HARDWARE / PRODUCTUpdated 24 Jul 2026

Fast-Acting Shockless Separation Nut (FASSN) 30K

Sierra Space
Fast-Acting Shockless Separation Nut (FASSN) 30K

The FASSN 30K is a space-qualified, low-shock separation nut designed for restraining and releasing preloaded structural joints in satellites and launch vehicles.

Technical specifications

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.

Source: www.sierraspace.com ↗

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