HARDWARE / PRODUCTUpdated 25 Jul 2026

PBR-20

Pale Blue
PBR-20

The Pale Blue PBR-20 is a miniaturized 1U water vapor propulsion system, fully integrated with thruster, fluidics, electronics, and propellant tank, designed for small satellites.

Key figurescomparable across the catalogue

Mass
1.5 kg
Power
20 W
Thrust
0.001 N
Total impulse
220 N·s

Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.

As published by the supplier

Power
20 W
Thrust
1.0 mN
Total impulse
> 220 Ns
Wet mass
< 1.5 kg
Envelope
1U
Comm. if
RS-422

About

The Pale Blue PBR-20 is a miniaturized water vapor propulsion system designed for small satellites, specifically in a 1U form factor. This system is fully integrated, incorporating the thruster head, fluidics, electronics, and propellant tank into a single unit. It utilizes water as a propellant, eliminating the need for high-pressure storage, which simplifies handling and integration. The propellant is preloaded into the tank at the factory, removing the need for complex fueling work by satellite integrators. The PBR-20 is clusterable, allowing it to be scaled to meet the propulsion needs of a wide range of spacecraft sizes. It has demonstrated in-orbit operation, with verification after two years in Low Earth Orbit (LEO) on a nanosatellite.

Documentation

No public datasheet yet — request the datasheet / ICD from the supplier.

Source: pale-blue.co.jp ↗

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