivalent.
Does the 57640005 include the sensing capillary?
Yes, this unit comes with the capillary and cap assembly required for standard industrial heating applications.
What happens if the switch trips frequently?
Frequent tripping indicates an airflow restriction or a failing blower motor. Ensure the system is clear of obstructions to protect the limit control switch from premature wear.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Markel 57640005 Switch
The Markel 57640005 L325F Auto Reset Limit Switch is a critical safety component designed for high-limit thermal protection in industrial heating and HVAC systems. As an veteran-grade OEM replacement part, this switch features an integrated capillary tube for precise temperature sensing and a protective cap to maintain environmental integrity. The L325F specification ensures the circuit opens when temperatures hit the 325°F threshold, providing reliable overheat protection for electric furnaces, baseboard heaters, and industrial machinery. Its automatic reset functionality eliminates the need for manual intervention, allowing the system to restore power once the bimetal strip cools to safe operating levels. This compact thermal limit switch is engineered for high-duty cycles where minimal downtime is required. Field-tested for longevity, the 57640005 switch handles high-current loads and ensures your equipment remains compliant with protective standards without the drift common in lower-grade aftermarket alternatives.
Key Benefits- High-Limit Precision: Calibrated for a 325°F trip point to prevent catastrophic thermal runaway.
- Auto Reset Mechanism: Resumes standard operation automatically after cooling, reducing maintenance calls.
- Capillary Tube Sensing: Provides accurate temperature monitoring even in tight or remote industrial housings.
- Durable Construction: Built to withstand commercial HVAC system vibrations and thermal cycling.
- OEM Compatibility: Exact replacement for Markel 57640005, ensuring proper mounting and electrical fitment.
Is this switch compatible with manual reset systems?
No, this is an auto reset limit switch. If your safety circuit requires a manual reset for compliance, look for the L325F manual equivalent.
Does the 57640005 include the sensing capillary?
Yes, this unit comes with the capillary and cap assembly required for standard industrial heating applications.
What happens if the switch trips frequently?
Frequent tripping indicates an airflow restriction or a failing blower motor. Ensure the system is clear of obstructions to protect the limit control switch from premature wear.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Markel 57640005 L325F Auto Reset Limit Switch is a critical safety component designed for high-limit thermal protection in industrial heating and HVAC systems. As an veteran-grade OEM replacement part, this switch features an integrated capillary tube for precise temperature sensing and a protective cap to maintain environmental integrity. The L325F specification ensures the circuit opens when temperatures hit the 325°F threshold, providing reliable overheat protection for electric furnaces, baseboard heaters, and industrial machinery. Its automatic reset functionality eliminates the need for manual intervention, allowing the system to restore power once the bimetal strip cools to safe operating levels. This compact thermal limit switch is engineered for high-duty cycles where minimal downtime is required. Field-tested for longevity, the 57640005 switch handles high-current loads and ensures your equipment remains compliant with protective standards without the drift common in lower-grade aftermarket alternatives.
Key Benefits- High-Limit Precision: Calibrated for a 325°F trip point to prevent catastrophic thermal runaway.
- Auto Reset Mechanism: Resumes standard operation automatically after cooling, reducing maintenance calls.
- Capillary Tube Sensing: Provides accurate temperature monitoring even in tight or remote industrial housings.
- Durable Construction: Built to withstand commercial HVAC system vibrations and thermal cycling.
- OEM Compatibility: Exact replacement for Markel 57640005, ensuring proper mounting and electrical fitment.
Is this switch compatible with manual reset systems?
No, this is an auto reset limit switch. If your safety circuit requires a manual reset for compliance, look for the L325F manual equivalent.
Does the 57640005 include the sensing capillary?
Yes, this unit comes with the capillary and cap assembly required for standard industrial heating applications.
What happens if the switch trips frequently?
Frequent tripping indicates an airflow restriction or a failing blower motor. Ensure the system is clear of obstructions to protect the limit control switch from premature wear.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












