SPAL Brushless Fans

Note: The quantity in stock updates each night at midnight. This doesn't include any orders that we've taken throughout the day.

Important! The EASIEST solution to running a brushless fan is to use Spal's sensor and harnesses to operate it. The fan connects to the SBL-YAZ-PT10 which connects to the SBL-TS-HARN which connects to Spal's temperature sensor. This makes the fan have a variable speed. As the engine gets hotter, the fan spins faster.

Considering a positive logic duty cycle definition:
• Continuous low voltage is 0% duty cycle (dominant level)
• Continuous high voltage is 100% duty cycle (recessive level)

This diagram shows how the fan will respond to varying duty cycle:

Note: Not all SPAL brushless fans use this response curve, but this is the most common. If you have questions contact SPAL technical support and be sure to include the part number of the fan you're using.