Thermal Protectors for Electric Fans
Featured Product from Saftty Electronic Technology Co., Limited

Electric fan thermal protectors are crucial safety components for a wide range of industries, protecting motors from overheating and preventing potential fire hazards. These protectors are widely used in environments such as tunnels, factory workshops, vehicles, and 5G communication base stations, where the risk of motor failure due to excessive heat is high.
By incorporating a built-in thermal protector, the fan’s motor is safeguarded from conditions that could lead to fire, ensuring continuous operation without safety concerns. When the temperature rises to a critical level, the protector cuts off the power supply to the motor, preventing further overheating. Once the temperature normalizes, the protector resets, allowing the fan to resume operation safely.
Key Features:
- Application Areas: Widely used in industrial environments such as tunnels, workshops, vehicles, and 5G communication base stations.
- Protection Mechanism: The thermal protector deactivates the fan's motor when overheating occurs, ensuring safety by cutting off the power supply.
- Installation Options: Can be embedded in coils or attached to coil surfaces, offering flexibility for different fan designs.
- Temperature Range: Designed to operate at various temperatures (130°C, 150°C, 155°C, 180°C) to match different insulation levels (F or H).
- Certification: Available with various certifications such as UL, VDE/TUV, and CQC to meet international safety standards.
- Blocking Current: Choose from a range of models based on the fan’s rated current to ensure optimal protection.
Installation & Use:
- Installation Site: Can be embedded in coils for better temperature sensitivity or attached to coil surfaces with insulating tape.
- Precautions:
- Ensure plastic pressure is minimal during coil installation to prevent protector deformation.
- Avoid exceeding the protector's maximum current rating to maintain product longevity.
- Follow correct vacuum immersion paint process parameters, as the protector supports a maximum negative pressure of -0.09 Mpa.
By using thermal protectors, professionals can improve the safety and efficiency of their electric fan systems, minimizing the risk of motor failure and fire hazards in critical industrial settings.
Specifications:
- Volume: Circular ST01 and ST06 series for embedded coils; ST07, BW-B for surface-mounted installations.
- Current Ratings: ST01 (6.3A), ST06, STH6 (13.5A) based on fan specifications.
- Temperature: 130°C, 150°C, 155°C, 180°C.
- Contact Switch: Open or closed with manual reset to ensure safety during maintenance.