Particular design features: Very smooth running 3-phase fan drive. Very high pressure build-up. TDM and TDML model with backward-curved RadiCal impeller with maximum efficiency. Standard models available with multifunctional control input for analogue, PWM and speed signal. General features: Impeller made of fibreglass-reinforced plastic. Electronic commutation completely integrated. Direction of rotation: clockwise, seen on rotor. Direction of air flow: axial air intake, centrifugal air exhaust. Connection via single strands AWG 18, 20 or AWG 22, TR 64, speed signal and control input AWG 22, bared and tin-plated. Mass: 1030 g