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Liquid Cooling Pumps

We supply liquid cooling pumps for standalone orders and cooling-module projects. Share your operating requirements and installation details to discuss the model and configuration for your application.

R124056SM liquid cooling pump with hose connections and identification label

12V PWM Liquid Cooling Pump

A compact pump with PWM speed control and FG speed feedback for a defined liquid-cooling configuration.

R124056SMAF39MBM

Specify the complete part number when requesting a quotation. The manufacturer drawing defines the body, hose connections and cable assembly.

Rated voltage
12V DC
Rated / maximum power
15W / 18W
Nominal speed endpoints
3000–4500 RPM
Control / feedback
PWM / FG
Bearing
Ceramic
Rated / maximum current
1.25A / 1.50A

Speed tolerance: ±10%. At 0% PWM, this model continues to run at 3000 RPM nominal. Electrical ratings use purified water as the test fluid; startup peak current is listed separately in the PDF.

Manufacturer dimension drawing for R124056SMAF39MBM, dimensions in millimetres

Flow, Head and Installation

The operating point depends on your complete cooling loop, including the cold plate, tubing and connections.

Flow and head performance

The manufacturer’s PDF includes a flow–head curve at 12V and 4500 RPM. Flow and head must be read together at the required operating point; the two curve endpoints are not a simultaneous performance rating.

Share your target flow, pressure drop, coolant and fluid temperature for a project-specific discussion.

View Flow–Head Curve

Dimensions and connections

The drawing shows a 40.30 × 40.30 mm body footprint, hose connections and a four-pin cable assembly. Allow for the ports, cable routing and mounting clearances shown in the complete drawing.

Use the stated connector orientation and pin definition. This pump requires liquid during operation; coolant compatibility and working pressure need to match the application.

View Dimensions and Wiring

Pump Orders and Custom Configurations

Order by part number or send the configuration you need for your cooling assembly.

Order a specified model

Send the part number, quantity and delivery requirements. Include any reference drawing or specification revision that your project requires.

  • Model and sample or production quantity
  • Delivery destination and required timing
  • Required document or inspection package
Request a Pump Quote

Discuss a configuration

Tell us about your hose connections, installation envelope and cable requirements. We will discuss which changes can be supported for the selected model.

  • Coolant, temperature and target operating point
  • Mounting space and liquid connections
  • Cable length, connector and control interface
Discuss Pump Requirements

Download Product Specifications

Get the original PDF for each model directly. No sign-in or inquiry form is required.

R124056SMAF39MBM

Manufacturer specification · Rev B · 2026-05-25 · 27 pages · PDF 3.6 MB

Original manufacturer documents, including drawings, control information and test conditions. Match the complete part number and revision to your requested configuration.

Liquid Cooling Pump FAQs

Answers about ordering, control and the technical information available for your project.

Can I order the pump separately from a cooling module?

Yes. Send the model and required quantity for a standalone quotation. You can also discuss a pump as part of a cooling-module or workstation project.

Does this pump stop at 0% PWM?

No. The R124056SMAF39MBM specification lists 3000 RPM nominal at 0% PWM and 4500 RPM nominal at 100% PWM, both with ±10% tolerance.

Which coolant should I specify?

The manufacturer’s ratings use purified water. Tell us the proposed coolant, concentration and fluid temperature so compatibility can be reviewed for your application.

Can the cable or connector be changed?

Send the requested cable length, connector part number and pin assignment. Available changes and supply conditions are confirmed for the selected configuration.

Where can I find the complete drawing and performance curve?

Download the specification above. The dimension drawing is on PDF page 8 and the flow–head curve on PDF page 12, counting the cover as page 1.