PB-NUK Radioisotope Thermoelectric Generator

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PB-NUK Radioisotope Thermoelectric Generator
Part image
Ionic Symphonic Protonic Electronics

Radial size Tiny
Cost (total) 23 300.00 Funds
Mass (total) 0.08 t
Drag 0.2
Max. Temp. 1200 K
Volume  ?
Impact Tolerance 7 m/s
Research Experimental electrics.png Experimental Electrics
Unlock cost 58 000 Funds
Since version 0.18
Part configuration RTG.cfg
Electricity generated 0.8 /s

The RTG provides constant and reliable electricity for spacecraft. Its weight/power ratio is a lot worse than that of solar panels (unless you are very far away from the sun - Dres and beyond), but RTGs have the advantage that they do not require direct sunlight, so they still work when on the night side of a planet.

The design of the PB-NUK Radioisotope Thermoelectric Generator is based on those used on the Pioneer 10 and 11 probes.


The Radioisotope Thermoelectric Generator is useful for purposes such as:

  • Traveling so far away from the sun that solar panels become insufficient.
  • Operating energy-consuming equipment on the night-side of a celestial body.
  • Removing the need to take special action to replenish electrical power stores.
  • Emergency backup for a stronger primary power supply.
  • Providing power while stowed in a fairing or cargo bay.

The alternative when there is too little sunlight is to use fuel cells. Which one is better depends on many factors. As a rule of thumb, two RTGs is equivalent in power to a single Fuel Cell after about 1.5 hours of operation, while 24 RTGs is equivalent to a Fuel Cell Array after about 2 hours of operation.

Product description

Through exploitation of the natural decay of Blutonium-238, this elegantly simple power generator can provide consistent, stable power for decades. Not to be used for providing heating during emergency rover excursions.

Ionic Symphonic Protonic Electronics


The description contains a reference to The Martian, where Mark Watney used an RTG to provide heating in order to save power.

  • There are also two parts on the w:New Horizons probe that has the same appearance in-game.


  • Moved from Utility to Electrical
  • Mass reduced from 0.175 to 0.08, power output reduced from 1 E/s to 0.75 E/s.
  • Initial Release