Pierburg CWA100.3 Brushless Water Pump 20mm OD - 12v CWA100-3

Pierburg CWA100.3 Brushless Water Pump 20mm OD - 12v

The Pierburg Electrical CWA coolant pumps make a significant contribution to emission control on modern engine designs. A delivery rate that is not dependent on the speed of another drive enables demand-based cooling. This reduces the power requirements whilst also cutting down on frictional loss, fuel consumption and pollutant emissions.

The noticeable difference compared to the CWA100-2 is that the CWA100-3 has improved EMC behaviour to meet more stringent requirements. The CWA100-3 was produced to be a more accessible and universal pump which features both LIN and PWM onboard interfaces (4 pin version). The CWA100-3 has been improved for high temperature applications and higher lifetime requirements.

Electrical CWA coolant pumps offer top performance. They can be used for the main cooling of the combustion engine, as well as for cooling the fuel cell stacks of fuel cell drives.

Pierburg has made the electrical water pump ready for series production and was the world’s first series-production supplier for a leading premium vehicle manufacturer.

• Compact radial auxiliary coolant pump.
• Speed control and extended diagnostics information via PWM or LIN bus.
• Efficiency close to 40% at the nominal operating point.
• Demand-based cooling.
• High flow rate at a low pressure.
• Homogeneous heat dissipation.
• Optimised for high-temperature applications and more demanding service life requirements.
• Improved resistance to influences that impair EMC.

Connector Part Numbers

Plug, terminals and seals sold separately

Please ensure your supply is fused appropriately.

PWM Input Frequency

The PWM interface has the capability to handle frequencies between 50 to 500 Hz.

The chosen frequency will be automatically detected by the pump

The maximum deviation to the nominal frequency must not exceed 5%

PWM Input Level

Duty Cycle vs Speed

The tolerance of the pump's interpretation of the PWM signal can vary +/-2% of the duty cycle.

Duty Cycle

The percentage duty cycle is represented by the relationship of T_high to T_Period.

Duty cycle is PWM.

Duty Cycle % = T_high / (T_low + T_high).

ATTENTION

• The pump can be installed in either a horizontal or vertical position. To avoid air-locks when mounted horizontally, the outlet should be turned in such a way that it is directed upwards or is placed on the upper side of the pump body.