The PBR-10 (Water Resistojet Thruster) is a compact 0.5U propulsion system, the smallest in its class on the market, that generates thrust using water vapor. Designed for 3U–6U CubeSats, it is a fully integrated solution incorporating the thruster head, fluidics, electronics, and propellant tank within a single unit. Its clusterable architecture also enables compatibility with a wide range of spacecraft sizes and mission requirements.

The PBR-10 uses water as propellant, eliminating the need for high-pressure storage systems. The propellant is preloaded into the tank prior to factory delivery, allowing satellite integrators to avoid complex fueling procedures during spacecraft integration.

The propulsion system first demonstrated successful operation in low Earth orbit aboard Japan Aerospace Exploration Agency’s EQUULEUS mission in 2022, validating the technology in spaceflight conditions.

A white paper for the PBR-10 is also available. Please fill out the contact form below to request a copy.