jmc’s 40x56mm counter-rotating fan is ideal for high-density 1u servers and power supplies or any other high-density electronic enclosures. counter-rotating technology creates extremely powerful and concentrated air?ow while maintaining high e?ciency and an outstanding performance (pq) curve.

                                                



the fan's technical specifications are:
- 20,000 rpm
- 40 cfm
- 3.4 inches of h20
- 69 dba
- 3.1 amps at 12 vdc
- life data of 70,000 hours l10 at 40c
- 4 ball bearings
- ul & tuv certi?ed and 100% rohs compliant

among the many excellent features of the fan, engineers will find that ffollowing features importanteatures:
- counter-rotation allows for much better performance than standard tube-axial fan against high system impedance
- pulse width modulation (pwm) available for both motors independently or in parallel
- of the following two features, one can be assigned to both motors, or one of each can be applied by request:
   - tachometer output
   - locked rotor signal

for more information see: jmc counter-rotating fan