Link-easy Aerospace’s SBN series separation nut is a quite simple and effective hold down and release mechanism actuated by Nitinol shape memory alloy (SMA) wires. The separation nut offers both high load capability (1~35KN) and fast actuation time (~50ms). 

Our separation nut uses segmented nuts with redundant SMA wires as triggers. The SMA trigger allows for a fast response with very low release shock. Redundant switches are incorporated into the device to give “ON” or “OFF” signals when the separation nut is released or armed, simplifying ground operations and flight mission requirements. A swivel mechanism is integrated into the separation nut which enables it to rotate up to ±2°within the mounting enclosure, promising a large tolerance for angular misalignment. The separation nuts are supplied with two mechanical interfaces: standard top mount (SBN-STD) and Bottom Mount (SBN-BM).