Barrow SPG40A-X 18W PWM D5-Class Water Cooling Pump, Aluminum Alloy Heatsink Cover, 1260L/H Max Flow, 4800RPM Max

Barrow SPG40A-X 18W PWM D5-Class Water Cooling Pump, Aluminum Alloy Heatsink Cover, 1260L/H Max Flow, 4800RPM Max

TL;DR: The SPG40A-X is an 18W PWM D5-class permanent magnet synchronous pump aimed at custom loops with multiple radiators and high block count. The pump core delivers up to 1260L/H maximum flow and tops out at 4800RPM, with PWM speed regulation from a 4-pin header on a motherboard or fan hub. The shipped...

Common Applications

The SPG40A-X is an 18W PWM D5-class permanent magnet synchronous pump aimed at custom loops with multiple radiators and high block count. The pump core delivers up to 1260L/H maximum flow and tops out at 4800RPM, with PWM speed regulation from a 4-pin header on a motherboard or fan hub. The shipped assembly includes the pump core, a POM/PMMA top, and a full-cover aluminum alloy heatsink shell that wraps the motor housing to pull heat from the windings during sustained operation. Inlet and outlet are G1/4 threaded, and the pump is compatible with standard D5-series pump cores, tops, and reservoir adapters.

Frequently Asked Questions

Q: Is the SPG40A-X compatible with standard D5 reservoirs and tops?

A: Yes. The footprint follows the D5 series spec, so it pairs with standard D5 tops and reservoir adapters.

Q: What flow rate should I expect?

A: Up to 1260L/H maximum flow with the pump running at full speed (about 4800RPM).

Q: How is speed controlled?

A: By 4-pin PWM signal from a motherboard or fan hub. Lowering the duty cycle reduces RPM and audible noise.

Q: Why does it use an aluminum cover?

A: The full aluminum alloy shell acts as a heatsink for the pump motor, lowering operating temperature during long sessions and extending service life.

Q: What thread are the inlet and outlet?

A: G1/4 on both, accepting any standard G1/4 fitting. The pump ships ready to be installed as the heart of a custom water cooling loop.