Fast-Acting Shockless Separation Nut (FASSN) 30K
Sierra Space
The FASSN 30K is a space-qualified, low-shock separation nut designed for restraining and releasing preloaded structural joints in satellites and launch vehicles.
Typed specifications21 values
Discloses 6 of 10 fields engineers filter by in this category (category median 2).
- Mass
- 2 kg max · bolt retractor (EVA feature) (4.5 lbm max.) · datasheet p.2 2.9 kg max · Nut | 2.9 kg max · nut (6.5 lbm max.)
- Preload / holding force
- 44.5 kN min · datasheet p.128 133.4 kN max
- Envelope (L×W×H)
- 127-mm diameter x 178-mm tall bolt retractor (5-in diameter x 7-in tall) · datasheet p.2 127 mm x 127 mm x 127 mm Nut | 127 mm x 127 mm x 127 mm nut envelope (5 in x 5 in x 5 in)
- Release time
- 200 ms max · datasheet p.128
- Release shock
- 100 g max · datasheet p.128
- Separation type
- SMA or frangibolt datasheet p.127 point separation bolts or nuts space-qualified, low-shock separation nut with resettable sha…
- Release command type
- current pulse release signal 3.6 A for 75 ms · datasheet p.2
- Command pulse duration
- 75 ms release signal · datasheet p.2
- Random vibration
- 16.8 g RMS 16.8 Grms for 2 min. per axis · datasheet p.2
- Flight heritage
- Heritage Programs: H2 Transfer Vehicle (HTV) Cargo Pallet Restraint System (30K version); Large Telescope Barrel Cover Release (1K version); Spacecraft Separation (10K version). The 1K, 10K, and 30K versions have all successfully flown in space. datasheet p.2
- Shock qualification
- 100 g max · source shock < 100 G · datasheet p.2
- Stack height
- 127 mm Nut height · datasheet p.128
- Release command (as printed)
- 3.6 A for 75 ms datasheet p.2
- Release current
- 3.6 A release signal · datasheet p.2
- Launch vehicles
- ISS cargo (Dragon/Cygnus/HTV) H2 Transfer Vehicle (HTV) Cargo Pallet Restraint System (30K … · datasheet p.2
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier10 lines, in the manufacturer's own wording
- Load rating
- 5K
- Mechanism
- Toggle bolt with mechanically redundant latch
- Type
- Reusable, low-shock
- Dimensions
- 127 mm x 127 mm x 127 mm (Nut), 127-mm diameter x 178-mm tall (Bolt Retractor)
- Mass
- 2.9 kg max. (Nut), 2.0 kg max. (Bolt Retractor (EVA feature))
- Lifetime
- >50 full load releases
- Release Signal
- 3.6 A for 75 ms
- Release Time
- 200 msec max.
- Source Shock
- <100 G
- Vibration
- 16.8 Grms for 2 min. per axis
About
The Fast-Acting Shockless Separation Nut (FASSN) 30K, offered by Sierra Space, is a critical component for space applications. It is specifically engineered to be space-qualified and provides a low-shock separation mechanism. This device is ideally suited for the secure restraining and subsequent release of preloaded structural joints found in both satellites and launch vehicles. Its design prioritizes minimizing shock during separation events, which is crucial for protecting sensitive spacecraft components.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.